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Emit correct register move information in eh frames for X86. This allows Shootout-C++/except to pass on x86/linux

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with non-llvm-compiled (e.g. "native") unwind runtime.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36647 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2007-05-02 19:53:33 +00:00
parent 038082d966
commit ce3b46552a
2 changed files with 56 additions and 8 deletions
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13
lib/Target/X86/X86ISelLowering.cpp
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@ -226,6 +226,19 @@ X86TargetLowering::X86TargetLowering(TargetMachine &TM)
!Subtarget->isTargetCygMing())
setOperationAction(ISD::LABEL, MVT::Other, Expand);
setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
if (Subtarget->is64Bit()) {
// FIXME: Verify
setExceptionPointerRegister(X86::RAX);
setExceptionSelectorRegister(X86::RDX);
} else {
setExceptionPointerRegister(X86::EAX);
setExceptionSelectorRegister(X86::EDX);
}
// VASTART needs to be custom lowered to use the VarArgsFrameIndex
setOperationAction(ISD::VASTART , MVT::Other, Custom);
setOperationAction(ISD::VAARG , MVT::Other, Expand);

51
lib/Target/X86/X86RegisterInfo.cpp
View File

@ -26,6 +26,7 @@
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineLocation.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
@ -1060,11 +1061,17 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
MachineModuleInfo *MMI = MFI->getMachineModuleInfo();
// Prepare for frame info.
unsigned FrameLabelId = 0;
unsigned FrameLabelId = 0, StartLabelId = 0;
// Get the number of bytes to allocate from the FrameInfo
uint64_t NumBytes = MFI->getStackSize();
if (MMI && MMI->needsFrameInfo()) {
// Mark function start
StartLabelId = MMI->NextLabelID();
BuildMI(MBB, MBBI, TII.get(X86::LABEL)).addImm(StartLabelId);
}
if (NumBytes) { // adjust stack pointer: ESP -= numbytes
if (NumBytes >= 4096 && Subtarget->isTargetCygMing()) {
// Check, whether EAX is livein for this function
@ -1138,17 +1145,38 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
if (MMI && MMI->needsFrameInfo()) {
std::vector<MachineMove> &Moves = MMI->getFrameMoves();
const TargetAsmInfo *TAI = MF.getTarget().getTargetAsmInfo();
// Calculate amount of bytes used for return address storing
int stackGrowth =
(MF.getTarget().getFrameInfo()->getStackGrowthDirection() ==
TargetFrameInfo::StackGrowsUp ?
TAI->getAddressSize() : -TAI->getAddressSize());
// Add return address to move list
MachineLocation CSDst(StackPtr, stackGrowth);
MachineLocation CSSrc(getRARegister());
Moves.push_back(MachineMove(StartLabelId, CSDst, CSSrc));
if (NumBytes) {
// Show update of SP.
MachineLocation SPDst(MachineLocation::VirtualFP);
MachineLocation SPSrc(MachineLocation::VirtualFP, -NumBytes);
Moves.push_back(MachineMove(FrameLabelId, SPDst, SPSrc));
if (hasFP(MF)) {
// Adjust SP
MachineLocation SPDst(MachineLocation::VirtualFP);
MachineLocation SPSrc(MachineLocation::VirtualFP, 2*stackGrowth);
Moves.push_back(MachineMove(FrameLabelId, SPDst, SPSrc));
} else {
MachineLocation SPDst(MachineLocation::VirtualFP);
MachineLocation SPSrc(MachineLocation::VirtualFP, -NumBytes+stackGrowth);
Moves.push_back(MachineMove(FrameLabelId, SPDst, SPSrc));
}
} else {
MachineLocation SP(StackPtr);
Moves.push_back(MachineMove(FrameLabelId, SP, SP));
//FIXME: Verify & implement for FP
MachineLocation SPDst(StackPtr);
MachineLocation SPSrc(StackPtr, stackGrowth);
Moves.push_back(MachineMove(FrameLabelId, SPDst, SPSrc));
}
// Add callee saved registers to move list.
const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
for (unsigned I = 0, E = CSI.size(); I != E; ++I) {
@ -1162,6 +1190,13 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
// Mark effective beginning of when frame pointer is ready.
unsigned ReadyLabelId = MMI->NextLabelID();
BuildMI(MBB, MBBI, TII.get(X86::LABEL)).addImm(ReadyLabelId);
if (hasFP(MF)) {
// Save FP
MachineLocation FPDst(MachineLocation::VirtualFP, 2*stackGrowth);
MachineLocation FPSrc(FramePtr);
Moves.push_back(MachineMove(ReadyLabelId, FPDst, FPSrc));
}
MachineLocation FPDst(hasFP(MF) ? FramePtr : StackPtr);
MachineLocation FPSrc(MachineLocation::VirtualFP);