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CodeGen: Error on redefinitions instead of asserting

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It's possible to have a prior definition of a symbol in module asm.
Raise an error instead of crashing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224828 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer
2014-12-24 23:06:55 +00:00
parent d36cad9914
commit e277a13a71
3 changed files with 28 additions and 4 deletions
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14
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@@ -338,6 +338,9 @@ void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
return;
GVSym->redefineIfPossible();
if (GVSym->isDefined() || GVSym->isVariable())
report_fatal_error("symbol '" + Twine(GVSym->getName()) +
"' is already defined");
if (MAI->hasDotTypeDotSizeDirective())
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject);
@@ -547,11 +550,14 @@ void AsmPrinter::EmitFunctionEntryLabel() {
// The function label could have already been emitted if two symbols end up
// conflicting due to asm renaming. Detect this and emit an error.
if (CurrentFnSym->isUndefined())
return OutStreamer.EmitLabel(CurrentFnSym);
if (CurrentFnSym->isVariable())
report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
"' is a protected alias");
if (CurrentFnSym->isDefined())
report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
"' label emitted multiple times to assembly file");
report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
"' label emitted multiple times to assembly file");
return OutStreamer.EmitLabel(CurrentFnSym);
}
/// emitComments - Pretty-print comments for instructions.