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0c1aee0b16
As a follow-up to r246098, require `DISubprogram` definitions
(`isDefinition: true`) to be 'distinct'. Specifically, add an assembler
check, a verifier check, and bitcode upgrading logic to combat testcase
bitrot after the `DIBuilder` change.
While working on the testcases, I realized that
test/Linker/subprogram-linkonce-weak-odr.ll isn't relevant anymore. Its
purpose was to check for a corner case in PR22792 where two subprogram
definitions match exactly and share the same metadata node. The new
verifier check, requiring that subprogram definitions are 'distinct',
precludes that possibility.
I updated almost all the IR with the following script:
git grep -l -E -e '= !DISubprogram\(.* isDefinition: true' |
grep -v test/Bitcode |
xargs sed -i '' -e 's/= \(!DISubprogram(.*, isDefinition: true\)/= distinct \1/'
Likely some variant of would work for out-of-tree testcases.
llvm-svn: 246327
85 lines
3.3 KiB
LLVM
85 lines
3.3 KiB
LLVM
; RUN: llc < %s -march=x86-64 -mtriple=x86_64-linux | FileCheck %s
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; The Peephole optimizer should fold the load into the cmp even with debug info.
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; CHECK-LABEL: _ZN3Foo3batEv
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; CHECK-NOT: movq pfoo
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; CHECK: cmpq {{%[a-z]+}}, pfoo(%rip)
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;
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; CHECK-LABEL: _Z3bazv
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; CHECK-NOT: movq wibble2
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; CHECK: cmpq {{%[a-z]+}}, wibble2(%rip)
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; Regenerate test with this command:
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; clang -emit-llvm -S -O2 -g
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; from this source:
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; struct Foo {
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; bool bat();
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; bool operator==(Foo &arg) { return (this == &arg); }
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; };
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; Foo *pfoo;
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; bool Foo::bat() { return (*this == *pfoo); }
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;
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; struct Wibble {
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; int x;
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; } *wibble1, *wibble2;
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; struct Flibble {
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; void bar(Wibble *c) {
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; if (c < wibble2)
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; wibble2 = 0;
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; c->x = 0;
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; }
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; } flibble;
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; void baz() { flibble.bar(wibble1); }
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%struct.Foo = type { i8 }
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%struct.Wibble = type { i32 }
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%struct.Flibble = type { i8 }
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@pfoo = global %struct.Foo* null, align 8
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@wibble1 = global %struct.Wibble* null, align 8
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@wibble2 = global %struct.Wibble* null, align 8
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@flibble = global %struct.Flibble zeroinitializer, align 1
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; Function Attrs: nounwind readonly uwtable
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define zeroext i1 @_ZN3Foo3batEv(%struct.Foo* %this) #0 align 2 {
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entry:
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%0 = load %struct.Foo*, %struct.Foo** @pfoo, align 8
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tail call void @llvm.dbg.value(metadata %struct.Foo* %0, i64 0, metadata !62, metadata !DIExpression()), !dbg !DILocation(scope: !1)
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%cmp.i = icmp eq %struct.Foo* %0, %this
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ret i1 %cmp.i
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}
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; Function Attrs: nounwind uwtable
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define void @_Z3bazv() #1 {
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entry:
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%0 = load %struct.Wibble*, %struct.Wibble** @wibble1, align 8
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tail call void @llvm.dbg.value(metadata %struct.Flibble* undef, i64 0, metadata !65, metadata !DIExpression()), !dbg !DILocation(scope: !1)
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%1 = load %struct.Wibble*, %struct.Wibble** @wibble2, align 8
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%cmp.i = icmp ugt %struct.Wibble* %1, %0
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br i1 %cmp.i, label %if.then.i, label %_ZN7Flibble3barEP6Wibble.exit
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if.then.i: ; preds = %entry
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store %struct.Wibble* null, %struct.Wibble** @wibble2, align 8
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br label %_ZN7Flibble3barEP6Wibble.exit
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_ZN7Flibble3barEP6Wibble.exit: ; preds = %entry, %if.then.i
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%x.i = getelementptr inbounds %struct.Wibble, %struct.Wibble* %0, i64 0, i32 0
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store i32 0, i32* %x.i, align 4
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ret void
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
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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" }
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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" }
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attributes #2 = { nounwind readnone }
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!1 = distinct !DISubprogram()
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!17 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: null)
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!45 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: null)
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!62 = !DILocalVariable(name: "arg", line: 4, arg: 2, scope: !1, type: !17)
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!64 = !{%struct.Flibble* undef}
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!65 = !DILocalVariable(name: "this", line: 13, arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !1, type: !45)
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