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Add AutoUpgrade support for the SSE4 ptest intrinsics.
Patch by Michael Kuperstein. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158295 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
parent
01a90f4f8f
commit
3c98ce242e
@ -25,6 +25,21 @@
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#include <cstring>
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using namespace llvm;
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// Upgrade the declarations of the SSE4.1 functions whose arguments have
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// changed their type from v4f32 to v2i64.
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static bool UpgradeSSE41Function(Function* F, Intrinsic::ID IID,
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Function *&NewFn) {
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// Check whether this is an old version of the function, which received
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// v4f32 arguments.
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Type *Arg0Type = F->getFunctionType()->getParamType(0);
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if (Arg0Type != VectorType::get(Type::getFloatTy(F->getContext()), 4))
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return false;
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// Yes, it's old, replace it with new version.
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F->setName(F->getName() + ".old");
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NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
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return true;
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}
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static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
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assert(F && "Illegal to upgrade a non-existent Function.");
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@ -65,6 +80,15 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
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NewFn = 0;
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return true;
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}
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// SSE4.1 ptest functions may have an old signature.
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if (Name.startswith("x86.sse41.ptest")) {
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if (Name == "x86.sse41.ptestc")
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return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestc, NewFn);
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if (Name == "x86.sse41.ptestz")
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return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestz, NewFn);
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if (Name == "x86.sse41.ptestnzc")
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return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestnzc, NewFn);
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}
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// Fix the FMA4 intrinsics to remove the 4
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if (Name.startswith("x86.fma4.")) {
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F->setName("llvm.x86.fma" + Name.substr(8));
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@ -75,9 +99,9 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
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}
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}
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// This may not belong here. This function is effectively being overloaded
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// to both detect an intrinsic which needs upgrading, and to provide the
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// upgraded form of the intrinsic. We should perhaps have two separate
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// This may not belong here. This function is effectively being overloaded
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// to both detect an intrinsic which needs upgrading, and to provide the
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// upgraded form of the intrinsic. We should perhaps have two separate
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// functions for this.
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return false;
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}
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@ -99,8 +123,8 @@ bool llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
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return false;
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}
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// UpgradeIntrinsicCall - Upgrade a call to an old intrinsic to be a call the
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// upgraded intrinsic. All argument and return casting must be provided in
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// UpgradeIntrinsicCall - Upgrade a call to an old intrinsic to be a call the
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// upgraded intrinsic. All argument and return casting must be provided in
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// order to seamlessly integrate with existing context.
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void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
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Function *F = CI->getCalledFunction();
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@ -242,6 +266,8 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
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return;
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}
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StringRef Name = CI->getName();
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switch (NewFn->getIntrinsicID()) {
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default:
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llvm_unreachable("Unknown function for CallInst upgrade.");
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@ -250,12 +276,39 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
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case Intrinsic::cttz:
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assert(CI->getNumArgOperands() == 1 &&
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"Mismatch between function args and call args");
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StringRef Name = CI->getName();
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CI->setName(Name + ".old");
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CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
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Builder.getFalse(), Name));
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CI->eraseFromParent();
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return;
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case Intrinsic::x86_sse41_ptestc:
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case Intrinsic::x86_sse41_ptestz:
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case Intrinsic::x86_sse41_ptestnzc:
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// The arguments for these intrinsics used to be v4f32, and changed
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// to v2i64. This is purely a nop, since those are bitwise intrinsics.
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// So, the only thing required is a bitcast for both arguments.
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// First, check the arguments have the old type.
