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1; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s2 3; The Peephole optimizer should fold the load into the cmp even with debug info.4; CHECK-LABEL: _ZN3Foo3batEv5; CHECK-NOT: movq pfoo6; CHECK: cmpq {{%[a-z]+}}, pfoo(%rip)7;8; CHECK-LABEL: _Z3bazv9; CHECK-NOT: movq wibble210; CHECK: cmpq {{%[a-z]+}}, wibble2(%rip)11 12; Regenerate test with this command: 13; clang -emit-llvm -S -O2 -g14; from this source:15; struct Foo {16; bool bat();17; bool operator==(Foo &arg) { return (this == &arg); }18; };19; Foo *pfoo;20; bool Foo::bat() { return (*this == *pfoo); }21;22; struct Wibble ptr wibble1, *wibble2;23; struct Flibble {24; void bar(Wibble *c) {25; if (c < wibble2)26; wibble2 = 0;27; c->x = 0;28; }29; } flibble;30; void baz() { flibble.bar(wibble1); }31 32%struct.Foo = type { i8 }33%struct.Wibble = type { i32 }34%struct.Flibble = type { i8 }35 36@pfoo = dso_local global ptr null, align 837@wibble1 = dso_local global ptr null, align 838@wibble2 = dso_local global ptr null, align 839@flibble = dso_local global %struct.Flibble zeroinitializer, align 140 41; Function Attrs: nounwind readonly uwtable42define zeroext i1 @_ZN3Foo3batEv(ptr %this) #0 align 2 {43entry:44 %0 = load ptr, ptr @pfoo, align 845 tail call void @llvm.dbg.value(metadata ptr %0, i64 0, metadata !62, metadata !DIExpression()), !dbg !DILocation(scope: !1)46 %cmp.i = icmp eq ptr %0, %this47 ret i1 %cmp.i48}49 50; Function Attrs: nounwind uwtable51define dso_local void @_Z3bazv() #1 {52entry:53 %0 = load ptr, ptr @wibble1, align 854 tail call void @llvm.dbg.value(metadata ptr undef, i64 0, metadata !65, metadata !DIExpression()), !dbg !DILocation(scope: !1)55 %1 = load ptr, ptr @wibble2, align 856 %cmp.i = icmp ugt ptr %1, %057 br i1 %cmp.i, label %if.then.i, label %_ZN7Flibble3barEP6Wibble.exit58 59if.then.i: ; preds = %entry60 store ptr null, ptr @wibble2, align 861 br label %_ZN7Flibble3barEP6Wibble.exit62 63_ZN7Flibble3barEP6Wibble.exit: ; preds = %entry, %if.then.i64 store i32 0, ptr %0, align 465 ret void66}67 68; Function Attrs: nounwind readnone69declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #270 71attributes #0 = { nounwind readonly uwtable "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "use-soft-float"="false" }72attributes #1 = { nounwind uwtable "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "use-soft-float"="false" }73attributes #2 = { nounwind readnone }74 75!1 = distinct !DISubprogram()76 77!17 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: null)78!45 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: null)79!62 = !DILocalVariable(name: "arg", line: 4, arg: 2, scope: !1, type: !17)80!64 = !{ptr undef}81!65 = !DILocalVariable(name: "this", line: 13, arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !1, type: !45)82