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20 lines
763 B
20 lines
763 B
4 months ago
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// RUN: %clang_cc1 -std=c++2a -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,REGULAR
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// RUN: %clang_cc1 -std=c++2a -fsanitize=shift-base,shift-exponent -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,SANITIZED
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// CHECK-LABEL: @_Z12lsh_overflow
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int lsh_overflow(int a, int b) {
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// SANITIZED: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31
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// SANITIZED-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[VALID:.*]], label
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// SANITIZED: call void @__ubsan_handle_shift_out_of_bounds
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// No check for the LHS here.
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// SANITIZED: [[VALID]]:
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// SANITIZED-NEXT: shl i32 %
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// SANITIZED-NEXT: ret i32
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// Just ensure there's no nsw nuw flags here.
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// REGULAR: shl i32 %
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return a << b;
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}
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