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748 lines
25 KiB
748 lines
25 KiB
// RUN: %clang_cc1 -std=c++11 -fsanitize=signed-integer-overflow,integer-divide-by-zero,float-divide-by-zero,shift-base,shift-exponent,unreachable,return,vla-bound,alignment,null,vptr,object-size,float-cast-overflow,bool,enum,array-bounds,function -fsanitize-recover=signed-integer-overflow,integer-divide-by-zero,float-divide-by-zero,shift-base,shift-exponent,vla-bound,alignment,null,vptr,object-size,float-cast-overflow,bool,enum,array-bounds,function -emit-llvm %s -o - -triple x86_64-linux-gnu | opt -instnamer -S | FileCheck %s
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// RUN: %clang_cc1 -std=c++11 -fsanitize=vptr,address -fsanitize-recover=vptr,address -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-ASAN
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// RUN: %clang_cc1 -std=c++11 -fsanitize=vptr -fsanitize-recover=vptr -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=DOWNCAST-NULL
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// RUN: %clang_cc1 -std=c++11 -fsanitize=function -emit-llvm %s -o - -triple x86_64-linux-gnux32 | FileCheck %s --check-prefix=CHECK-X32
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// RUN: %clang_cc1 -std=c++11 -fsanitize=function -emit-llvm %s -o - -triple i386-linux-gnu | FileCheck %s --check-prefix=CHECK-X86
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struct S {
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double d;
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int a, b;
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virtual int f();
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};
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// Check that type descriptor global is not modified by ASan.
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// CHECK-ASAN: [[TYPE_DESCR:@[0-9]+]] = private unnamed_addr constant { i16, i16, [4 x i8] } { i16 -1, i16 0, [4 x i8] c"'S'\00" }
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// Check that type mismatch handler is not modified by ASan.
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// CHECK-ASAN: private unnamed_addr global { { [{{.*}} x i8]*, i32, i32 }, { i16, i16, [4 x i8] }*, i8*, i8 } { {{.*}}, { i16, i16, [4 x i8] }* [[TYPE_DESCR]], {{.*}} }
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// CHECK: [[IndirectRTTI_ZTIFvPFviEE:@.+]] = private constant i8* bitcast ({ i8*, i8* }* @_ZTIFvPFviEE to i8*)
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// CHECK-X86: [[IndirectRTTI_ZTIFvPFviEE:@.+]] = private constant i8* bitcast ({ i8*, i8* }* @_ZTIFvPFviEE to i8*)
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// CHECK-X32: [[IndirectRTTI_ZTIFvPFviEE:@.+]] = private constant i8* bitcast ({ i8*, i8* }* @_ZTIFvPFviEE to i8*)
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struct T : S {};
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// CHECK-LABEL: @_Z17reference_binding
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void reference_binding(int *p, S *q) {
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// C++ core issue 453: If an lvalue to which a reference is directly bound
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// designates neither an existing object or function of an appropriate type,
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// nor a region of storage of suitable size and alignment to contain an object
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// of the reference's type, the behavior is undefined.
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// CHECK: icmp ne {{.*}}, null
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// CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
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// CHECK-NEXT: icmp uge i64 %[[SIZE]], 4
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// CHECK: %[[PTRINT:.*]] = ptrtoint
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// CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3
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// CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0
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int &r = *p;
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// A reference is not required to refer to an object within its lifetime.
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// CHECK-NOT: __ubsan_handle_dynamic_type_cache_miss
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S &r2 = *q;
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}
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// CHECK-LABEL: @_Z13member_access
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// CHECK-ASAN-LABEL: @_Z13member_access
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void member_access(S *p) {
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// (1a) Check 'p' is appropriately sized and aligned for member access.
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// CHECK: icmp ne {{.*}}, null
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// CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
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// CHECK-NEXT: icmp uge i64 %[[SIZE]], 24
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// CHECK: %[[PTRINT:.*]] = ptrtoint
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// CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 7
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// CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0
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// (1b) Check that 'p' actually points to an 'S'.
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// CHECK: %[[VPTRADDR:.*]] = bitcast {{.*}} to i64*
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// CHECK-NEXT: %[[VPTR:.*]] = load i64, i64* %[[VPTRADDR]]
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//
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// hash_16_bytes:
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//
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// If this number changes, it indicates that either the mangled name of ::S
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// has changed, or that LLVM's hashing function has changed. The latter case
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// is OK if the hashing function is still stable.
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//
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// The two hash values are for 64- and 32-bit Clang binaries, respectively.
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// FIXME: We should produce a 64-bit value either way.
