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Use frameindex, if available, as a last resort to emit debug info for a parameter.

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llvm-svn: 118020
This commit is contained in:
Devang Patel 2010-11-02 17:01:30 +00:00
parent 47a8976f28
commit efd9ac540a
2 changed files with 48 additions and 2 deletions
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15
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
View File

@ -3944,6 +3944,9 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
return false;
MachineFunction &MF = DAG.getMachineFunction();
const TargetInstrInfo *TII = DAG.getTarget().getInstrInfo();
const TargetRegisterInfo *TRI = DAG.getTarget().getRegisterInfo();
// Ignore inlined function arguments here.
DIVariable DV(Variable);
if (DV.isInlinedFnArgument(MF.getFunction()))
@ -3957,7 +3960,6 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
if (Arg->hasByValAttr()) {
// Byval arguments' frame index is recorded during argument lowering.
// Use this info directly.
const TargetRegisterInfo *TRI = DAG.getTarget().getRegisterInfo();
Reg = TRI->getFrameRegister(MF);
Offset = FuncInfo.getByValArgumentFrameIndex(Arg);
// If byval argument ofset is not recorded then ignore this.
@ -3976,13 +3978,22 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
}
if (!Reg) {
// Check if ValueMap has reg number.
DenseMap<const Value *, unsigned>::iterator VMI = FuncInfo.ValueMap.find(V);
if (VMI == FuncInfo.ValueMap.end())
return false;
Reg = VMI->second;
}
const TargetInstrInfo *TII = DAG.getTarget().getInstrInfo();
if (!Reg && N.getNode())
// Check if frame index is available.
if (LoadSDNode *LNode = dyn_cast<LoadSDNode>(N.getNode()))
if (FrameIndexSDNode *FINode =
dyn_cast<FrameIndexSDNode>(LNode->getBasePtr().getNode())) {
Reg = TRI->getFrameRegister(MF);
Offset = FINode->getIndex();
}
MachineInstrBuilder MIB = BuildMI(MF, getCurDebugLoc(),
TII->get(TargetOpcode::DBG_VALUE))
.addReg(Reg, RegState::Debug).addImm(Offset).addMetadata(Variable);

35
test/CodeGen/X86/2010-11-02-DbgParameter.ll Normal file
View File

@ -0,0 +1,35 @@
; RUN: llc -O2 -asm-verbose < %s | FileCheck %s
; Radar 8616981
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
target triple = "i386-apple-darwin11.0.0"
%struct.bar = type { i32, i32 }
define i32 @foo(%struct.bar* nocapture %i) nounwind readnone optsize noinline ssp {
; CHECK: TAG_formal_parameter
entry:
tail call void @llvm.dbg.value(metadata !{%struct.bar* %i}, i64 0, metadata !6), !dbg !12
ret i32 1, !dbg !13
}
declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
!llvm.dbg.sp = !{!0}
!llvm.dbg.lv.foo = !{!6}
!0 = metadata !{i32 589870, i32 0, metadata !1, metadata !"foo", metadata !"foo", metadata !"", metadata !1, i32 3, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 (%struct.bar*)* @foo} ; [ DW_TAG_subprogram ]
!1 = metadata !{i32 589865, metadata !"one.c", metadata !"/private/tmp", metadata !2} ; [ DW_TAG_file_type ]
!2 = metadata !{i32 589841, i32 0, i32 12, metadata !"one.c", metadata !"/private/tmp", metadata !"clang version 2.9 (trunk 117922)", i1 true, i1 true, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
!3 = metadata !{i32 589845, metadata !1, metadata !"", metadata !1, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !4, i32 0, null} ; [ DW_TAG_subroutine_type ]
!4 = metadata !{metadata !5}
!5 = metadata !{i32 589860, metadata !2, metadata !"int", metadata !1, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
!6 = metadata !{i32 590081, metadata !0, metadata !"i", metadata !1, i32 3, metadata !7, i32 0} ; [ DW_TAG_arg_variable ]
!7 = metadata !{i32 589839, metadata !1, metadata !"", metadata !1, i32 0, i64 32, i64 32, i64 0, i32 0, metadata !8} ; [ DW_TAG_pointer_type ]
!8 = metadata !{i32 589843, metadata !1, metadata !"bar", metadata !1, i32 2, i64 64, i64 32, i64 0, i32 0, null, metadata !9, i32 0, null} ; [ DW_TAG_structure_type ]
!9 = metadata !{metadata !10, metadata !11}
!10 = metadata !{i32 589837, metadata !1, metadata !"x", metadata !1, i32 2, i64 32, i64 32, i64 0, i32 0, metadata !5} ; [ DW_TAG_member ]
!11 = metadata !{i32 589837, metadata !1, metadata !"y", metadata !1, i32 2, i64 32, i64 32, i64 32, i32 0, metadata !5} ; [ DW_TAG_member ]
!12 = metadata !{i32 3, i32 47, metadata !0, null}
!13 = metadata !{i32 4, i32 2, metadata !14, null}
!14 = metadata !{i32 589835, metadata !0, i32 3, i32 50, metadata !1, i32 0} ; [ DW_TAG_lexical_block ]