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[DebugInfo] Sink DwarfDebug::addCurrentFnArgument down into DwarfFile.

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Variable handling will be sunk into DwarfFile so that abstract variables
and the like can be shared across multiple CUs (to handle cross-CU
inlining, for example).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220453 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie
2014-10-23 00:16:05 +00:00
parent 22a01da9de
commit 87e9d8c051
3 changed files with 28 additions and 24 deletions
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23
lib/CodeGen/AsmPrinter/DwarfFile.cpp
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@ -70,6 +70,7 @@ void DwarfFile::emitUnits(const MCSymbol *ASectionSym) {
Asm->OutStreamer.EmitLabel(TheU->getLabelEnd());
}
}
// Compute the size and offset for each DIE.
void DwarfFile::computeSizeAndOffsets() {
// Offset from the first CU in the debug info section is 0 initially.
@ -155,4 +156,26 @@ void DwarfFile::emitStrings(const MCSection *StrSection,
const MCSection *OffsetSection) {
StrPool.emit(*Asm, StrSection, OffsetSection);
}
// If Var is a current function argument then add it to CurrentFnArguments list.
bool DwarfFile::addCurrentFnArgument(DbgVariable *Var, LexicalScope *Scope) {
if (Scope->getParent())
return false;
DIVariable DV = Var->getVariable();
if (DV.getTag() != dwarf::DW_TAG_arg_variable)
return false;
unsigned ArgNo = DV.getArgNumber();
if (ArgNo == 0)
return false;
auto &CurrentFnArguments = DD.getCurrentFnArguments();
// llvm::Function argument size is not good indicator of how many
// arguments does the function have at source level.
if (ArgNo > CurrentFnArguments.size())
CurrentFnArguments.resize(ArgNo * 2);
assert(!CurrentFnArguments[ArgNo - 1]);
CurrentFnArguments[ArgNo - 1] = Var;
return true;
}
}