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Value *Arg0 = CI->getArgOperand(0);
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if (Arg0->getType() != VectorType::get(Type::getFloatTy(C), 4))
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return;
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// Old intrinsic, add bitcasts
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Value *Arg1 = CI->getArgOperand(1);
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Value *BC0 =
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Builder.CreateBitCast(Arg0,
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VectorType::get(Type::getInt64Ty(C), 2),
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"cast");
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Value *BC1 =
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Builder.CreateBitCast(Arg1,
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VectorType::get(Type::getInt64Ty(C), 2),
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"cast");
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CallInst* NewCall = Builder.CreateCall2(NewFn, BC0, BC1, Name);
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CI->replaceAllUsesWith(NewCall);
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CI->eraseFromParent();
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return;
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}
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}
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22
test/Bitcode/ptest-new.ll
Normal file
22
test/Bitcode/ptest-new.ll
Normal file
@ -0,0 +1,22 @@
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; RUN: llvm-as < %s | llvm-dis | FileCheck %s
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define i32 @foo(<2 x i64> %bar) nounwind {
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entry:
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; CHECK: call i32 @llvm.x86.sse41.ptestc(<2 x i64>
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%res1 = call i32 @llvm.x86.sse41.ptestc(<2 x i64> %bar, <2 x i64> %bar)
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; CHECK: call i32 @llvm.x86.sse41.ptestz(<2 x i64>
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%res2 = call i32 @llvm.x86.sse41.ptestz(<2 x i64> %bar, <2 x i64> %bar)
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; CHECK: call i32 @llvm.x86.sse41.ptestnzc(<2 x i64>
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%res3 = call i32 @llvm.x86.sse41.ptestnzc(<2 x i64> %bar, <2 x i64> %bar)
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%add1 = add i32 %res1, %res2
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%add2 = add i32 %add1, %res2
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ret i32 %add2
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}
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; CHECK: declare i32 @llvm.x86.sse41.ptestc(<2 x i64>, <2 x i64>) nounwind readnone
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; CHECK: declare i32 @llvm.x86.sse41.ptestz(<2 x i64>, <2 x i64>) nounwind readnone
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; CHECK: declare i32 @llvm.x86.sse41.ptestnzc(<2 x i64>, <2 x i64>) nounwind readnone
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declare i32 @llvm.x86.sse41.ptestc(<2 x i64>, <2 x i64>) nounwind readnone
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declare i32 @llvm.x86.sse41.ptestz(<2 x i64>, <2 x i64>) nounwind readnone
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declare i32 @llvm.x86.sse41.ptestnzc(<2 x i64>, <2 x i64>) nounwind readnone
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22
test/Bitcode/ptest-old.ll
Normal file
22
test/Bitcode/ptest-old.ll
Normal file
@ -0,0 +1,22 @@
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; RUN: llvm-as < %s | llvm-dis | FileCheck %s
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define i32 @foo(<4 x float> %bar) nounwind {
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entry:
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; CHECK: call i32 @llvm.x86.sse41.ptestc(<2 x i64>
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%res1 = call i32 @llvm.x86.sse41.ptestc(<4 x float> %bar, <4 x float> %bar)
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; CHECK: call i32 @llvm.x86.sse41.ptestz(<2 x i64>
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%res2 = call i32 @llvm.x86.sse41.ptestz(<4 x float> %bar, <4 x float> %bar)
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; CHECK: call i32 @llvm.x86.sse41.ptestnzc(<2 x i64>
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%res3 = call i32 @llvm.x86.sse41.ptestnzc(<4 x float> %bar, <4 x float> %bar)
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%add1 = add i32 %res1, %res2
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%add2 = add i32 %add1, %res2
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ret i32 %add2
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}
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; CHECK: declare i32 @llvm.x86.sse41.ptestc(<2 x i64>, <2 x i64>) nounwind readnone
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; CHECK: declare i32 @llvm.x86.sse41.ptestz(<2 x i64>, <2 x i64>) nounwind readnone
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; CHECK: declare i32 @llvm.x86.sse41.ptestnzc(<2 x i64>, <2 x i64>) nounwind readnone
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declare i32 @llvm.x86.sse41.ptestc(<4 x float>, <4 x float>) nounwind readnone
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declare i32 @llvm.x86.sse41.ptestz(<4 x float>, <4 x float>) nounwind readnone
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declare i32 @llvm.x86.sse41.ptestnzc(<4 x float>, <4 x float>) nounwind readnone
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