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; RUN: llc < %s -march=x86-64 -mtriple=x86_64-linux | FileCheck %s
; The Peephole optimizer should fold the load into the cmp even with debug info.
; CHECK-LABEL: _ZN3Foo3batEv
; CHECK-NOT: movq pfoo
; CHECK: cmpq {{%[a-z]+}}, pfoo(%rip)
;
; CHECK-LABEL: _Z3bazv
; CHECK-NOT: movq wibble2
; CHECK: cmpq {{%[a-z]+}}, wibble2(%rip)
; Regenerate test with this command:
; clang -emit-llvm -S -O2 -g
; from this source:
; struct Foo {
; bool bat();
; bool operator==(Foo &arg) { return (this == &arg); }
; };
; Foo *pfoo;
; bool Foo::bat() { return (*this == *pfoo); }
;
; struct Wibble {
; int x;
; } *wibble1, *wibble2;
; struct Flibble {
; void bar(Wibble *c) {
; if (c < wibble2)
; wibble2 = 0;
; c->x = 0;
; }
; } flibble;
; void baz() { flibble.bar(wibble1); }
%struct.Foo = type { i8 }
%struct.Wibble = type { i32 }
%struct.Flibble = type { i8 }
@pfoo = global %struct.Foo* null, align 8
@wibble1 = global %struct.Wibble* null, align 8
@wibble2 = global %struct.Wibble* null, align 8
@flibble = global %struct.Flibble zeroinitializer, align 1
; Function Attrs: nounwind readonly uwtable
define zeroext i1 @_ZN3Foo3batEv(%struct.Foo* %this) #0 align 2 {
entry:
%0 = load %struct.Foo** @pfoo, align 8
tail call void @llvm.dbg.value(metadata !{%struct.Foo* %0}, i64 0, metadata !62)
%cmp.i = icmp eq %struct.Foo* %0, %this
ret i1 %cmp.i
}
; Function Attrs: nounwind uwtable
define void @_Z3bazv() #1 {
entry:
%0 = load %struct.Wibble** @wibble1, align 8
tail call void @llvm.dbg.value(metadata !64, i64 0, metadata !65)
%1 = load %struct.Wibble** @wibble2, align 8
%cmp.i = icmp ugt %struct.Wibble* %1, %0
br i1 %cmp.i, label %if.then.i, label %_ZN7Flibble3barEP6Wibble.exit
if.then.i: ; preds = %entry
store %struct.Wibble* null, %struct.Wibble** @wibble2, align 8
br label %_ZN7Flibble3barEP6Wibble.exit
_ZN7Flibble3barEP6Wibble.exit: ; preds = %entry, %if.then.i
%x.i = getelementptr inbounds %struct.Wibble* %0, i64 0, i32 0
store i32 0, i32* %x.i, align 4
ret void
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata) #2
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" }
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" }
attributes #2 = { nounwind readnone }
!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]
!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]
!62 = metadata !{i32 786689, null, metadata !"arg", null, i32 33554436, metadata !17, i32 0, null} ; [ DW_TAG_arg_variable ] [arg] [line 4]
!64 = metadata !{%struct.Flibble* undef}
!65 = metadata !{i32 786689, null, metadata !"this", null, i32 16777229, metadata !45, i32 1088, null} ; [ DW_TAG_arg_variable ] [this] [line 13]
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