diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp --- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp @@ -6307,11 +6307,6 @@ const Align PtrAlign = IsPPC64 ? Align(8) : Align(4); const MVT RegVT = IsPPC64 ? MVT::i64 : MVT::i32; - if (ValVT.isVector() && !State.getMachineFunction() - .getTarget() - .Options.EnableAIXExtendedAltivecABI) - report_fatal_error("the default Altivec AIX ABI is not yet supported"); - if (ValVT == MVT::f128) report_fatal_error("f128 is unimplemented on AIX."); @@ -15327,6 +15322,15 @@ R.first = PPC::CR0; R.second = &PPC::CRRCRegClass; } + // FIXME: This warning should ideally be emitted in the front end. + const auto &TM = getTargetMachine(); + if (Subtarget.isAIXABI() && !TM.getAIXExtendedAltivecABI()) { + if (((R.first >= PPC::V20 && R.first <= PPC::V31) || + (R.first >= PPC::VF20 && R.first <= PPC::VF31)) && + (R.second == &PPC::VSRCRegClass || R.second == &PPC::VSFRCRegClass)) + errs() << "warning: vector registers 20 to 32 are reserved in the " + "default AIX AltiVec ABI and cannot be used\n"; + } return R; } diff --git a/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp b/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp --- a/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp +++ b/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp @@ -156,10 +156,6 @@ const MCPhysReg* PPCRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const { const PPCSubtarget &Subtarget = MF->getSubtarget(); - if (Subtarget.isAIXABI() && - (Subtarget.hasAltivec() && !TM.getAIXExtendedAltivecABI())) - report_fatal_error("the default AIX Altivec ABI is not yet " - "supported."); if (MF->getFunction().getCallingConv() == CallingConv::AnyReg) { if (!TM.isPPC64() && Subtarget.isAIXABI()) report_fatal_error("AnyReg unimplemented on 32-bit AIX."); @@ -200,15 +196,18 @@ } // Standard calling convention CSRs. if (TM.isPPC64()) { - if (Subtarget.hasAltivec()) + if (Subtarget.hasAltivec() && + (!Subtarget.isAIXABI() || TM.getAIXExtendedAltivecABI())) { return SaveR2 ? CSR_PPC64_R2_Altivec_SaveList : CSR_PPC64_Altivec_SaveList; + } return SaveR2 ? CSR_PPC64_R2_SaveList : CSR_PPC64_SaveList; } // 32-bit targets. if (Subtarget.isAIXABI()) { if (Subtarget.hasAltivec()) - return CSR_AIX32_Altivec_SaveList; + return TM.getAIXExtendedAltivecABI() ? CSR_AIX32_Altivec_SaveList + : CSR_AIX32_SaveList; return CSR_AIX32_SaveList; } if (Subtarget.hasAltivec()) @@ -231,10 +230,13 @@ } if (Subtarget.isAIXABI()) { - return TM.isPPC64() ? (Subtarget.hasAltivec() ? CSR_PPC64_Altivec_RegMask - : CSR_PPC64_RegMask) - : (Subtarget.hasAltivec() ? CSR_AIX32_Altivec_RegMask - : CSR_AIX32_RegMask); + return TM.isPPC64() + ? ((Subtarget.hasAltivec() && TM.getAIXExtendedAltivecABI()) + ? CSR_PPC64_Altivec_RegMask + : CSR_PPC64_RegMask) + : ((Subtarget.hasAltivec() && TM.getAIXExtendedAltivecABI()) + ? CSR_AIX32_Altivec_RegMask + : CSR_AIX32_RegMask); } if (CC == CallingConv::Cold) { @@ -335,6 +337,17 @@ IE = PPC::VRRCRegClass.end(); I != IE; ++I) markSuperRegs(Reserved, *I); + if (Subtarget.isAIXABI() && Subtarget.hasAltivec() && + !TM.getAIXExtendedAltivecABI()) { + // In the AIX default Altivec ABI, vector registers VR20-VR31 are reserved + // and cannot be used. + for (auto Reg : CSR_Altivec_SaveList) { + if (Reg == 0) + break; + markSuperRegs(Reserved, Reg); + } + } + assert(checkAllSuperRegsMarked(Reserved)); return Reserved; } @@ -426,15 +439,28 @@ unsigned FP = TFI->hasFP(MF) ? 1 : 0; return 32 - FP - DefaultSafety; } - case PPC::F8RCRegClassID: case PPC::F4RCRegClassID: - case PPC::VRRCRegClassID: - case PPC::VFRCRegClassID: + case PPC::F8RCRegClassID: case PPC::VSLRCRegClassID: return 32 - DefaultSafety; - case PPC::VSRCRegClassID: + case PPC::VFRCRegClassID: + case PPC::VRRCRegClassID: { + const PPCSubtarget &Subtarget = MF.getSubtarget(); + // Vector registers VR20-VR31 are reserved and cannot be used in the default + // Altivec ABI on AIX. + if (!TM.getAIXExtendedAltivecABI() && Subtarget.isAIXABI()) + return 20 - DefaultSafety; + } + return 32 - DefaultSafety; case PPC::VSFRCRegClassID: case PPC::VSSRCRegClassID: + case PPC::VSRCRegClassID: { + const PPCSubtarget &Subtarget = MF.getSubtarget(); + if (!TM.getAIXExtendedAltivecABI() && Subtarget.isAIXABI()) + // Vector registers VR20-VR31 are reserved and cannot be used in the + // default Altivec ABI on AIX. + return 52 - DefaultSafety; + } return 64 - DefaultSafety; case PPC::CRRCRegClassID: return 8 - DefaultSafety; diff --git a/llvm/test/CodeGen/PowerPC/aix-csr-vector.ll b/llvm/test/CodeGen/PowerPC/aix-csr-vector.ll new file mode 100644 --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/aix-csr-vector.ll @@ -0,0 +1,201 @@ +; RUN: llc -mtriple=powerpc-unknown-aix-xcoff -verify-machineinstrs -mcpu=pwr7 \ +; RUN: -mattr=+altivec -stop-after=prologepilog < %s | \ +; RUN: FileCheck --check-prefix=MIR32 %s + +; RUN: llc -mtriple=powerpc-unknown-aix-xcoff -verify-machineinstrs \ +; RUN: -mcpu=pwr7 -mattr=+altivec < %s | \ +; RUN: FileCheck --check-prefix=ASM32 %s + +; RUN: llc -mtriple=powerpc64-unknown-aix-xcoff -verify-machineinstrs \ +; RUN: -mcpu=pwr7 -mattr=+altivec -stop-after=prologepilog < %s | \ +; RUN: FileCheck --check-prefix=MIR64 %s + +; RUN: llc -mtriple=powerpc64-unknown-aix-xcoff -verify-machineinstrs \ +; RUN: -mcpu=pwr7 -mattr=+altivec < %s | \ +; RUN: FileCheck --check-prefix=ASM64 %s + +define dso_local void @vec_regs() { + entry: + call void asm sideeffect "", "~{v13},~{v20},~{v26},~{v31}"() + ret void +} + +; MIR32-LABEL: name: vec_regs + +; MIR32: fixedStack: [] +; MIR32-NOT: STXVD2X killed $v20 +; MIR32-NOT: STXVD2X killed $v26 +; MIR32-NOT: STXVD2X killed $v31 +; MIR32-LABEL: INLINEASM +; MIR32-NOT: $v20 = LXVD2X +; MIR32-NOT: $v26 = LXVD2X +; MIR32-NOT: $v31 = LXVD2X +; MIR32: BLR implicit $lr, implicit $rm + +; MIR64-LABEL: name: vec_regs + +; MIR64: fixedStack: [] +; MIR64-NOT: STXVD2X killed $v20 +; MIR64-NOT: STXVD2X killed $v26 +; MIR64-NOT: STXVD2X killed $v31 +; MIR64-LABEL: INLINEASM +; MIR64-NOT: $v20 = LXVD2X +; MIR64-NOT: $v26 = LXVD2X +; MIR64-NOT: $v31 = LXVD2X +; MIR64: BLR8 implicit $lr8, implicit $rm + +; ASM32-LABEL: .vec_regs: + +; ASM32-NOT: 20 +; ASM32-NOT: 26 +; ASM32-NOT: 31 +; ASM32-DAG: #APP +; ASM32-DAG: #NO_APP +; ASM32: blr + +; ASM64-LABEL: .vec_regs: + +; ASM64-NOT: 20 +; ASM64-NOT: 26 +; ASM64-NOT: 31 +; ASM64-DAG: #APP +; ASM64-DAG: #NO_APP +; ASM64: blr + +define dso_local void @fprs_gprs_vecregs() { + call void asm sideeffect "", "~{r14},~{r25},~{r31},~{f14},~{f21},~{f31},~{v20},~{v26},~{v31}"() + ret void +} + +; MIR32-LABEL: name: fprs_gprs_vecregs + +; MIR32: fixedStack: + +; MIR32: liveins: $r14, $r25, $r31, $f14, $f21, $f31 + +; MIR32-NOT: STXVD2X killed $v20 +; MIR32-NOT: STXVD2X killed $v26 +; MIR32-NOT: STXVD2X killed $v31 +; MIR32-DAG: STW killed $r14, -216, $r1 :: (store 4 into %fixed-stack.5, align 8) +; MIR32-DAG: STW killed $r25, -172, $r1 :: (store 4 into %fixed-stack.4) +; MIR32-DAG: STW killed $r31, -148, $r1 :: (store 4 into %fixed-stack.3) +; MIR32-DAG: STFD killed $f14, -144, $r1 :: (store 8 into %fixed-stack.2, align 16) +; MIR32-DAG: STFD killed $f21, -88, $r1 :: (store 8 into %fixed-stack.1) +; MIR32-DAG: STFD killed $f31, -8, $r1 :: (store 8 into %fixed-stack.0) + +; MIR32-LABEL: INLINEASM + +; MIR32-NOT: $v20 = LXVD2X +; MIR32-NOT: $v26 = LXVD2X +; MIR32-NOT: $v31 = LXVD2X +; MIR32-DAG: $r14 = LWZ -216, $r1 :: (load 4 from %fixed-stack.5, align 8) +; MIR32-DAG: $r25 = LWZ -172, $r1 :: (load 4 from %fixed-stack.4) +; MIR32-DAG: $r31 = LWZ -148, $r1 :: (load 4 from %fixed-stack.3) +; MIR32-DAG: $f14 = LFD -144, $r1 :: (load 8 from %fixed-stack.2, align 16) +; MIR32-DAG: $f21 = LFD -88, $r1 :: (load 8 from %fixed-stack.1) +; MIR32-DAG: $f31 = LFD -8, $r1 :: (load 8 from %fixed-stack.0) +; MIR32-DAG: BLR implicit $lr, implicit $rm + +; MIR64-LABEL: name: fprs_gprs_vecregs + +; MIR64: fixedStack: + +; MIR64: liveins: $x14, $x25, $x31, $f14, $f21, $f31 + +; MIR64-NOT: STXVD2X killed $v20 +; MIR64-NOT: STXVD2X killed $v26 +; MIR64-NOT: STXVD2X killed $v31 +; MIR64-DAG: STD killed $x14, -288, $x1 :: (store 8 into %fixed-stack.5, align 16) +; MIR64-DAG: STD killed $x25, -200, $x1 :: (store 8 into %fixed-stack.4) +; MIR64-DAG: STD killed $x31, -152, $x1 :: (store 8 into %fixed-stack.3) +; MIR64-DAG: STFD killed $f14, -144, $x1 :: (store 8 into %fixed-stack.2, align 16) +; MIR64-DAG: STFD killed $f21, -88, $x1 :: (store 8 into %fixed-stack.1) +; MIR64-DAG: STFD killed $f31, -8, $x1 :: (store 8 into %fixed-stack.0) + +; MIR64-LABEL: INLINEASM + +; MIR64-NOT: $v20 = LXVD2X +; MIR64-NOT: $v26 = LXVD2X +; MIR64-NOT: $v31 = LXVD2X +; MIR64-DAG: $x14 = LD -288, $x1 :: (load 8 from %fixed-stack.5, align 16) +; MIR64-DAG: $x25 = LD -200, $x1 :: (load 8 from %fixed-stack.4) +; MIR64-DAG: $x31 = LD -152, $x1 :: (load 8 from %fixed-stack.3) +; MIR64-DAG: $f14 = LFD -144, $x1 :: (load 8 from %fixed-stack.2, align 16) +; MIR64-DAG: $f21 = LFD -88, $x1 :: (load 8 from %fixed-stack.1) +; MIR64-DAG: $f31 = LFD -8, $x1 :: (load 8 from %fixed-stack.0) +; MIR64: BLR8 implicit $lr8, implicit $rm + +;; We don't have -ppc-full-reg-names on AIX so can't reliably check-not for +;; only vector registers numbers in this case. + +; ASM32-LABEL: .fprs_gprs_vecregs: + +; ASM32-DAG: stw 14, -216(1) # 4-byte Folded Spill +; ASM32-DAG: stw 25, -172(1) # 4-byte Folded Spill +; ASM32-DAG: stw 31, -148(1) # 4-byte Folded Spill +; ASM32-DAG: stfd 14, -144(1) # 8-byte Folded Spill +; ASM32-DAG: stfd 21, -88(1) # 8-byte Folded Spill +; ASM32-DAG: stfd 31, -8(1) # 8-byte Folded Spill +; ASM32-DAG: #APP +; ASM32-DAG: #NO_APP +; ASM32-DAG: lfd 31, -8(1) # 8-byte Folded Reload +; ASM32-DAG: lfd 21, -88(1) # 8-byte Folded Reload +; ASM32-DAG: lfd 14, -144(1) # 8-byte Folded Reload +; ASM32-DAG: lwz 31, -148(1) # 4-byte Folded Reload +; ASM32-DAG: lwz 25, -172(1) # 4-byte Folded Reload +; ASM32-DAG: lwz 14, -216(1) # 4-byte Folded Reload +; ASM32: blr + +; ASM64-LABEL .fprs_gprs_vecregs: + +; ASM64-DAG: std 14, -288(1) # 8-byte Folded Spill +; ASM64-DAG: std 25, -200(1) # 8-byte Folded Spill +; ASM64-DAG: std 31, -152(1) # 8-byte Folded Spill +; ASM64-DAG: stfd 14, -144(1) # 8-byte Folded Spill +; ASM64-DAG: stfd 21, -88(1) # 8-byte Folded Spill +; ASM64-DAG: stfd 31, -8(1) # 8-byte Folded Spill +; ASM64-DAG: #APP +; ASM64-DAG: #NO_APP +; ASM64-DAG: lfd 31, -8(1) # 8-byte Folded Reload +; ASM64-DAG: lfd 21, -88(1) # 8-byte Folded Reload +; ASM64-DAG: lfd 