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Implement support to debug inlined functions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86748 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2009-11-10 23:06:00 +00:00
parent 0a26870d92
commit 53bb5c95af
14 changed files with 664 additions and 586 deletions
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lib/Transforms/Utils/CloneFunction.cpp
+56 -3
View File
@@ -20,6 +20,7 @@
#include "llvm/IntrinsicInst.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Function.h"
#include "llvm/LLVMContext.h"
#include "llvm/Support/CFG.h"
#include "llvm/Transforms/Utils/ValueMapper.h"
#include "llvm/Analysis/ConstantFolding.h"
@@ -346,6 +347,27 @@ ConstantFoldMappedInstruction(const Instruction *I) {
Ops.size(), TD);
}
static MDNode *UpdateInlinedAtInfo(MDNode *InsnMD, MDNode *TheCallMD,
LLVMContext &Context) {
DILocation ILoc(InsnMD);
if (ILoc.isNull()) return InsnMD;
DILocation CallLoc(TheCallMD);
if (CallLoc.isNull()) return InsnMD;
DILocation OrigLocation = ILoc.getOrigLocation();
MDNode *NewLoc = TheCallMD;
if (!OrigLocation.isNull())
NewLoc = UpdateInlinedAtInfo(OrigLocation.getNode(), TheCallMD, Context);
SmallVector<Value *, 4> MDVs;
MDVs.push_back(InsnMD->getElement(0)); // Line
MDVs.push_back(InsnMD->getElement(1)); // Col
MDVs.push_back(InsnMD->getElement(2)); // Scope
MDVs.push_back(NewLoc);
return MDNode::get(Context, MDVs.data(), MDVs.size());
}
/// CloneAndPruneFunctionInto - This works exactly like CloneFunctionInto,
/// except that it does some simple constant prop and DCE on the fly. The
/// effect of this is to copy significantly less code in cases where (for
@@ -358,7 +380,8 @@ void llvm::CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
SmallVectorImpl<ReturnInst*> &Returns,
const char *NameSuffix,
ClonedCodeInfo *CodeInfo,
const TargetData *TD) {
const TargetData *TD,
Instruction *TheCall) {
assert(NameSuffix && "NameSuffix cannot be null!");
#ifndef NDEBUG
@@ -397,19 +420,49 @@ void llvm::CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
// references as we go. This uses ValueMap to do all the hard work.
//
BasicBlock::iterator I = NewBB->begin();
LLVMContext &Context = OldFunc->getContext();
unsigned DbgKind = Context.getMetadata().getMDKind("dbg");
MDNode *TheCallMD = NULL;
SmallVector<Value *, 4> MDVs;
if (TheCall && TheCall->hasMetadata())
TheCallMD = Context.getMetadata().getMD(DbgKind, TheCall);
// Handle PHI nodes specially, as we have to remove references to dead
// blocks.
if (PHINode *PN = dyn_cast<PHINode>(I)) {
// Skip over all PHI nodes, remembering them for later.
BasicBlock::const_iterator OldI = BI->begin();
for (; (PN = dyn_cast<PHINode>(I)); ++I, ++OldI)
for (; (PN = dyn_cast<PHINode>(I)); ++I, ++OldI) {
if (I->hasMetadata())
if (TheCallMD) {
if (MDNode *IMD = Context.getMetadata().getMD(DbgKind, I)) {
MDNode *NewMD = UpdateInlinedAtInfo(IMD, TheCallMD, Context);
Context.getMetadata().addMD(DbgKind, NewMD, I);
}
} else
// The cloned instruction has dbg info but the call instruction
// does not have dbg info. Remove dbg info from cloned instruction.
Context.getMetadata().removeMD(DbgKind, I);
PHIToResolve.push_back(cast<PHINode>(OldI));
}
}
// Otherwise, remap the rest of the instructions normally.
for (; I != NewBB->end(); ++I)
for (; I != NewBB->end(); ++I) {
if (I->hasMetadata())
if (TheCallMD) {
if (MDNode *IMD = Context.getMetadata().getMD(DbgKind, I)) {
MDNode *NewMD = UpdateInlinedAtInfo(IMD, TheCallMD, Context);
Context.getMetadata().addMD(DbgKind, NewMD, I);
}
} else
// The cloned instruction has dbg info but the call instruction
// does not have dbg info. Remove dbg info from cloned instruction.
Context.getMetadata().removeMD(DbgKind, I);
RemapInstruction(I, ValueMap);
}
}
// Defer PHI resolution until rest of function is resolved, PHI resolution