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GlobalISel: fall back gracefully for debug intrinsics.

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Supporting them properly is a reasonably complex chunk of work, so to allow bot
testing before then we should at least be able to fall back to DAG ISel.

llvm-svn: 289150
This commit is contained in:
Tim Northover 2016-12-08 22:44:13 +00:00
parent 9192e8f992
commit 7be37de3d0
2 changed files with 39 additions and 0 deletions
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6
lib/CodeGen/GlobalISel/IRTranslator.cpp
View File

@ -466,6 +466,12 @@ bool IRTranslator::translateKnownIntrinsic(const CallInst &CI, Intrinsic::ID ID,
switch (ID) {
default:
break;
case Intrinsic::dbg_declare:
case Intrinsic::dbg_value:
// FIXME: these obviously need to be supported properly.
MF->getProperties().set(
MachineFunctionProperties::Property::FailedISel);
return true;
case Intrinsic::uadd_with_overflow:
return translateOverflowIntrinsic(CI, TargetOpcode::G_UADDE, MIRBuilder);
case Intrinsic::sadd_with_overflow:

33
test/CodeGen/AArch64/GlobalISel/arm64-fallback.ll
View File

@ -82,3 +82,36 @@ define void @legal_default(i64 %in) {
insertvalue [2 x i64] undef, i64 %in, 0
ret void
}
; FALLBACK-WITH-REPORT-ERR: warning: Instruction selection used fallback path for debug_insts
; FALLBACK-WITH-REPORT-LABEL: debug_insts:
define void @debug_insts(i32 %in) #0 !dbg !7 {
entry:
%in.addr = alloca i32, align 4
store i32 %in, i32* %in.addr, align 4
call void @llvm.dbg.declare(metadata i32* %in.addr, metadata !11, metadata !12), !dbg !13
ret void, !dbg !14
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 289075) (llvm/trunk 289080)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "tmp.c", directory: "/Users/tim/llvm/build")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"PIC Level", i32 2}
!6 = !{!"clang version 4.0.0 (trunk 289075) (llvm/trunk 289080)"}
!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2)
!8 = !DISubroutineType(types: !9)
!9 = !{null, !10}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !DILocalVariable(name: "in", arg: 1, scope: !7, file: !1, line: 1, type: !10)
!12 = !DIExpression()
!13 = !DILocation(line: 1, column: 14, scope: !7)
!14 = !DILocation(line: 2, column: 1, scope: !7)