Add 129518 back with a fix for when we are producing eh just because of debug info.
Change ELF systems to use CFI for producing the EH tables. This reduces the
size of the clang binary in Debug builds from 690MB to 679MB.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129571 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 3d3abc2..baf11a7 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -33,6 +33,7 @@
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
@@ -624,6 +625,45 @@
return true;
}
+void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
+ MCSymbol *Label = MI.getOperand(0).getMCSymbol();
+ if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI) {
+ OutStreamer.EmitLabel(Label);
+ return;
+ }
+
+ const MachineFunction &MF = *MI.getParent()->getParent();
+ MachineModuleInfo &MMI = MF.getMMI();
+ std::vector<MachineMove> &Moves = MMI.getFrameMoves();
+ const MachineMove *Move = NULL;
+ for (std::vector<MachineMove>::iterator I = Moves.begin(),
+ E = Moves.end(); I != E; ++I) {
+ if (I->getLabel() == Label) {
+ Move = &*I;
+ break;
+ }
+ }
+ assert(Move);
+
+ const MachineLocation &Dst = Move->getDestination();
+ const MachineLocation &Src = Move->getSource();
+ const TargetAsmInfo &AsmInfo = OutContext.getTargetAsmInfo();
+ if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
+ if (Src.getReg() == MachineLocation::VirtualFP)
+ OutStreamer.EmitCFIDefCfaOffset(-Src.getOffset());
+ else {
+ unsigned Reg = AsmInfo.getDwarfRegNum(Src.getReg(), true);
+ OutStreamer.EmitCFIDefCfa(Reg, -Src.getOffset());
+ }
+ } else if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) {
+ unsigned Reg = AsmInfo.getDwarfRegNum(Dst.getReg(), true);
+ OutStreamer.EmitCFIDefCfaRegister(Reg);
+ } else {
+ unsigned Reg = AsmInfo.getDwarfRegNum(Src.getReg(), true);
+ OutStreamer.EmitCFIOffset(Reg, -Dst.getOffset());
+ }
+}
+
/// EmitFunctionBody - This method emits the body and trailer for a
/// function.
void AsmPrinter::EmitFunctionBody() {
@@ -660,6 +700,9 @@
switch (II->getOpcode()) {
case TargetOpcode::PROLOG_LABEL:
+ emitPrologLabel(*II);
+ break;
+
case TargetOpcode::EH_LABEL:
case TargetOpcode::GC_LABEL:
OutStreamer.EmitLabel(II->getOperand(0).getMCSymbol());