"{cc}", "cc",
0,0};
-template <class BaseTAI>
-bool X86TargetAsmInfo<BaseTAI>::LowerToBSwap(CallInst *CI) const {
- // FIXME: this should verify that we are targetting a 486 or better. If not,
- // we will turn this bswap into something that will be lowered to logical ops
- // instead of emitting the bswap asm. For now, we don't support 486 or lower
- // so don't worry about this.
-
- // Verify this is a simple bswap.
- if (CI->getNumOperands() != 2 ||
- CI->getType() != CI->getOperand(1)->getType() ||
- !CI->getType()->isInteger())
- return false;
-
- const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
- if (!Ty || Ty->getBitWidth() % 16 != 0)
- return false;
-
- // Okay, we can do this xform, do so now.
- const Type *Tys[] = { Ty };
- Module *M = CI->getParent()->getParent()->getParent();
- Constant *Int = Intrinsic::getDeclaration(M, Intrinsic::bswap, Tys, 1);
-
- Value *Op = CI->getOperand(1);
- Op = CallInst::Create(Int, Op, CI->getName(), CI);
-
- CI->replaceAllUsesWith(Op);
- CI->eraseFromParent();
- return true;
-}
-
-template <class BaseTAI>
-bool X86TargetAsmInfo<BaseTAI>::ExpandInlineAsm(CallInst *CI) const {
- InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
- std::vector<InlineAsm::ConstraintInfo> Constraints = IA->ParseConstraints();
-
- std::string AsmStr = IA->getAsmString();
-
- // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
- std::vector<std::string> AsmPieces;
- SplitString(AsmStr, AsmPieces, "\n"); // ; as separator?
-
- switch (AsmPieces.size()) {
- default: return false;
- case 1:
- AsmStr = AsmPieces[0];
- AsmPieces.clear();
- SplitString(AsmStr, AsmPieces, " \t"); // Split with whitespace.
-
- // bswap $0
- if (AsmPieces.size() == 2 &&
- AsmPieces[0] == "bswap" && AsmPieces[1] == "$0") {
- // No need to check constraints, nothing other than the equivalent of
- // "=r,0" would be valid here.
- return LowerToBSwap(CI);
- }
- break;
- case 3:
- if (CI->getType() == Type::Int64Ty && Constraints.size() >= 2 &&
- Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
- Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
- // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
- std::vector<std::string> Words;
- SplitString(AsmPieces[0], Words, " \t");
- if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%eax") {
- Words.clear();
- SplitString(AsmPieces[1], Words, " \t");
- if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%edx") {
- Words.clear();
- SplitString(AsmPieces[2], Words, " \t,");
- if (Words.size() == 3 && Words[0] == "xchgl" && Words[1] == "%eax" &&
- Words[2] == "%edx") {
- return LowerToBSwap(CI);
- }
- }
- }
- }
- break;
- }
- return false;
-}
-
X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
X86TargetAsmInfo<DarwinTargetAsmInfo>(TM) {
const X86Subtarget* Subtarget = &DTM->getSubtarget<X86Subtarget>();
DataSectionStartSuffix = "\tsegment 'DATA'";
SectionEndDirectiveSuffix = "\tends\n";
}
+
+template <class BaseTAI>
+bool X86TargetAsmInfo<BaseTAI>::LowerToBSwap(CallInst *CI) const {
+ // FIXME: this should verify that we are targetting a 486 or better. If not,
+ // we will turn this bswap into something that will be lowered to logical ops
+ // instead of emitting the bswap asm. For now, we don't support 486 or lower
+ // so don't worry about this.
+
+ // Verify this is a simple bswap.
+ if (CI->getNumOperands() != 2 ||
+ CI->getType() != CI->getOperand(1)->getType() ||
+ !CI->getType()->isInteger())
+ return false;
+
+ const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
+ if (!Ty || Ty->getBitWidth() % 16 != 0)
+ return false;
+
+ // Okay, we can do this xform, do so now.
+ const Type *Tys[] = { Ty };
+ Module *M = CI->getParent()->getParent()->getParent();
+ Constant *Int = Intrinsic::getDeclaration(M, Intrinsic::bswap, Tys, 1);
+
+ Value *Op = CI->getOperand(1);
+ Op = CallInst::Create(Int, Op, CI->getName(), CI);
+
+ CI->replaceAllUsesWith(Op);
+ CI->eraseFromParent();
+ return true;
+}
+
+template <class BaseTAI>
+bool X86TargetAsmInfo<BaseTAI>::ExpandInlineAsm(CallInst *CI) const {
+ InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
+ std::vector<InlineAsm::ConstraintInfo> Constraints = IA->ParseConstraints();
+
+ std::string AsmStr = IA->getAsmString();
+
+ // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
+ std::vector<std::string> AsmPieces;
+ SplitString(AsmStr, AsmPieces, "\n"); // ; as separator?
+
+ switch (AsmPieces.size()) {
+ default: return false;
+ case 1:
+ AsmStr = AsmPieces[0];
+ AsmPieces.clear();
+ SplitString(AsmStr, AsmPieces, " \t"); // Split with whitespace.
+
+ // bswap $0
+ if (AsmPieces.size() == 2 &&
+ AsmPieces[0] == "bswap" && AsmPieces[1] == "$0") {
+ // No need to check constraints, nothing other than the equivalent of
+ // "=r,0" would be valid here.
+ return LowerToBSwap(CI);
+ }
+ break;
+ case 3:
+ if (CI->getType() == Type::Int64Ty && Constraints.size() >= 2 &&
+ Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
+ Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
+ // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
+ std::vector<std::string> Words;
+ SplitString(AsmPieces[0], Words, " \t");
+ if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%eax") {
+ Words.clear();
+ SplitString(AsmPieces[1], Words, " \t");
+ if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%edx") {
+ Words.clear();
+ SplitString(AsmPieces[2], Words, " \t,");
+ if (Words.size() == 3 && Words[0] == "xchgl" && Words[1] == "%eax" &&
+ Words[2] == "%edx") {
+ return LowerToBSwap(CI);
+ }
+ }
+ }
+ }
+ break;
+ }
+ return false;
+}
+
+// Instantiate default implementation.
+TEMPLATE_INSTANTIATION(class X86TargetAsmInfo<TargetAsmInfo>);
projects / oota-llvm.git / blobdiff