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[Sparc] Set %o7 as the return address register instead of %i7 in MCRegisterInfo. Also, add CFI instructions to initialize the frame correctly.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200617 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Venkatraman Govindaraju 2014-02-01 18:54:16 +00:00
parent 991dd3bb92
commit eb97c0499b
3 changed files with 31 additions and 4 deletions
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25
lib/Target/Sparc/MCTargetDesc/SparcMCTargetDesc.cpp
View File

@ -33,6 +33,25 @@
using namespace llvm;
static MCAsmInfo *createSparcMCAsmInfo(const MCRegisterInfo &MRI,
StringRef TT) {
MCAsmInfo *MAI = new SparcELFMCAsmInfo(TT);
unsigned Reg = MRI.getDwarfRegNum(SP::O6, true);
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(0, Reg, 0);
MAI->addInitialFrameState(Inst);
return MAI;
}
static MCAsmInfo *createSparcV9MCAsmInfo(const MCRegisterInfo &MRI,
StringRef TT) {
MCAsmInfo *MAI = new SparcELFMCAsmInfo(TT);
unsigned Reg = MRI.getDwarfRegNum(SP::O6, true);
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(0, Reg, 2047);
MAI->addInitialFrameState(Inst);
return MAI;
}
static MCInstrInfo *createSparcMCInstrInfo() {
MCInstrInfo *X = new MCInstrInfo();
InitSparcMCInstrInfo(X);
@ -41,7 +60,7 @@ static MCInstrInfo *createSparcMCInstrInfo() {
static MCRegisterInfo *createSparcMCRegisterInfo(StringRef TT) {
MCRegisterInfo *X = new MCRegisterInfo();
InitSparcMCRegisterInfo(X, SP::I7);
InitSparcMCRegisterInfo(X, SP::O7);
return X;
}
@ -136,8 +155,8 @@ static MCInstPrinter *createSparcMCInstPrinter(const Target &T,
extern "C" void LLVMInitializeSparcTargetMC() {
// Register the MC asm info.
RegisterMCAsmInfo<SparcELFMCAsmInfo> X(TheSparcTarget);
RegisterMCAsmInfo<SparcELFMCAsmInfo> Y(TheSparcV9Target);
RegisterMCAsmInfoFn X(TheSparcTarget, createSparcMCAsmInfo);
RegisterMCAsmInfoFn Y(TheSparcV9Target, createSparcV9MCAsmInfo);
// Register the MC codegen info.
TargetRegistry::RegisterMCCodeGenInfo(TheSparcTarget,

2
lib/Target/Sparc/SparcRegisterInfo.cpp
View File

@ -35,7 +35,7 @@ ReserveAppRegisters("sparc-reserve-app-registers", cl::Hidden, cl::init(false),
cl::desc("Reserve application registers (%g2-%g4)"));
SparcRegisterInfo::SparcRegisterInfo(SparcSubtarget &st)
: SparcGenRegisterInfo(SP::I7), Subtarget(st) {
: SparcGenRegisterInfo(SP::O7), Subtarget(st) {
}
const uint16_t* SparcRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)

8
test/CodeGen/SPARC/exception.ll
View File

@ -56,7 +56,11 @@
; V8PIC_NOCFI-NEXT: .word _ZTIi
; V8PIC_NOCFI: .section .eh_frame
; V8PIC_NOCFI-NOT: .section
; V8PIC_NOCFI: .byte 15 ! CIE Return Address Column
; V8PIC_NOCFI: .word %r_disp32(DW.ref.__gxx_personality_v0)
; V8PIC_NOCFI: .byte 12 ! DW_CFA_def_cfa
; V8PIC_NOCFI: .byte 14 ! Reg 14
; V8PIC_NOCFI-NEXT: .byte 0 ! Offset 0
; V8PIC_NOCFI: .word %r_disp32(.Ltmp{{.+}}) ! FDE initial location
@ -94,7 +98,11 @@
; V9PIC_NOCFI-NEXT: .xword _ZTIi
; V9PIC_NOCFI: .section .eh_frame
; V9PIC_NOCFI-NOT: .section
; V9PIC_NOCFI: .byte 15 ! CIE Return Address Column
; V9PIC_NOCFI: .word %r_disp32(DW.ref.__gxx_personality_v0)
; V9PIC_NOCFI: .byte 12 ! DW_CFA_def_cfa
; V9PIC_NOCFI-NEXT: .byte 14 ! Reg 14
; V9PIC_NOCFI: .ascii "\377\017" ! Offset 2047
; V9PIC_NOCFI: .word %r_disp32(.Ltmp{{.+}}) ! FDE initial location
define i32 @main(i32 %argc, i8** nocapture readnone %argv) unnamed_addr #0 {