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//
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// CHECK-NEXT: xor i64 {{-4030275160588942838|1107558922}}, %[[VPTR]]
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// CHECK-NEXT: mul i64 {{.*}}, -7070675565921424023
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// CHECK-NEXT: lshr i64 {{.*}}, 47
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// CHECK-NEXT: xor i64
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// CHECK-NEXT: xor i64 %[[VPTR]]
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// CHECK-NEXT: mul i64 {{.*}}, -7070675565921424023
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// CHECK-NEXT: lshr i64 {{.*}}, 47
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// CHECK-NEXT: xor i64
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// CHECK-NEXT: %[[HASH:.*]] = mul i64 {{.*}}, -7070675565921424023
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//
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// Check the hash against the table:
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//
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// CHECK-NEXT: %[[IDX:.*]] = and i64 %{{.*}}, 127
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// CHECK-NEXT: getelementptr inbounds [128 x i64], [128 x i64]* @__ubsan_vptr_type_cache, i32 0, i64 %[[IDX]]
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// CHECK-NEXT: %[[CACHEVAL:.*]] = load i64, i64*
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// CHECK-NEXT: icmp eq i64 %[[CACHEVAL]], %[[HASH]]
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// CHECK-NEXT: br i1
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// CHECK: call void @__ubsan_handle_dynamic_type_cache_miss({{.*}}, i64 %{{.*}}, i64 %[[HASH]])
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// CHECK-NOT: unreachable
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// CHECK: {{.*}}:
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// (2) Check 'p->b' is appropriately sized and aligned for a load.
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// FIXME: Suppress this in the trivial case of a member access, because we
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// know we've just checked the member access expression itself.
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// CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
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// CHECK-NEXT: icmp uge i64 %[[SIZE]], 4
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// CHECK: %[[PTRINT:.*]] = ptrtoint
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// CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3
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// CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0
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int k = p->b;
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// (3a) Check 'p' is appropriately sized and aligned for member function call.
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// CHECK: icmp ne {{.*}}, null
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// CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
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// CHECK-NEXT: icmp uge i64 %[[SIZE]], 24
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// CHECK: %[[PTRINT:.*]] = ptrtoint
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// CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 7
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// CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0
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// (3b) Check that 'p' actually points to an 'S'
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// CHECK: load i64, i64*
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// CHECK-NEXT: xor i64 {{-4030275160588942838|1107558922}},
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// [...]
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// CHECK: getelementptr inbounds [128 x i64], [128 x i64]* @__ubsan_vptr_type_cache, i32 0, i64 %
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// CHECK: br i1
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// CHECK: call void @__ubsan_handle_dynamic_type_cache_miss({{.*}}, i64 %{{.*}}, i64 %{{.*}})
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// CHECK-NOT: unreachable
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// CHECK: {{.*}}:
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k = p->f();
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}
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// CHECK-LABEL: @_Z12lsh_overflow
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int lsh_overflow(int a, int b) {
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// CHECK: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31
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// CHECK-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[CHECK_BB:.*]], label %[[CONT_BB:.*]],
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// CHECK: [[CHECK_BB]]:
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// CHECK-NEXT: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]]
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// CHECK-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]]
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// This is present for C++11 but not for C: C++ core issue 1457 allows a '1'
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// to be shifted into the sign bit, but not out of it.
