Refactor the code that creates the "dot-label" difference. This may be used in
more than one place. No intended functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89024 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfException.cpp b/lib/CodeGen/AsmPrinter/DwarfException.cpp
index 93cc012..1c8b8f4 100644
--- a/lib/CodeGen/AsmPrinter/DwarfException.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfException.cpp
@@ -74,6 +74,25 @@
return 0;
}
+/// CreateLabelDiff - Emit a label and subtract it from the expression we
+/// already have. This is equivalent to emitting "foo - .", but we have to emit
+/// the label for "." directly.
+const MCExpr *DwarfException::CreateLabelDiff(const MCExpr *ExprRef,
+ const char *LabelName,
+ unsigned Index) {
+ SmallString<64> Name;
+ raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
+ << LabelName << Asm->getFunctionNumber()
+ << "_" << Index;
+ MCSymbol *DotSym = Asm->OutContext.GetOrCreateSymbol(Name.str());
+ Asm->OutStreamer.EmitLabel(DotSym);
+
+ return MCBinaryExpr::CreateSub(ExprRef,
+ MCSymbolRefExpr::Create(DotSym,
+ Asm->OutContext),
+ Asm->OutContext);
+}
+
/// EmitCIE - Emit a Common Information Entry (CIE). This holds information that
/// is shared among many Frame Description Entries. There is at least one CIE
/// in every non-empty .debug_frame section.
@@ -176,24 +195,10 @@
// If there is a personality, we need to indicate the function's location.
if (PersonalityRef) {
- // If the reference to the personality function symbol is not already
- // pc-relative, then we need to subtract our current address from it. Do
- // this by emitting a label and subtracting it from the expression we
- // already have. This is equivalent to emitting "foo - .", but we have to
- // emit the label for "." directly.
- if (!IsPersonalityPCRel) {
- SmallString<64> Name;
- raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
- << "personalityref_addr" << Asm->getFunctionNumber() << "_" << Index;
- MCSymbol *DotSym = Asm->OutContext.GetOrCreateSymbol(Name.str());
- Asm->OutStreamer.EmitLabel(DotSym);
-
- PersonalityRef =
- MCBinaryExpr::CreateSub(PersonalityRef,
- MCSymbolRefExpr::Create(DotSym,Asm->OutContext),
- Asm->OutContext);
- }
-
+ if (!IsPersonalityPCRel)
+ PersonalityRef = CreateLabelDiff(PersonalityRef, "personalityref_addr",
+ Index);
+
O << MAI->getData32bitsDirective();
PersonalityRef->print(O, MAI);
Asm->EOL("Personality");