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Generate the DWARF stack frame decode operations in the function prologue for ARM/Thumb functions.

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Patch by Keith Walker!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201423 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Artyom Skrobov
2014-02-14 17:19:07 +00:00
parent 54136cad2e
commit e228078ca6
13 changed files with 1195 additions and 47 deletions
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18
lib/CodeGen/AsmPrinter/ARMException.cpp
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@ -37,7 +37,8 @@
using namespace llvm;
ARMException::ARMException(AsmPrinter *A)
: DwarfException(A) {}
: DwarfException(A),
shouldEmitCFI(false) {}
ARMException::~ARMException() {}
@ -46,7 +47,11 @@ ARMTargetStreamer &ARMException::getTargetStreamer() {
return static_cast<ARMTargetStreamer &>(TS);
}
/// endModule - Emit all exception information that should come after the
/// content.
void ARMException::endModule() {
if (shouldEmitCFI)
Asm->OutStreamer.EmitCFISections(false, true);
}
/// beginFunction - Gather pre-function exception information. Assumes it's
@ -56,11 +61,22 @@ void ARMException::beginFunction(const MachineFunction *MF) {
if (Asm->MF->getFunction()->needsUnwindTableEntry())
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
Asm->getFunctionNumber()));
// See if we need call frame info.
AsmPrinter::CFIMoveType MoveType = Asm->needsCFIMoves();
assert(MoveType != AsmPrinter::CFI_M_EH &&
"non-EH CFI not yet supported in prologue with EHABI lowering");
if (MoveType == AsmPrinter::CFI_M_Debug) {
shouldEmitCFI = true;
Asm->OutStreamer.EmitCFIStartProc(false);
}
}
/// endFunction - Gather and emit post-function exception information.
///
void ARMException::endFunction(const MachineFunction *) {
if (shouldEmitCFI)
Asm->OutStreamer.EmitCFIEndProc();
ARMTargetStreamer &ATS = getTargetStreamer();
if (!Asm->MF->getFunction()->needsUnwindTableEntry())
ATS.emitCantUnwind();