1 ; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s
3 ; The Peephole optimizer should fold the load into the cmp even with debug info.
4 ; CHECK-LABEL: _ZN3Foo3batEv
6 ; CHECK: cmpq {{%[a-z]+}}, pfoo(%rip)
9 ; CHECK-NOT: movq wibble2
10 ; CHECK: cmpq {{%[a-z]+}}, wibble2(%rip)
12 ; Regenerate test with this command:
13 ; clang -emit-llvm -S -O2 -g
17 ; bool operator==(Foo &arg) { return (this == &arg); }
20 ; bool Foo::bat() { return (*this == *pfoo); }
22 ; struct Wibble ptr wibble1, *wibble2;
24 ; void bar(Wibble *c) {
30 ; void baz() { flibble.bar(wibble1); }
32 %struct.Foo = type { i8 }
33 %struct.Wibble = type { i32 }
34 %struct.Flibble = type { i8 }
36 @pfoo = dso_local global ptr null, align 8
37 @wibble1 = dso_local global ptr null, align 8
38 @wibble2 = dso_local global ptr null, align 8
39 @flibble = dso_local global %struct.Flibble zeroinitializer, align 1
41 ; Function Attrs: nounwind readonly uwtable
42 define zeroext i1 @_ZN3Foo3batEv(ptr %this) #0 align 2 {
44 %0 = load ptr, ptr @pfoo, align 8
45 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, %this
50 ; Function Attrs: nounwind uwtable
51 define dso_local void @_Z3bazv() #1 {
53 %0 = load ptr, ptr @wibble1, align 8
54 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 8
56 %cmp.i = icmp ugt ptr %1, %0
57 br i1 %cmp.i, label %if.then.i, label %_ZN7Flibble3barEP6Wibble.exit
59 if.then.i: ; preds = %entry
60 store ptr null, ptr @wibble2, align 8
61 br label %_ZN7Flibble3barEP6Wibble.exit
63 _ZN7Flibble3barEP6Wibble.exit: ; preds = %entry, %if.then.i
64 store i32 0, ptr %0, align 4
68 ; Function Attrs: nounwind readnone
69 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
71 attributes #0 = { nounwind readonly uwtable "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
72 attributes #1 = { nounwind uwtable "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
73 attributes #2 = { nounwind readnone }
75 !1 = distinct !DISubprogram()
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)
81 !65 = !DILocalVariable(name: "this", line: 13, arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !1, type: !45)