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// CHECK-NEXT: %[[SHIFTED_OUT_NOT_SIGN:.*]] = lshr i32 %[[SHIFTED_OUT]], 1
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// CHECK-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT_NOT_SIGN]], 0
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// CHECK-NEXT: br label %[[CONT_BB]]
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// CHECK: [[CONT_BB]]:
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// CHECK-NEXT: %[[VALID_BASE:.*]] = phi i1 [ true, {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECK_BB]] ]
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// CHECK-NEXT: %[[VALID:.*]] = and i1 %[[RHS_INBOUNDS]], %[[VALID_BASE]]
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// CHECK-NEXT: br i1 %[[VALID]]
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// CHECK: call void @__ubsan_handle_shift_out_of_bounds
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// CHECK-NOT: call void @__ubsan_handle_shift_out_of_bounds
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// CHECK: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]]
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// CHECK-NEXT: ret i32 %[[RET]]
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return a << b;
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}
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// CHECK-LABEL: @_Z9no_return
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int no_return() {
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// CHECK: call void @__ubsan_handle_missing_return(i8* bitcast ({{.*}}* @{{.*}} to i8*)) [[NR_NUW:#[0-9]+]]
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// CHECK-NEXT: unreachable
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}
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// CHECK-LABEL: @_Z9sour_bool
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bool sour_bool(bool *p) {
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// CHECK: %[[OK:.*]] = icmp ule i8 {{.*}}, 1
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// CHECK: br i1 %[[OK]]
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// CHECK: call void @__ubsan_handle_load_invalid_value(i8* bitcast ({{.*}}), i64 {{.*}})
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return *p;
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}
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enum E1 { e1a = 0, e1b = 127 } e1;
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enum E2 { e2a = -1, e2b = 64 } e2;
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enum E3 { e3a = (1u << 31) - 1 } e3;
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// CHECK-LABEL: @_Z14bad_enum_value
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int bad_enum_value() {
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// CHECK: %[[E1:.*]] = icmp ule i32 {{.*}}, 127
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// CHECK: br i1 %[[E1]]
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// CHECK: call void @__ubsan_handle_load_invalid_value(
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int a = e1;
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// CHECK: %[[E2HI:.*]] = icmp sle i32 {{.*}}, 127
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// CHECK: %[[E2LO:.*]] = icmp sge i32 {{.*}}, -128
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// CHECK: %[[E2:.*]] = and i1 %[[E2HI]], %[[E2LO]]
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// CHECK: br i1 %[[E2]]
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// CHECK: call void @__ubsan_handle_load_invalid_value(
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int b = e2;
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// CHECK: %[[E3:.*]] = icmp ule i32 {{.*}}, 2147483647
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// CHECK: br i1 %[[E3]]
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// CHECK: call void @__ubsan_handle_load_invalid_value(
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int c = e3;
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return a + b + c;
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}
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// CHECK-LABEL: @_Z20bad_downcast_pointer
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// DOWNCAST-NULL-LABEL: @_Z20bad_downcast_pointer
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void bad_downcast_pointer(S *p) {
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// CHECK: %[[NONNULL:.*]] = icmp ne {{.*}}, null
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// CHECK: br i1 %[[NONNULL]],
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// A null pointer access is guarded without -fsanitize=null.
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// DOWNCAST-NULL: %[[NONNULL:.*]] = icmp ne {{.*}}, null
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// DOWNCAST-NULL: br i1 %[[NONNULL]],
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// CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(
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// CHECK: %[[E1:.*]] = icmp uge i64 %[[SIZE]], 24
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// CHECK: %[[MISALIGN:.*]] = and i64 %{{.*}}, 7
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// CHECK: %[[E2:.*]] = icmp eq i64 %[[MISALIGN]], 0
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// CHECK: %[[E12:.*]] = and i1 %[[E1]], %[[E2]]
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// CHECK: br i1 %[[E12]],
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// CHECK: call void @__ubsan_handle_type_mismatch
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// CHECK: br label
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// CHECK: br i1 %{{.*}},
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// CHECK: call void @__ubsan_handle_dynamic_type_cache_miss
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// CHECK: br label
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(void) static_cast<T*>(p);
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}
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// CHECK-LABEL: @_Z22bad_downcast_reference
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void bad_downcast_reference(S &p) {
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// CHECK: %[[E1:.*]] = icmp ne {{.*}}, null
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// CHECK-NOT: br i1
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// CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(
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// CHECK: %[[E2:.*]] = icmp uge i64 %[[SIZE]], 24
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// CHECK: %[[MISALIGN:.*]] = and i64 %{{.*}}, 7
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// CHECK: %[[E3:.*]] = icmp eq i64 %[[MISALIGN]], 0
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// CHECK: %[[E12:.*]] = and i1 %[[E1]], %[[E2]]
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// CHECK: %[[E123:.*]] = and i1 %[[E12]], %[[E3]]
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// CHECK: br i1 %[[E123]],
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// CHECK: call void @__ubsan_handle_type_mismatch
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// CHECK: br label
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// CHECK: br i1 %{{.*}},
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// CHECK: call void @__ubsan_handle_dynamic_type_cache_miss
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// CHECK: br label
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(void) static_cast<T&>(p);
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}
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// CHECK-LABEL: @_Z11array_index
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int array_index(const int (&a)[4], int n) {
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// CHECK: %[[K1_OK:.*]] = icmp ult i64 %{{.*}}, 4
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// CHECK: br i1 %[[K1_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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int k1 = a[n];
