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Fix code gen crash reported in PR 8235. We still lose debug info for the unused argument here. This is a known limitation recorded debuginfo-tests/trunk/dbg-declare2.ll function 'f6' test case.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115323 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-10-01 19:00:44 +00:00
parent bffa1a5cf3
commit 27f46cd639
2 changed files with 24 additions and 0 deletions
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3
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -3955,6 +3955,9 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
const TargetRegisterInfo *TRI = DAG.getTarget().getRegisterInfo();
Reg = TRI->getFrameRegister(MF);
Offset = FuncInfo.getByValArgumentFrameIndex(Arg);
// If byval argument ofset is not recorded then ignore this.
if (!Offset)
Reg = 0;
}
if (N.getNode() && N.getOpcode() == ISD::CopyFromReg) {

21
test/DebugInfo/2010-10-01-crash.ll Normal file
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@ -0,0 +1,21 @@
; RUN: llc -O0 %s -o /dev/null
; PR 8235
define void @CGRectStandardize(i32* sret %agg.result, i32* byval %rect) nounwind ssp {
entry:
call void @llvm.dbg.declare(metadata !{i32* %rect}, metadata !23), !dbg !24
ret void
}
declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
!0 = metadata !{i32 589870, i32 0, metadata !1, metadata !"CGRectStandardize", metadata !"CGRectStandardize", metadata !"CGRectStandardize", metadata !1, i32 54, null, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 false, void (i32*, i32*)* @CGRectStandardize} ; [ DW_TAG_subprogram ]
!1 = metadata !{i32 589865, metadata !"GSFusedSilica.m", metadata !"/Volumes/Data/Users/sabre/Desktop", metadata !2}
!2 = metadata !{i32 589841, i32 0, i32 16, metadata !"GSFusedSilica.m", metadata !"/Volumes/Data/Users/sabre/Desktop", metadata !"clang version 2.9 (trunk 115292)", i1 true, i1 false, metadata !"", i32 1} ; [ DW_TAG_compile_unit ]
!5 = metadata !{i32 589846, metadata !1, metadata !"CGRect", metadata !1, i32 49, i64 0, i64 0, i64 0, i32 0, null}
!23 = metadata !{i32 590081, metadata !0, metadata !"rect", metadata !1, i32 53, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
!24 = metadata !{i32 53, i32 33, metadata !0, null}