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A debug function start was not being recorded when the optimization level wasn't 

None. However, we were always recording the region end. There's no longer a good
reason for this code to be separated out between the different opt levels, as it
was doing pretty much the same thing anyway.

llvm-svn: 71370
This commit is contained in:
Bill Wendling 2009-05-09 23:51:35 +00:00
parent 1f991f09df
commit d53af35629
1 changed files with 32 additions and 56 deletions
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88
llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
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@ -3960,70 +3960,46 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
return 0;
MachineFunction &MF = DAG.getMachineFunction();
if (OptLevel == CodeGenOpt::None) {
// llvm.dbg.func.start implicitly defines a dbg_stoppoint which is what
// (most?) gdb expects.
DebugLoc PrevLoc = CurDebugLoc;
DISubprogram Subprogram(cast<GlobalVariable>(SP));
DICompileUnit CompileUnit = Subprogram.getCompileUnit();
if (!Subprogram.describes(MF.getFunction())) {
// This is a beginning of an inlined function.
// llvm.dbg.func.start implicitly defines a dbg_stoppoint which is what
// (most?) gdb expects.
DebugLoc PrevLoc = CurDebugLoc;
DISubprogram Subprogram(cast<GlobalVariable>(SP));
DICompileUnit CompileUnit = Subprogram.getCompileUnit();
// If llvm.dbg.func.start is seen in a new block before any
// llvm.dbg.stoppoint intrinsic then the location info is unknown.
// FIXME : Why DebugLoc is reset at the beginning of each block ?
if (PrevLoc.isUnknown())
return 0;
if (!Subprogram.describes(MF.getFunction())) {
// This is a beginning of an inlined function.
// Record the source line.
unsigned Line = Subprogram.getLineNumber();
setCurDebugLoc(DebugLoc::get(
MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
if (DW && DW->ShouldEmitDwarfDebug()) {
DebugLocTuple PrevLocTpl = MF.getDebugLocTuple(PrevLoc);
unsigned LabelID = DW->RecordInlinedFnStart(Subprogram,
DICompileUnit(PrevLocTpl.CompileUnit),
PrevLocTpl.Line,
PrevLocTpl.Col);
DAG.setRoot(DAG.getLabel(ISD::DBG_LABEL, getCurDebugLoc(),
getRoot(), LabelID));
}
} else {
// Record the source line.
unsigned Line = Subprogram.getLineNumber();
MF.setDefaultDebugLoc(DebugLoc::get(
MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
if (DW && DW->ShouldEmitDwarfDebug()) {
// llvm.dbg.func_start also defines beginning of function scope.
DW->RecordRegionStart(cast<GlobalVariable>(FSI.getSubprogram()));
}
}
} else {
DISubprogram Subprogram(cast<GlobalVariable>(SP));
std::string SPName;
Subprogram.getLinkageName(SPName);
if (!SPName.empty()
&& strcmp(SPName.c_str(), MF.getFunction()->getNameStart())) {
// This is beginning of inlined function. Debugging information for
// inlined function is not handled yet (only supported by FastISel).
// If llvm.dbg.func.start is seen in a new block before any
// llvm.dbg.stoppoint intrinsic then the location info is unknown.
// FIXME : Why DebugLoc is reset at the beginning of each block ?
if (PrevLoc.isUnknown())
return 0;
}
// llvm.dbg.func.start implicitly defines a dbg_stoppoint which is
// what (most?) gdb expects.
DICompileUnit CompileUnit = Subprogram.getCompileUnit();
// Record the source line but does not create a label for the normal
// function start. It will be emitted at asm emission time. However,
// create a label if this is a beginning of inlined function.
// Record the source line.
unsigned Line = Subprogram.getLineNumber();
setCurDebugLoc(DebugLoc::get(
MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
// FIXME - Start new region because llvm.dbg.func_start also defines
// beginning of function scope.
if (DW && DW->ShouldEmitDwarfDebug()) {
DebugLocTuple PrevLocTpl = MF.getDebugLocTuple(PrevLoc);
unsigned LabelID =
DW->RecordInlinedFnStart(Subprogram,
DICompileUnit(PrevLocTpl.CompileUnit),
PrevLocTpl.Line,
PrevLocTpl.Col);
DAG.setRoot(DAG.getLabel(ISD::DBG_LABEL, getCurDebugLoc(),
getRoot(), LabelID));
}
} else {
// Record the source line.
unsigned Line = Subprogram.getLineNumber();
MF.setDefaultDebugLoc(DebugLoc::get(
MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
if (DW && DW->ShouldEmitDwarfDebug()) {
// llvm.dbg.func_start also defines beginning of function scope.
DW->RecordRegionStart(cast<GlobalVariable>(FSI.getSubprogram()));
}
}
return 0;