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// CHECK: %[[R1_OK:.*]] = icmp ule i64 %{{.*}}, 4
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// CHECK: br i1 %[[R1_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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const int *r1 = &a[n];
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// CHECK: %[[K2_OK:.*]] = icmp ult i64 %{{.*}}, 8
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// CHECK: br i1 %[[K2_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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int k2 = ((const int(&)[8])a)[n];
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// CHECK: %[[K3_OK:.*]] = icmp ult i64 %{{.*}}, 4
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// CHECK: br i1 %[[K3_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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int k3 = n[a];
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return k1 + *r1 + k2;
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}
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// CHECK-LABEL: @_Z17multi_array_index
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int multi_array_index(int n, int m) {
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int arr[4][6];
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// CHECK: %[[IDX1_OK:.*]] = icmp ult i64 %{{.*}}, 4
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// CHECK: br i1 %[[IDX1_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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// CHECK: %[[IDX2_OK:.*]] = icmp ult i64 %{{.*}}, 6
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// CHECK: br i1 %[[IDX2_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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return arr[n][m];
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}
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// CHECK-LABEL: @_Z11array_arith
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int array_arith(const int (&a)[4], int n) {
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// CHECK: %[[K1_OK:.*]] = icmp ule i64 %{{.*}}, 4
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// CHECK: br i1 %[[K1_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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const int *k1 = a + n;
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// CHECK: %[[K2_OK:.*]] = icmp ule i64 %{{.*}}, 8
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// CHECK: br i1 %[[K2_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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const int *k2 = (const int(&)[8])a + n;
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return *k1 + *k2;
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}
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struct ArrayMembers {
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int a1[5];
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int a2[1];
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};
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// CHECK-LABEL: @_Z18struct_array_index
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int struct_array_index(ArrayMembers *p, int n) {
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// CHECK: %[[IDX_OK:.*]] = icmp ult i64 %{{.*}}, 5
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// CHECK: br i1 %[[IDX_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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return p->a1[n];
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}
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// CHECK-LABEL: @_Z16flex_array_index
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int flex_array_index(ArrayMembers *p, int n) {
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// CHECK-NOT: call void @__ubsan_handle_out_of_bounds(
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return p->a2[n];
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}
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extern int incomplete[];
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// CHECK-LABEL: @_Z22incomplete_array_index
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int incomplete_array_index(int n) {
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// CHECK-NOT: call void @__ubsan_handle_out_of_bounds(
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return incomplete[n];
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}
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typedef __attribute__((ext_vector_type(4))) int V4I;
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// CHECK-LABEL: @_Z12vector_index
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int vector_index(V4I v, int n) {
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// CHECK: %[[IDX_OK:.*]] = icmp ult i64 %{{.*}}, 4
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// CHECK: br i1 %[[IDX_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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return v[n];
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}
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// CHECK-LABEL: @_Z12string_index
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char string_index(int n) {
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// CHECK: %[[IDX_OK:.*]] = icmp ult i64 %{{.*}}, 6
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// CHECK: br i1 %[[IDX_OK]]
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// CHECK: call void @__ubsan_handle_out_of_bounds(
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return "Hello"[n];
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}
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class A // align=4
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{
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int a1, a2, a3;
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};
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class B // align=8
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{
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long b1, b2;
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};
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class C : public A, public B // align=16
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{
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alignas(16) int c1;
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};
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// Make sure we check the alignment of the pointer after subtracting any
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// offset. The pointer before subtraction doesn't need to be aligned for
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// the destination type.
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// CHECK-LABEL: define void @_Z16downcast_pointerP1B(%class.B* %b)
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void downcast_pointer(B *b) {
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(void) static_cast<C*>(b);
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// Alignment check from EmitTypeCheck(TCK_DowncastPointer, ...)
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// CHECK: [[SUB:%[.a-z0-9]*]] = getelementptr inbounds i8, i8* {{.*}}, i64 -16
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// CHECK-NEXT: [[C:%.+]] = bitcast i8* [[SUB]] to %class.C*
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// null check goes here
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// CHECK: [[FROM_PHI:%.+]] = phi %class.C* [ [[C]], {{.*}} ], {{.*}}
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// Objectsize check goes here
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// CHECK: [[C_INT:%.+]] = ptrtoint %class.C* [[FROM_PHI]] to i64
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// CHECK-NEXT: [[MASKED:%.+]] = and i64 [[C_INT]], 15
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// CHECK-NEXT: [[TEST:%.+]] = icmp eq i64 [[MASKED]], 0
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// AND the alignment test with the objectsize test.
