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192 lines
7.3 KiB
192 lines
7.3 KiB
4 months ago
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# RUN: llc -run-pass=livedebugvalues -march=mips -o - %s | FileCheck %s
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#
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#"last-instr-bundled.c"
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#extern void set_cond(int, int*);
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#extern void do_something(char *,int);
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#
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#void foo (int argument)
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#{
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# int condition;
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# char *string;
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#
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# set_cond(argument,&condition);
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#
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# if (condition)
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# do_something(string,argument);
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#}
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#
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# reproduce:
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# clang --target=mips-linux-gnu -g -O1 -S -emit-llvm last-instr-bundled
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# llc -stop-before=livedebugvalues < last-instr-bundled.ll > last-instr-bundled.mir
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#
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# Check that last bundled instruction of block gets recognized as end of basic block.
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# CHECK: bb.2.if.end
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# CHECK-NEXT: DBG_VALUE $s0, $noreg, !12, !DIExpression()
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--- |
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; ModuleID = '<stdin>'
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source_filename = "last-inst-bundled.c"
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target datalayout = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64"
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target triple = "mips--linux-gnu"
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define void @foo(i32 signext %argument) local_unnamed_addr !dbg !7 {
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entry:
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%condition = alloca i32, align 4
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call void @llvm.dbg.value(metadata i32 %argument, metadata !12, metadata !DIExpression()), !dbg !17
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%0 = bitcast i32* %condition to i8*, !dbg !18
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call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !18
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call void @llvm.dbg.value(metadata i32* %condition, metadata !13, metadata !DIExpression()), !dbg !19
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call void @set_cond(i32 signext %argument, i32* nonnull %condition), !dbg !20
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%1 = load i32, i32* %condition, align 4, !dbg !21, !tbaa !23
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call void @llvm.dbg.value(metadata i32 %1, metadata !13, metadata !DIExpression()), !dbg !19
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%tobool = icmp eq i32 %1, 0, !dbg !21
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br i1 %tobool, label %if.end, label %if.then, !dbg !27
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if.then: ; preds = %entry
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call void @do_something(i8* undef, i32 signext %argument), !dbg !28
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br label %if.end, !dbg !28
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if.end: ; preds = %if.then, %entry
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%2 = bitcast i32* %condition to i8*
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call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %2), !dbg !29
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ret void, !dbg !29
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #0
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declare void @set_cond(i32 signext, i32*) local_unnamed_addr
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declare void @do_something(i8*, i32 signext) local_unnamed_addr
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #0
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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; Function Attrs: nounwind
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declare void @llvm.stackprotector(i8*, i8**) #2
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attributes #0 = { argmemonly nounwind }
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attributes #1 = { nounwind readnone speculatable }
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attributes #2 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "last-inst-bundled.c", directory: "/")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 6.0.0 "}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12, !13, !14}
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!12 = !DILocalVariable(name: "argument", arg: 1, scope: !7, file: !1, line: 4, type: !10)
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!13 = !DILocalVariable(name: "condition", scope: !7, file: !1, line: 6, type: !10)
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!14 = !DILocalVariable(name: "string", scope: !7, file: !1, line: 7, type: !15)
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!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 32)
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!16 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!17 = !DILocation(line: 4, column: 15, scope: !7)
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!18 = !DILocation(line: 6, column: 3, scope: !7)
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!19 = !DILocation(line: 6, column: 7, scope: !7)
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!20 = !DILocation(line: 9, column: 3, scope: !7)
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!21 = !DILocation(line: 11, column: 7, scope: !22)
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!22 = distinct !DILexicalBlock(scope: !7, file: !1, line: 11, column: 7)
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!23 = !{!24, !24, i64 0}
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!24 = !{!"int", !25, i64 0}
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!25 = !{!"omnipotent char", !26, i64 0}
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!26 = !{!"Simple C/C++ TBAA"}
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!27 = !DILocation(line: 11, column: 7, scope: !7)
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!28 = !DILocation(line: 12, column: 5, scope: !22)
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!29 = !DILocation(line: 13, column: 1, scope: !7)
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...
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---
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name: foo
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alignment: 4
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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tracksRegLiveness: false
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registers:
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liveins:
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- { reg: '$a0', virtual-reg: '' }
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: false
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hasPatchPoint: false
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stackSize: 32
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offsetAdjustment: 0
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maxAlignment: 4
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adjustsStack: true
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hasCalls: true
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stackProtector: ''
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maxCallFrameSize: 16
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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savePoint: ''
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restorePoint: ''
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fixedStack:
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stack:
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- { id: 0, name: condition, type: default, offset: -12, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '',
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debug-info-location: '' }
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- { id: 1, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '$ra', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '',
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debug-info-location: '' }
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- { id: 2, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '$s0', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '',
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debug-info-location: '' }
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constants:
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body: |
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bb.0.entry:
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successors: %bb.2(0x30000000), %bb.1(0x50000000)
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$sp = ADDiu $sp, -32
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CFI_INSTRUCTION def_cfa_offset 32
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SW killed $ra, $sp, 28 :: (store 4 into %stack.1)
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SW killed $s0, $sp, 24 :: (store 4 into %stack.2)
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CFI_INSTRUCTION offset $ra_64, -4
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CFI_INSTRUCTION offset $s0_64, -8
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DBG_VALUE $a0, $noreg, !12, !DIExpression(), debug-location !17
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$s0 = OR $a0, $zero
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DBG_VALUE $s0, $noreg, !12, !DIExpression(), debug-location !17
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DBG_VALUE $sp, 0, !13, !DIExpression(DW_OP_plus_uconst, 20), debug-location !19
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JAL @set_cond, csr_o32, implicit-def dead $ra, implicit $a0, implicit $a1, implicit-def $sp, debug-location !20 {
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renamable $a1 = LEA_ADDiu $sp, 20
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}
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renamable $at = LW $sp, 20, debug-location !21 :: (dereferenceable load 4 from %ir.condition, !tbaa !23)
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DBG_VALUE $at, $noreg, !13, !DIExpression(), debug-location !19
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BEQ killed renamable $at, $zero, %bb.2, implicit-def $at, debug-location !27 {
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NOP debug-location !27
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}
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bb.1.if.then:
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successors: %bb.2(0x80000000)
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JAL @do_something, csr_o32, implicit-def dead $ra, implicit undef $a0, implicit $a1, implicit-def $sp, debug-location !28 {
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$a1 = OR killed $s0, $zero, debug-location !28
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}
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bb.2.if.end:
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$s0 = LW $sp, 24, debug-location !29 :: (load 4 from %stack.2)
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$ra = LW $sp, 28, debug-location !29 :: (load 4 from %stack.1)
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PseudoReturn undef $ra, debug-location !29 {
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$sp = ADDiu $sp, 32
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}
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...
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