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Index: llvm-toolchain-snapshot_17~++20230517015648+0b6264738f3d/llvm/lib/Target/Mips/MipsSubtarget.cpp
===================================================================
--- llvm-toolchain-snapshot_17~++20230517015648+0b6264738f3d.orig/llvm/lib/Target/Mips/MipsSubtarget.cpp
+++ llvm-toolchain-snapshot_17~++20230517015648+0b6264738f3d/llvm/lib/Target/Mips/MipsSubtarget.cpp
@@ -81,7 +81,7 @@ MipsSubtarget::MipsSubtarget(const Tripl
InMips16HardFloat(Mips16HardFloat), InMicroMipsMode(false), HasDSP(false),
HasDSPR2(false), HasDSPR3(false), AllowMixed16_32(Mixed16_32 || Mips_Os16),
Os16(Mips_Os16), HasMSA(false), UseTCCInDIV(false), HasSym32(false),
- HasEVA(false), DisableMadd4(false), HasMT(false), HasCRC(false),
+ HasEVA(false), DisableMadd4(true), HasMT(false), HasCRC(false),
HasVirt(false), HasGINV(false), UseIndirectJumpsHazard(false),
StackAlignOverride(StackAlignOverride), TM(TM), TargetTriple(TT),
TSInfo(), InstrInfo(MipsInstrInfo::create(
@@ -92,6 +92,9 @@ MipsSubtarget::MipsSubtarget(const Tripl
if (MipsArchVersion == MipsDefault)
MipsArchVersion = Mips32;
+ if (hasMips32r6() || hasMips64r6())
+ DisableMadd4 = false;
+
// MIPS-I has not been tested.
if (MipsArchVersion == Mips1 && !MIPS1WarningPrinted) {
errs() << "warning: MIPS-I support is experimental\n";
@@ -242,6 +245,7 @@ MipsSubtarget &
MipsSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS,
const TargetMachine &TM) {
StringRef CPUName = MIPS_MC::selectMipsCPU(TM.getTargetTriple(), CPU);
+ SubtargetFeatures Features(FS);
// Parse features string.
ParseSubtargetFeatures(CPUName, /*TuneCPU*/ CPUName, FS);
@@ -264,6 +268,13 @@ MipsSubtarget::initializeSubtargetDepend
report_fatal_error("64-bit code requested on a subtarget that doesn't "
"support it!");
+ for (const std::string &Feature : Features.getFeatures()) {
+ if (Feature == "+nomadd4")
+ DisableMadd4 = true;
+ else if (Feature == "-nomadd4")
+ DisableMadd4 = false;
+ }
+
return *this;
}
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