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// CHECK-NEXT: [[AND:%.+]] = and i1 {{.*}}, [[TEST]]
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// CHECK-NEXT: br i1 [[AND]]
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}
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// CHECK-LABEL: define void @_Z18downcast_referenceR1B(%class.B* nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) %b)
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void downcast_reference(B &b) {
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(void) static_cast<C&>(b);
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// Alignment check from EmitTypeCheck(TCK_DowncastReference, ...)
|
|
// CHECK: [[SUB:%[.a-z0-9]*]] = getelementptr inbounds i8, i8* {{.*}}, i64 -16
|
|
// CHECK-NEXT: [[C:%.+]] = bitcast i8* [[SUB]] to %class.C*
|
|
// Objectsize check goes here
|
|
// CHECK: [[C_INT:%.+]] = ptrtoint %class.C* [[C]] to i64
|
|
// CHECK-NEXT: [[MASKED:%.+]] = and i64 [[C_INT]], 15
|
|
// CHECK-NEXT: [[TEST:%.+]] = icmp eq i64 [[MASKED]], 0
|
|
// AND the alignment test with the objectsize test.
|
|
// CHECK: [[AND:%.+]] = and i1 {{.*}}, [[TEST]]
|
|
// CHECK-NEXT: br i1 [[AND]]
|
|
}
|
|
|
|
//
|
|
// CHECK-LABEL: @_Z22indirect_function_callPFviE({{.*}} prologue <{ i32, i32 }> <{ i32 846595819, i32 trunc (i64 sub (i64 ptrtoint (i8** {{.*}} to i64), i64 ptrtoint (void (void (i32)*)* @_Z22indirect_function_callPFviE to i64)) to i32) }>
|
|
// CHECK-X32: @_Z22indirect_function_callPFviE({{.*}} prologue <{ i32, i32 }> <{ i32 846595819, i32 sub (i32 ptrtoint (i8** [[IndirectRTTI_ZTIFvPFviEE]] to i32), i32 ptrtoint (void (void (i32)*)* @_Z22indirect_function_callPFviE to i32)) }>
|
|
// CHECK-X86: @_Z22indirect_function_callPFviE({{.*}} prologue <{ i32, i32 }> <{ i32 846595819, i32 sub (i32 ptrtoint (i8** [[IndirectRTTI_ZTIFvPFviEE]] to i32), i32 ptrtoint (void (void (i32)*)* @_Z22indirect_function_callPFviE to i32)) }>
|
|
void indirect_function_call(void (*p)(int)) {
|
|
// CHECK: [[PTR:%.+]] = bitcast void (i32)* {{.*}} to <{ i32, i32 }>*
|
|
|
|
// Signature check
|
|
// CHECK-NEXT: [[SIGPTR:%.+]] = getelementptr <{ i32, i32 }>, <{ i32, i32 }>* [[PTR]], i32 0, i32 0
|
|
// CHECK-NEXT: [[SIG:%.+]] = load i32, i32* [[SIGPTR]]
|
|
// CHECK-NEXT: [[SIGCMP:%.+]] = icmp eq i32 [[SIG]], 846595819
|
|
// CHECK-NEXT: br i1 [[SIGCMP]]
|
|
|
|
// RTTI pointer check
|
|
// CHECK: [[RTTIPTR:%.+]] = getelementptr <{ i32, i32 }>, <{ i32, i32 }>* [[PTR]], i32 0, i32 1
|
|
// CHECK-NEXT: [[RTTIEncIntTrunc:%.+]] = load i32, i32* [[RTTIPTR]]
|
|
// CHECK-NEXT: [[RTTIEncInt:%.+]] = sext i32 [[RTTIEncIntTrunc]] to i64
|
|
// CHECK-NEXT: [[FuncAddrInt:%.+]] = ptrtoint void (i32)* {{.*}} to i64
|
|
// CHECK-NEXT: [[IndirectGVInt:%.+]] = add i64 [[RTTIEncInt]], [[FuncAddrInt]]
|
|
// CHECK-NEXT: [[IndirectGV:%.+]] = inttoptr i64 [[IndirectGVInt]] to i8**
|
|
// CHECK-NEXT: [[RTTI:%.+]] = load i8*, i8** [[IndirectGV]], align 8
|
|
// CHECK-NEXT: [[RTTICMP:%.+]] = icmp eq i8* [[RTTI]], bitcast ({ i8*, i8* }* @_ZTIFviE to i8*)
|
|
// CHECK-NEXT: br i1 [[RTTICMP]]
|
|
|
|
p(42);
|
|
}
|
|
|
|
namespace VBaseObjectSize {
|
|
// Note: C is laid out such that offsetof(C, B) + sizeof(B) extends outside
|
|
// the C object.
