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Remove x86_sse42_crc32_64_8 intrinsic. It has no functional difference from x86_sse42_crc32_32_8 and was not mapped to a clang builtin. I'm not even sure why this form of the instruction is even called out explicitly in the docs. Also add AutoUpgrade support to convert it into the other intrinsic with appropriate trunc and zext.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192672 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2013-10-15 05:20:47 +00:00
parent 51dee24ca6
commit 390ff499f0
5 changed files with 16 additions and 11 deletions
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3
include/llvm/IR/IntrinsicsX86.td
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@ -966,9 +966,6 @@ let TargetPrefix = "x86" in { // All intrinsics start with "llvm.x86.".
def int_x86_sse42_crc32_32_32 : GCCBuiltin<"__builtin_ia32_crc32si">,
Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty],
[IntrNoMem]>;
def int_x86_sse42_crc32_64_8 :
Intrinsic<[llvm_i64_ty], [llvm_i64_ty, llvm_i8_ty],
[IntrNoMem]>;
def int_x86_sse42_crc32_64_64 : GCCBuiltin<"__builtin_ia32_crc32di">,
Intrinsic<[llvm_i64_ty], [llvm_i64_ty, llvm_i64_ty],
[IntrNoMem]>;

1
lib/Analysis/ValueTracking.cpp
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@ -760,7 +760,6 @@ void llvm::ComputeMaskedBits(Value *V, APInt &KnownZero, APInt &KnownOne,
KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - LowBits);
break;
}
case Intrinsic::x86_sse42_crc32_64_8:
case Intrinsic::x86_sse42_crc32_64_64:
KnownZero = APInt::getHighBitsSet(64, 32);
break;

7
lib/IR/AutoUpgrade.cpp
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@ -111,6 +111,7 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
Name == "x86.avx.movnt.dq.256" ||
Name == "x86.avx.movnt.pd.256" ||
Name == "x86.avx.movnt.ps.256" ||
Name == "x86.sse42.crc32.64.8" ||
(Name.startswith("x86.xop.vpcom") && F->arg_size() == 2)) {
NewFn = 0;
return true;
@ -271,6 +272,12 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
Function *VPCOM = Intrinsic::getDeclaration(F->getParent(), intID);
Rep = Builder.CreateCall3(VPCOM, CI->getArgOperand(0),
CI->getArgOperand(1), Builder.getInt8(Imm));
} else if (Name == "llvm.x86.sse42.crc32.64.8") {
Function *CRC32 = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::x86_sse42_crc32_32_8);
Value *Trunc0 = Builder.CreateTrunc(CI->getArgOperand(0), Type::getInt32Ty(C));
Rep = Builder.CreateCall2(CRC32, Trunc0, CI->getArgOperand(1));
Rep = Builder.CreateZExt(Rep, CI->getType(), "");
} else {
bool PD128 = false, PD256 = false, PS128 = false, PS256 = false;
if (Name == "llvm.x86.avx.vpermil.pd.256")

15
lib/Target/X86/X86InstrSSE.td
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@ -7260,13 +7260,13 @@ let Defs = [ECX, EFLAGS], Uses = [EAX, EDX], neverHasSideEffects = 1 in {
// This set of instructions are only rm, the only difference is the size
// of r and m.
class SS42I_crc32r<bits<8> opc, string asm, RegisterClass RCOut,
RegisterClass RCIn, Intrinsic Int> :
RegisterClass RCIn, SDPatternOperator Int> :
SS42FI<opc, MRMSrcReg, (outs RCOut:$dst), (ins RCOut:$src1, RCIn:$src2),
!strconcat(asm, "\t{$src2, $src1|$src1, $src2}"),
[(set RCOut:$dst, (Int RCOut:$src1, RCIn:$src2))], IIC_CRC32_REG>;
class SS42I_crc32m<bits<8> opc, string asm, RegisterClass RCOut,
X86MemOperand x86memop, Intrinsic Int> :
X86MemOperand x86memop, SDPatternOperator Int> :
SS42FI<opc, MRMSrcMem, (outs RCOut:$dst), (ins RCOut:$src1, x86memop:$src2),
!strconcat(asm, "\t{$src2, $src1|$src1, $src2}"),
[(set RCOut:$dst, (Int RCOut:$src1, (load addr:$src2)))],
@ -7285,14 +7285,17 @@ let Constraints = "$src1 = $dst" in {
int_x86_sse42_crc32_32_32>;
def CRC32r32r32 : SS42I_crc32r<0xF1, "crc32{l}", GR32, GR32,
int_x86_sse42_crc32_32_32>;
def CRC32r64m8 : SS42I_crc32m<0xF0, "crc32{b}", GR64, i8mem,
int_x86_sse42_crc32_64_8>, REX_W;
def CRC32r64r8 : SS42I_crc32r<0xF0, "crc32{b}", GR64, GR8,
int_x86_sse42_crc32_64_8>, REX_W;
def CRC32r64m64 : SS42I_crc32m<0xF1, "crc32{q}", GR64, i64mem,
int_x86_sse42_crc32_64_64>, REX_W;
def CRC32r64r64 : SS42I_crc32r<0xF1, "crc32{q}", GR64, GR64,
int_x86_sse42_crc32_64_64>, REX_W;
let hasSideEffects = 0 in {
let mayLoad = 1 in
def CRC32r64m8 : SS42I_crc32m<0xF0, "crc32{b}", GR64, i8mem,
null_frag>, REX_W;
def CRC32r64r8 : SS42I_crc32r<0xF0, "crc32{b}", GR64, GR8,
null_frag>, REX_W;
}
}
//===----------------------------------------------------------------------===//

1
lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
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@ -808,7 +808,6 @@ Value *InstCombiner::SimplifyDemandedUseBits(Value *V, APInt DemandedMask,
// TODO: Could compute known zero/one bits based on the input.
break;
}
case Intrinsic::x86_sse42_crc32_64_8:
case Intrinsic::x86_sse42_crc32_64_64:
KnownZero = APInt::getHighBitsSet(64, 32);
return 0;