89 lines
3.2 KiB
Plaintext
89 lines
3.2 KiB
Plaintext
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# RUN: llc -mtriple=x86_64-none-linux-gnu -run-pass=postra-machine-sink -verify-machineinstrs -o - %s | FileCheck %s
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#
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# This test was originally generated from the following sample:
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#
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# int x0;
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# extern void x3(int, int);
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# void x1(int x2) {
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# if (x0)
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# x3(0, x2);
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# }
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#
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# The code generates a COPY instruction which the PostRA Machine Sink pass will
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# try to sink. Earlier versions were not performing the sink due to a
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# DBG_VALUE instruction confusing the sinking algorithm.
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--- |
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@x0 = common dso_local global i32 0, align 4, !dbg !0
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define dso_local void @x1(i32) !dbg !11 {
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%2 = alloca i32, align 4
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store i32 %0, i32* %2, align 4
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call void @llvm.dbg.declare(metadata i32* %2, metadata !14, metadata !DIExpression()), !dbg !16
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%3 = load i32, i32* @x0, align 4, !dbg !16
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%4 = icmp ne i32 %3, 0, !dbg !16
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br i1 %4, label %5, label %7, !dbg !16
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; <label>:5: ; preds = %1
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%6 = load i32, i32* %2, align 4, !dbg !16
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call void @x3(i32 0, i32 %6), !dbg !16
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br label %7, !dbg !16
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; <label>:7: ; preds = %5, %1
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ret void, !dbg !16
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}
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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declare dso_local void @x3(i32, i32)
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!7, !8}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "x0", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "test.c", directory: "")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!11 = distinct !DISubprogram(name: "x1", scope: !3, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !2)
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!12 = !DISubroutineType(types: !13)
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!13 = !{null, !6}
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!14 = !DILocalVariable(name: "x2", arg: 1, scope: !11, file: !3, line: 3, type: !6)
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!15 = distinct !DILexicalBlock(scope: !11, file: !3, line: 4, column: 7)
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!16 = !DILocation(line: 4, column: 7, scope: !15)
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...
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---
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# CHECK: name: x1
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# CHECK: bb.0:
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# CHECK-NOT: $eax = COPY $edi
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# CHECK: bb.1:
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# CHECK: renamable $eax = COPY $edi
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# CHECK-NEXT: DBG_VALUE $eax,
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# CHECK: bb.2:
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name: x1
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alignment: 16
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tracksRegLiveness: true
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body: |
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bb.0:
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successors: %bb.2, %bb.1; %bb.2, %bb.1
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liveins: $edi
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DBG_VALUE $edi, $noreg, !14, !DIExpression(), debug-location !16
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renamable $eax = COPY $edi
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DBG_VALUE $eax, $noreg, !14, !DIExpression(), debug-location !16
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CMP32mi8 $rip, 1, $noreg, @x0, $noreg, 0, implicit-def $eflags, debug-location !16
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JCC_1 %bb.2, 4, implicit killed $eflags, debug-location !16
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JMP_1 %bb.1, debug-location !16
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bb.1:
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liveins: $eax
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$edi = MOV32r0 implicit-def dead $eflags, debug-location !16
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$esi = COPY killed renamable $eax, debug-location !16
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bb.2:
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RET 0, debug-location !16
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...
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