[X86][AVX512] Removing llvm x86 intrinsics for _mm_mask_move_{ss|sd} intrinsics.

Differential Revision: https://reviews.llvm.org/D26128

llvm-svn: 287087

1 files changed, 16 insertions, 0 deletions

diff --git a/llvm/lib/IR/AutoUpgrade.cpp b/llvm/lib/IR/AutoUpgrade.cpp
index 1b0d2bb8700..3d079ee35f5 100644
--- a/llvm/lib/IR/AutoUpgrade.cpp
+++ b/llvm/lib/IR/AutoUpgrade.cpp
@@ -382,6 +382,7 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
          Name.startswith("avx.vbroadcastf128") || // Added in 4.0
          Name == "avx2.vbroadcasti128" || // Added in 3.7
          Name == "xop.vpcmov" || // Added in 3.8
+         Name.startswith("avx512.mask.move.s") || // Added in 4.0
          (Name.startswith("xop.vpcom") && // Added in 3.2
           F->arg_size() == 2))) {
       NewFn = nullptr;
@@ -706,6 +707,19 @@ static Value *UpgradeX86MaskedShift(IRBuilder<> &Builder, CallInst &CI,
   return EmitX86Select(Builder, CI.getArgOperand(3), Rep, CI.getArgOperand(2));
 }
 
+static Value* upgradeMaskedMove(IRBuilder<> &Builder, CallInst &CI) {
+  Value* A = CI.getArgOperand(0);
+  Value* B = CI.getArgOperand(1);
+  Value* Src = CI.getArgOperand(2);
+  Value* Mask = CI.getArgOperand(3);
+
+  Value* AndNode = Builder.CreateAnd(Mask, APInt(8, 1));
+  Value* Cmp = Builder.CreateIsNotNull(AndNode);
+  Value* Extract1 = Builder.CreateExtractElement(B, (uint64_t)0);
+  Value* Extract2 = Builder.CreateExtractElement(Src, (uint64_t)0);
+  Value* Select = Builder.CreateSelect(Cmp, Extract1, Extract2);
+  return Builder.CreateInsertElement(A, Select, (uint64_t)0);
+}
 
 /// Upgrade a call to an old intrinsic. All argument and return casting must be
 /// provided to seamlessly integrate with existing context.
@@ -1589,6 +1603,8 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
       }
 
       Rep = UpgradeX86MaskedShift(Builder, *CI, IID);
+    } else if (IsX86 && Name.startswith("avx512.mask.move.s")) {
+      Rep = upgradeMaskedMove(Builder, *CI);
     } else {
       llvm_unreachable("Unknown function for CallInst upgrade.");
     }