|
|
struct alignas(16) A { void *a1, *a2; };
|
|
struct B : virtual A { void *b; };
|
|
struct C : virtual A, virtual B {};
|
|
// CHECK-LABEL: define {{.*}} @_ZN15VBaseObjectSize1fERNS_1BE(
|
|
B &f(B &b) {
|
|
// Size check: check for nvsize(B) == 16 (do not require size(B) == 32)
|
|
// CHECK: [[SIZE:%.+]] = call i{{32|64}} @llvm.objectsize.i64.p0i8(
|
|
// CHECK: icmp uge i{{32|64}} [[SIZE]], 16,
|
|
|
|
// Alignment check: check for nvalign(B) == 8 (do not require align(B) == 16)
|
|
// CHECK: [[PTRTOINT:%.+]] = ptrtoint {{.*}} to i64,
|
|
// CHECK: and i64 [[PTRTOINT]], 7,
|
|
return b;
|
|
}
|
|
}
|
|
|
|
namespace FunctionSanitizerVirtualCalls {
|
|
struct A {
|
|
virtual void f() {}
|
|
virtual void g() {}
|
|
void h() {}
|
|
};
|
|
|
|
struct B : virtual A {
|
|
virtual void b() {}
|
|
virtual void f();
|
|
void g() final {}
|
|
static void q() {}
|
|
};
|
|
|
|
void B::f() {}
|
|
|
|
void force_irgen() {
|
|
A a;
|
|
a.g();
|
|
a.h();
|
|
|
|
B b;
|
|
b.f();
|
|
b.b();
|
|
b.g();
|
|
B::q();
|
|
}
|
|
|
|
// CHECK-LABEL: define void @_ZN29FunctionSanitizerVirtualCalls1B1fEv
|
|
// CHECK-NOT: prologue
|
|
//
|
|
// CHECK-LABEL: define void @_ZTv0_n24_N29FunctionSanitizerVirtualCalls1B1fEv
|
|
// CHECK-NOT: prologue
|
|
//
|
|
// CHECK-LABEL: define void @_ZN29FunctionSanitizerVirtualCalls11force_irgenEv()
|
|
// CHECK: prologue
|
|
//
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1AC1Ev
|
|
// CHECK-NOT: prologue
|
|
//
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1A1gEv
|
|
// CHECK-NOT: prologue
|
|
//
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1A1hEv
|
|
// CHECK-NOT: prologue
|
|
//
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1BC1Ev
|
|
// CHECK-NOT: prologue
|
|
//
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1B1bEv
|
|
// CHECK-NOT: prologue
|
|
//
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1B1gEv
|
|
// CHECK-NOT: prologue
|
|
//
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN29FunctionSanitizerVirtualCalls1B1qEv
|
|
// CHECK: prologue
|
|
|
|
}
|
|
|
|
namespace UpcastPointerTest {
|
|
struct S {};
|
|
struct T : S { double d; };
|
|
struct V : virtual S {};
|
|
|
|
// CHECK-LABEL: upcast_pointer
|
|
S* upcast_pointer(T* t) {
|
|
// Check for null pointer
|
|
// CHECK: %[[NONNULL:.*]] = icmp ne {{.*}}, null
|
|
// CHECK: br i1 %[[NONNULL]]
|
|
|
|
// Check alignment
|
|
// CHECK: %[[MISALIGN:.*]] = and i64 %{{.*}}, 7
|
|
// CHECK: icmp eq i64 %[[MISALIGN]], 0
|
|
|
|
// CHECK: call void @__ubsan_handle_type_mismatch
|
|
return t;
|
|
}
|
|
|
|
V getV();
|
|
|
|
// CHECK-LABEL: upcast_to_vbase
|
|
void upcast_to_vbase() {
|
|
// No need to check for null here, as we have a temporary here.
