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Revert "[AIX] Return the correct set of callee saved regs" 

This reverts commit 6c881bf1fe.
This commit is contained in:
David Tenty 2020-04-20 13:00:26 -04:00
parent 78fe93030f
commit 28ae1969dc
2 changed files with 1 additions and 21 deletions
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11
llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp
View File

@ -142,8 +142,6 @@ const MCPhysReg*
PPCRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
const PPCSubtarget &Subtarget = MF->getSubtarget<PPCSubtarget>();
if (MF->getFunction().getCallingConv() == CallingConv::AnyReg) {
if (!TM.isPPC64() && Subtarget.isAIXABI())
report_fatal_error("AnyReg unimplemented on 32-bit AIX.");
if (Subtarget.hasVSX())
return CSR_64_AllRegs_VSX_SaveList;
if (Subtarget.hasAltivec())
@ -151,11 +149,8 @@ PPCRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
return CSR_64_AllRegs_SaveList;
}
if (TM.isPPC64() && MF->getInfo<PPCFunctionInfo>()->isSplitCSR()) {
if (Subtarget.isAIXABI())
report_fatal_error("SplitCSR unimplemented on AIX.");
if (TM.isPPC64() && MF->getInfo<PPCFunctionInfo>()->isSplitCSR())
return CSR_SRV464_TLS_PE_SaveList;
}
// On PPC64, we might need to save r2 (but only if it is not reserved).
// We do not need to treat R2 as callee-saved when using PC-Relative calls
@ -169,8 +164,6 @@ PPCRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
// Cold calling convention CSRs.
if (MF->getFunction().getCallingConv() == CallingConv::Cold) {
if (Subtarget.isAIXABI())
report_fatal_error("Cold calling unimplemented on AIX.");
if (TM.isPPC64()) {
if (Subtarget.hasAltivec())
return SaveR2 ? CSR_SVR64_ColdCC_R2_Altivec_SaveList
@ -193,8 +186,6 @@ PPCRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
return SaveR2 ? CSR_PPC64_R2_SaveList : CSR_PPC64_SaveList;
}
// 32-bit targets.
if (Subtarget.isAIXABI())
return CSR_AIX32_SaveList;
if (Subtarget.hasAltivec())
return CSR_SVR432_Altivec_SaveList;
else if (Subtarget.hasSPE())

11
llvm/test/CodeGen/PowerPC/aix-calleesavedregs.ll
View File

@ -1,11 +0,0 @@
; RUN: llc -verify-machineinstrs -mcpu=pwr4 -mattr=-altivec \
; RUN: -mtriple powerpc-ibm-aix-xcoff -O0 < %s | \
; RUN: FileCheck --check-prefixes=CHECK %s
define void @usethirteen() {
call void asm "nop", "~{r13}"()
ret void
}
; CHECK: stw 13, -4(1)
; CHECK: lwz 13, -4(1)