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; RUN: llc < %s -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 ptr 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 = dso_local global ptr null, align 8
@wibble1 = dso_local global ptr null, align 8
@wibble2 = dso_local global ptr null, align 8
@flibble = dso_local global %struct.Flibble zeroinitializer, align 1
; Function Attrs: nounwind readonly uwtable
define zeroext i1 @_ZN3Foo3batEv(ptr %this) #0 align 2 {
entry:
%0 = load ptr, ptr @pfoo, align 8
tail call void @llvm.dbg.value(metadata ptr %0, i64 0, metadata !62, metadata !DIExpression()), !dbg !DILocation(scope: !1)
%cmp.i = icmp eq ptr %0, %this
ret i1 %cmp.i
}
; Function Attrs: nounwind uwtable
define dso_local void @_Z3bazv() #1 {
entry:
%0 = load ptr, ptr @wibble1, align 8
tail call void @llvm.dbg.value(metadata ptr undef, i64 0, metadata !65, metadata !DIExpression()), !dbg !DILocation(scope: !1)
%1 = load ptr, ptr @wibble2, align 8
%cmp.i = icmp ugt ptr %1, %0
br i1 %cmp.i, label %if.then.i, label %_ZN7Flibble3barEP6Wibble.exit
if.then.i: ; preds = %entry
store ptr null, ptr @wibble2, align 8
br label %_ZN7Flibble3barEP6Wibble.exit
_ZN7Flibble3barEP6Wibble.exit: ; preds = %entry, %if.then.i
store i32 0, ptr %0, align 4
ret void
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
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" }
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" }
attributes #2 = { nounwind readnone }
!1 = distinct !DISubprogram()
!17 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: null)
!45 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: null)
!62 = !DILocalVariable(name: "arg", line: 4, arg: 2, scope: !1, type: !17)
!64 = !{ptr undef}
!65 = !DILocalVariable(name: "this", line: 13, arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !1, type: !45)
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