forked from OSchip/llvm-project
84 lines
3.4 KiB
LLVM
84 lines
3.4 KiB
LLVM
; 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*, %struct.Foo** @pfoo, align 8
|
|
tail call void @llvm.dbg.value(metadata %struct.Foo* %0, i64 0, metadata !62, metadata !DIExpression()), !dbg !DILocation(scope: !DISubprogram())
|
|
%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*, %struct.Wibble** @wibble1, align 8
|
|
tail call void @llvm.dbg.value(metadata %struct.Flibble* undef, i64 0, metadata !65, metadata !DIExpression()), !dbg !DILocation(scope: !DISubprogram())
|
|
%1 = load %struct.Wibble*, %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, %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, 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 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: null)
|
|
!45 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: null)
|
|
!62 = !DILocalVariable(tag: DW_TAG_arg_variable, name: "arg", line: 4, arg: 2, scope: !DISubprogram(), type: !17)
|
|
!64 = !{%struct.Flibble* undef}
|
|
!65 = !DILocalVariable(tag: DW_TAG_arg_variable, name: "this", line: 13, arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !DISubprogram(), type: !45)
|