|
|
|
|
// CHECK-NOT: br i1
|
|
|
|
// CHECK: call i64 @llvm.objectsize
|
|
// CHECK: call void @__ubsan_handle_type_mismatch
|
|
// CHECK: call void @__ubsan_handle_dynamic_type_cache_miss
|
|
const S& s = getV();
|
|
}
|
|
}
|
|
|
|
struct nothrow {};
|
|
void *operator new[](__SIZE_TYPE__, nothrow) noexcept;
|
|
|
|
namespace NothrowNew {
|
|
struct X { X(); };
|
|
|
|
// CHECK-LABEL: define{{.*}}nothrow_new_trivial
|
|
void *nothrow_new_trivial() {
|
|
// CHECK: %[[is_null:.*]] = icmp eq i8*{{.*}}, null
|
|
// CHECK: br i1 %[[is_null]], label %[[null:.*]], label %[[nonnull:.*]]
|
|
|
|
// CHECK: [[nonnull]]:
|
|
// CHECK: llvm.objectsize
|
|
// CHECK: icmp uge i64 {{.*}}, 123456,
|
|
// CHECK: br i1
|
|
//
|
|
// CHECK: call {{.*}}__ubsan_handle_type_mismatch
|
|
//
|
|
// CHECK: [[null]]:
|
|
// CHECK-NOT: {{ }}br{{ }}
|
|
// CHECK: ret
|
|
return new (nothrow{}) char[123456];
|
|
}
|
|
|
|
// CHECK-LABEL: define{{.*}}nothrow_new_nontrivial
|
|
void *nothrow_new_nontrivial() {
|
|
// CHECK: %[[is_null:.*]] = icmp eq i8*{{.*}}, null
|
|
// CHECK: br i1 %[[is_null]], label %[[null:.*]], label %[[nonnull:.*]]
|
|
|
|
// CHECK: [[nonnull]]:
|
|
// CHECK: llvm.objectsize
|
|
// CHECK: icmp uge i64 {{.*}}, 123456,
|
|
// CHECK: br i1
|
|
//
|
|
// CHECK: call {{.*}}__ubsan_handle_type_mismatch
|
|
//
|
|
// CHECK: call {{.*}}_ZN10NothrowNew1XC1Ev
|
|
//
|
|
// CHECK: [[null]]:
|
|
// CHECK-NOT: {{ }}br{{ }}
|
|
// CHECK: ret
|
|
return new (nothrow{}) X[123456];
|
|
}
|
|
|
|
// CHECK-LABEL: define{{.*}}throwing_new
|
|
void *throwing_new(int size) {
|
|
// CHECK: icmp ne i8*{{.*}}, null
|
|
// CHECK: %[[size:.*]] = mul
|
|
// CHECK: llvm.objectsize
|
|
// CHECK: icmp uge i64 {{.*}}, %[[size]],
|
|
// CHECK: %[[ok:.*]] = and
|
|
// CHECK: br i1 %[[ok]], label %[[good:.*]], label %[[bad:[^,]*]]
|
|
//
|
|
// CHECK: [[bad]]:
|
|
// CHECK: call {{.*}}__ubsan_handle_type_mismatch
|
|
//
|
|
// CHECK: [[good]]:
|
|
// CHECK-NOT: {{ }}br{{ }}
|
|
// CHECK: ret
|
|
return new char[size];
|
|
}
|
|
|
|
// CHECK-LABEL: define{{.*}}nothrow_new_zero_size
|
|
void *nothrow_new_zero_size() {
|
|
// CHECK: %[[nonnull:.*]] = icmp ne i8*{{.*}}, null
|
|
// CHECK-NOT: llvm.objectsize
|
|
// CHECK: br i1 %[[nonnull]], label %[[good:.*]], label %[[bad:[^,]*]]
|
|
//
|
|
// CHECK: [[bad]]:
|
|
// CHECK: call {{.*}}__ubsan_handle_type_mismatch
|
|
//
|
|
// CHECK: [[good]]:
|
|
// CHECK-NOT: {{ }}br{{ }}
|
|
// CHECK: ret
|
|
return new char[0];
|
|
}
|
|
|
|
// CHECK-LABEL: define{{.*}}throwing_new_zero_size
|
|
void *throwing_new_zero_size() {
|
|
// Nothing to check here.