14, -144(1) # 8-byte Folded Reload +; ASM64-DAG: ld 31, -152(1) # 8-byte Folded Reload +; ASM64-DAG: ld 25, -200(1) # 8-byte Folded Reload +; ASM64-DAG: ld 14, -288(1) # 8-byte Folded Reload +; ASM64: blr + +define dso_local void @all_fprs_and_vecregs() { + call void asm sideeffect "", "~{f0},~{f1},~{f2},~{f3},~{f4},~{f5},~{f6},~{f7},~{f8},~{f9},~{f10},~{f12},~{f13},~{f14},~{f15},~{f16},~{f17},~{f18},~{f19},~{f20},~{f21},~{f22},~{f23},~{f24},~{f25},~{f26},~{f27},~{f28},~{f29},~{f30},~{f31},~{v0},~{v1},~{v2},~{v3},~{v4},~{v5},~{v6}~{v7},~{v8},~{v9},~{v10},~{v11},~{v12},~{v13},~{v14},~{v15},~{v16},~{v17},~{v18},~{v19}"() + ret void +} + +;; Check that reserved vectors are not used. +; MIR32-LABEL: all_fprs_and_vecregs + +; MIR32-NOT: $v20 +; MIR32-NOT: $v21 +; MIR32-NOT: $v22 +; MIR32-NOT: $v23 +; MIR32-NOT: $v24 +; MIR32-NOT: $v25 +; MIR32-NOT: $v26 +; MIR32-NOT: $v27 +; MIR32-NOT: $v28 +; MIR32-NOT: $v29 +; MIR32-NOT: $v30 +; MIR32-NOT: $v31 + +; MIR64-LABEL: all_fprs_and_vecregs + +; MIR64-NOT: $v20 +; MIR64-NOT: $v21 +; MIR64-NOT: $v22 +; MIR64-NOT: $v23 +; MIR64-NOT: $v24 +; MIR64-NOT: $v25 +; MIR64-NOT: $v26 +; MIR64-NOT: $v27 +; MIR64-NOT: $v28 +; MIR64-NOT: $v29 +; MIR64-NOT: $v30 +; MIR64-NOT: $v31 diff --git a/llvm/test/CodeGen/PowerPC/aix-inlineasm-reserved-reg-dflt-warn.ll b/llvm/test/CodeGen/PowerPC/aix-inlineasm-reserved-reg-dflt-warn.ll new file mode 100644 --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/aix-inlineasm-reserved-reg-dflt-warn.ll @@ -0,0 +1,14 @@ +; RUN: llc < %s -mtriple=powerpc-unknown-aix-xcoff -verify-machineinstrs \ +; RUN: -mcpu=pwr7 -mattr=+altivec 2>&1 | \ +; RUN: FileCheck --check-prefix=DFLTWRN %s + +; RUN: llc < %s -mtriple=powerpc64-unknown-aix-xcoff -verify-machineinstrs \ +; RUN: -mcpu=pwr7 -mattr=+altivec 2>&1 | \ +; RUN: FileCheck --check-prefix=DFLTWRN %s +define dso_local void @vec_warn() { +entry: + call void asm sideeffect "", "~{v23}"() + ret void +} + +; DFLTWRN: warning: vector registers 20 to 32 are reserved in the default AIX AltiVec ABI and cannot be used diff --git a/llvm/test/CodeGen/PowerPC/aix-vec-abi.ll b/llvm/test/CodeGen/PowerPC/aix-vec-abi.ll deleted file mode 100644 --- a/llvm/test/CodeGen/PowerPC/aix-vec-abi.ll +++ /dev/null @@ -1,8 +0,0 @@ -; RUN: not --crash llc < %s -mtriple powerpc64-ibm-aix-xcoff -mcpu=pwr8 2>&1 | FileCheck %s --check-prefix=DFLTERROR -; RUN: not --crash llc < %s -mtriple powerpc-ibm-aix-xcoff -mcpu=pwr8 2>&1 | FileCheck %s --check-prefix=DFLTERROR - -define void @vec_callee(<4 x i32> %vec1) { - ret void -} - -; DFLTERROR: LLVM ERROR: the default Altivec AIX ABI is not yet supported