96 lines
4.2 KiB
YAML
96 lines
4.2 KiB
YAML
# RUN: llc %s -o - -experimental-debug-variable-locations -run-pass=peephole-opt | FileCheck %s
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#
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# X86 initially produces subtract operations to perform comparisons, and then
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# downgrades them into cmp instructions if nothing uses the result. It does this
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# by calling setDesc on the instruction, mutating it from one sort to another,
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# which makes any debug instruction numbers attached to the number invalid.
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# This test tests that the relevant instruction number is dropped.
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#
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# CHECK-NOT: debug-instr-number
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# CHECK: CMP32rm
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# CHECK-NOT: debug-instr-number
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#
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--- |
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; ModuleID = '/fast/fs/build34llvm4/reduced.ll'
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%"class.std::vector.534" = type { %"struct.std::_Vector_base.535" }
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%"struct.std::_Vector_base.535" = type { %"struct.std::_Vector_base<unsigned char, std::allocator<unsigned char>>::_Vector_impl" }
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%"struct.std::_Vector_base<unsigned char, std::allocator<unsigned char>>::_Vector_impl" = type { i8*, i8*, i8* }
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
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define hidden fastcc void @soup() unnamed_addr !dbg !3 {
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_ZN4llvm11raw_ostreamlsEPKc.exit2752:
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%0 = load %"class.std::vector.534"*, %"class.std::vector.534"** undef, align 8, !dbg !7
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%1 = load i8*, i8** undef, align 8, !dbg !7
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%_M_start.i2756 = getelementptr inbounds %"class.std::vector.534", %"class.std::vector.534"* %0, i64 undef, i32 0, i32 0, i32 0, !dbg !7
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%2 = load i8*, i8** %_M_start.i2756, align 8, !dbg !7
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%sub.ptr.lhs.cast.i2757 = ptrtoint i8* %1 to i64, !dbg !7
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%sub.ptr.rhs.cast.i2758 = ptrtoint i8* %2 to i64, !dbg !7
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%sub.ptr.sub.i2759 = sub i64 %sub.ptr.lhs.cast.i2757, %sub.ptr.rhs.cast.i2758, !dbg !7
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%conv373 = trunc i64 %sub.ptr.sub.i2759 to i32, !dbg !7
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call void @llvm.dbg.value(metadata i32 %conv373, metadata !8, metadata !DIExpression()), !dbg !7
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%cmp375.not2842 = icmp eq i32 %conv373, 0, !dbg !7
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br i1 %cmp375.not2842, label %for.cond.cleanup376, label %for.body377, !dbg !7
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for.cond.cleanup376: ; preds = %_ZN4llvm11raw_ostreamlsEPKc.exit2752
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ret void
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for.body377: ; preds = %_ZN4llvm11raw_ostreamlsEPKc.exit2752
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ret void
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}
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #0
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attributes #0 = { nofree nosync nounwind readnone speculatable willreturn }
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!llvm.module.flags = !{!0}
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!llvm.dbg.cu = !{!1}
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!0 = !{i32 2, !"Debug Info Version", i32 3}
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!1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "beards", isOptimized: true, runtimeVersion: 4, emissionKind: FullDebug)
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!2 = !DIFile(filename: "bees.cpp", directory: "")
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!3 = distinct !DISubprogram(name: "nope", scope: !2, file: !2, line: 1, type: !4, spFlags: DISPFlagDefinition, unit: !1)
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!4 = !DISubroutineType(types: !5)
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!5 = !{!6}
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!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!7 = !DILocation(line: 1, scope: !3)
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!8 = !DILocalVariable(name: "flannel", scope: !3)
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...
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---
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name: soup
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alignment: 16
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tracksRegLiveness: true
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debugInstrRef: true
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registers:
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- { id: 0, class: gr64 }
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- { id: 1, class: gr64 }
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- { id: 2, class: gr32 }
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- { id: 3, class: gr32 }
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frameInfo:
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maxAlignment: 1
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machineFunctionInfo: {}
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body: |
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bb.0._ZN4llvm11raw_ostreamlsEPKc.exit2752:
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successors: %bb.1(0x30000000), %bb.2(0x50000000)
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%1:gr64 = IMPLICIT_DEF
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%0:gr64 = MOV64rm killed %1, 1, $noreg, 0, $noreg, debug-location !7 :: (load (s64) from `i8** undef`)
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%2:gr32 = COPY %0.sub_32bit, debug-location !7
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%3:gr32 = SUB32rm %2, %0, 1, $noreg, 0, $noreg, implicit-def $eflags, debug-instr-number 1, debug-location !7 :: (load (s32) from %ir._M_start.i2756, align 8)
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DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !7
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JCC_1 %bb.2, 5, implicit $eflags, debug-location !7
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JMP_1 %bb.1, debug-location !7
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bb.1.for.cond.cleanup376:
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RET 0
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bb.2.for.body377:
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RET 0
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...
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