1 ; RUN: llc < %s -march=x86-64 -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); }
24 ; } *wibble1, *wibble2;
26 ; void bar(Wibble *c) {
32 ; void baz() { flibble.bar(wibble1); }
34 %struct.Foo = type { i8 }
35 %struct.Wibble = type { i32 }
36 %struct.Flibble = type { i8 }
38 @pfoo = global %struct.Foo* null, align 8
39 @wibble1 = global %struct.Wibble* null, align 8
40 @wibble2 = global %struct.Wibble* null, align 8
41 @flibble = global %struct.Flibble zeroinitializer, align 1
43 ; Function Attrs: nounwind readonly uwtable
44 define zeroext i1 @_ZN3Foo3batEv(%struct.Foo* %this) #0 align 2 {
46 %0 = load %struct.Foo** @pfoo, align 8
47 tail call void @llvm.dbg.value(metadata !{%struct.Foo* %0}, i64 0, metadata !62, metadata !{})
48 %cmp.i = icmp eq %struct.Foo* %0, %this
52 ; Function Attrs: nounwind uwtable
53 define void @_Z3bazv() #1 {
55 %0 = load %struct.Wibble** @wibble1, align 8
56 tail call void @llvm.dbg.value(metadata !64, i64 0, metadata !65, metadata !{})
57 %1 = load %struct.Wibble** @wibble2, align 8
58 %cmp.i = icmp ugt %struct.Wibble* %1, %0
59 br i1 %cmp.i, label %if.then.i, label %_ZN7Flibble3barEP6Wibble.exit
61 if.then.i: ; preds = %entry
62 store %struct.Wibble* null, %struct.Wibble** @wibble2, align 8
63 br label %_ZN7Flibble3barEP6Wibble.exit
65 _ZN7Flibble3barEP6Wibble.exit: ; preds = %entry, %if.then.i
66 %x.i = getelementptr inbounds %struct.Wibble* %0, i64 0, i32 0
67 store i32 0, i32* %x.i, align 4
71 ; Function Attrs: nounwind readnone
72 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
74 attributes #0 = { nounwind readonly uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
75 attributes #1 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
76 attributes #2 = { nounwind readnone }
79 !17 = metadata !{i32 786448, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, null} ; [ DW_TAG_reference_type ] [line 0, size 0, align 0, offset 0] [from Foo]
80 !45 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, null} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from Flibble]
81 !62 = metadata !{i32 786689, null, metadata !"arg", null, i32 33554436, metadata !17, i32 0, null} ; [ DW_TAG_arg_variable ] [arg] [line 4]
82 !64 = metadata !{%struct.Flibble* undef}
83 !65 = metadata !{i32 786689, null, metadata !"this", null, i32 16777229, metadata !45, i32 1088, null} ; [ DW_TAG_arg_variable ] [this] [line 13]