|
|
// CHECK-NOT: __ubsan_handle_type_mismatch
|
|
return new (nothrow{}) char[0];
|
|
// CHECK: ret
|
|
}
|
|
}
|
|
|
|
struct ThisAlign {
|
|
void this_align_lambda();
|
|
void this_align_lambda_2();
|
|
};
|
|
void ThisAlign::this_align_lambda() {
|
|
// CHECK-LABEL: define internal %struct.ThisAlign* @"_ZZN9ThisAlign17this_align_lambdaEvENK3$_0clEv"
|
|
// CHECK-SAME: (%{{.*}}* {{[^,]*}} %[[this:[^)]*]])
|
|
// CHECK: %[[this_addr:.*]] = alloca
|
|
// CHECK: store %{{.*}}* %[[this]], %{{.*}}** %[[this_addr]],
|
|
// CHECK: %[[this_inner:.*]] = load %{{.*}}*, %{{.*}}** %[[this_addr]],
|
|
// CHECK: %[[this_outer_addr:.*]] = getelementptr inbounds %{{.*}}, %{{.*}}* %[[this_inner]], i32 0, i32 0
|
|
// CHECK: %[[this_outer:.*]] = load %{{.*}}*, %{{.*}}** %[[this_outer_addr]],
|
|
//
|
|
// CHECK: %[[this_inner_isnonnull:.*]] = icmp ne %{{.*}}* %[[this_inner]], null
|
|
// CHECK: %[[this_inner_asint:.*]] = ptrtoint %{{.*}}* %[[this_inner]] to i
|
|
// CHECK: %[[this_inner_misalignment:.*]] = and i{{32|64}} %[[this_inner_asint]], {{3|7}},
|
|
// CHECK: %[[this_inner_isaligned:.*]] = icmp eq i{{32|64}} %[[this_inner_misalignment]], 0
|
|
// CHECK: %[[this_inner_valid:.*]] = and i1 %[[this_inner_isnonnull]], %[[this_inner_isaligned]],
|
|
// CHECK: br i1 %[[this_inner_valid:.*]]
|
|
[&] { return this; } ();
|
|
}
|
|
|
|
namespace CopyValueRepresentation {
|
|
// CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S3aSERKS0_
|
|
// CHECK-NOT: call {{.*}} @__ubsan_handle_load_invalid_value
|
|
// CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S4aSEOS0_
|
|
// CHECK-NOT: call {{.*}} @__ubsan_handle_load_invalid_value
|
|
// CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S1C2ERKS0_
|
|
// CHECK-NOT: call {{.*}} __ubsan_handle_load_invalid_value
|
|
// CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S2C2ERKS0_
|
|
// CHECK: __ubsan_handle_load_invalid_value
|
|
// CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S5C2ERKS0_
|
|
// CHECK-NOT: call {{.*}} __ubsan_handle_load_invalid_value
|
|
|
|
struct CustomCopy { CustomCopy(); CustomCopy(const CustomCopy&); };
|
|
struct S1 {
|
|
CustomCopy CC;
|
|
bool b;
|
|
};
|
|
void callee1(S1);
|
|
void test1() {
|
|
S1 s11;
|
|
callee1(s11);
|
|
S1 s12;
|
|
s12 = s11;
|
|
}
|
|
|
|
static bool some_global_bool;
|
|
struct ExprCopy {
|
|
ExprCopy();
|
|
ExprCopy(const ExprCopy&, bool b = some_global_bool);
|
|
};
|
|
struct S2 {
|
|
ExprCopy EC;
|
|
bool b;
|
|
};
|
|
void callee2(S2);
|
|
void test2(void) {
|
|
S2 s21;
|
|
callee2(s21);
|
|
S2 s22;
|
|
s22 = s21;
|
|
}
|
|
|
|
struct CustomAssign { CustomAssign &operator=(const CustomAssign&); };
|
|
struct S3 {
|
|
CustomAssign CA;
|
|
bool b;
|
|
};
|
|
void test3() {
|
|
S3 x, y;
|
|
x = y;
|
|
}
|
|
|
|
struct CustomMove {
|
|
CustomMove();
|
|
CustomMove(const CustomMove&&);
|
|
CustomMove &operator=(const CustomMove&&);
|
|
};
|
|
struct S4 {
|
|
CustomMove CM;
|
|
bool b;
|
|
};
|
|
void test4() {
|
|
S4 x, y;
|
|
x = static_cast<S4&&>(y);
|
|
}
|
|
|
|
struct EnumCustomCopy {
|
|
EnumCustomCopy();
|
|
EnumCustomCopy(const EnumCustomCopy&);
|
|
};
|
|
struct S5 {
|
|
EnumCustomCopy ECC;
|
|
bool b;
|
|
};
|
|
void callee5(S5);
|
|
void test5() {
|
|
S5 s51;
|
|
callee5(s51);
|
|
S5 s52;
|
|
s52 = s51;
|
|
}
|
|
}
|
|
|
|
void ThisAlign::this_align_lambda_2() {
|
|
// CHECK-LABEL: define internal void @"_ZZN9ThisAlign19this_align_lambda_2EvENK3$_1clEv"
|
|
// CHECK-SAME: (%{{.*}}* {{[^,]*}} %[[this:[^)]*]])
|
|
// CHECK: %[[this_addr:.*]] = alloca
|
|
// CHECK: store %{{.*}}* %[[this]], %{{.*}}** %[[this_addr]],
|
|
// CHECK: %[[this_inner:.*]] = load %{{.*}}*, %{{.*}}** %[[this_addr]],
|
|
//
|
|
// Do not perform a null check on the 'this' pointer if the function might be
|
|
// called from a static invoker.
|
|
// CHECK-NOT: icmp ne %{{.*}}* %[[this_inner]], null
|
|
auto *p = +[] {};
|
|
p();
|
|
}
|
|
|
|
// CHECK: attributes [[NR_NUW]] = { noreturn nounwind }
|