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Let FE mark a variable as artificial variable.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115102 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-09-29 23:07:21 +00:00
parent e487b017e9
commit 3cf763dc7a
3 changed files with 18 additions and 4 deletions
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10
include/llvm/Analysis/DebugInfo.h
View File

@ -501,6 +501,13 @@ namespace llvm {
}
unsigned getLineNumber() const { return getUnsignedField(4); }
DIType getType() const { return getFieldAs<DIType>(5); }
/// isArtificial - Return true if this variable is marked as "artificial".
bool isArtificial() const {
if (getVersion() <= llvm::LLVMDebugVersion8)
return false;
return (getUnsignedField(6) & FlagArtificial) != 0;
}
/// Verify - Verify that a variable descriptor is well formed.
@ -738,7 +745,8 @@ namespace llvm {
DIVariable CreateVariable(unsigned Tag, DIDescriptor Context,
StringRef Name,
DIFile F, unsigned LineNo,
DIType Ty, bool AlwaysPreserve = false);
DIType Ty, bool AlwaysPreserve = false,
unsigned Flags = 0);
/// CreateComplexVariable - Create a new descriptor for the specified
/// variable which has a complex address expression for its address.

10
lib/Analysis/DebugInfo.cpp
View File

@ -109,7 +109,9 @@ Function *DIDescriptor::getFunctionField(unsigned Elt) const {
}
unsigned DIVariable::getNumAddrElements() const {
return DbgNode->getNumOperands()-6;
if (getVersion() <= llvm::LLVMDebugVersion8)
return DbgNode->getNumOperands()-6;
return DbgNode->getNumOperands()-7;
}
@ -1145,7 +1147,8 @@ DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
StringRef Name,
DIFile F,
unsigned LineNo,
DIType Ty, bool AlwaysPreserve) {
DIType Ty, bool AlwaysPreserve,
unsigned Flags) {
Value *Elts[] = {
GetTagConstant(Tag),
Context,
@ -1153,8 +1156,9 @@ DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
F,
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
Ty,
ConstantInt::get(Type::getInt32Ty(VMContext), Flags)
};
MDNode *Node = MDNode::get(VMContext, &Elts[0], 6);
MDNode *Node = MDNode::get(VMContext, &Elts[0], 7);
if (AlwaysPreserve) {
// The optimizer may remove local variable. If there is an interest
// to preserve variable info in such situation then stash it in a

2
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1624,6 +1624,8 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) {
if (Tag == dwarf::DW_TAG_formal_parameter && DV->getType().isArtificial())
addUInt(VariableDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
else if (DIVariable(DV->getVariable()).isArtificial())
addUInt(VariableDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
if (Scope->isAbstractScope()) {
DV->setDIE(VariableDie);