[X86][InstCombine] Handle demanded elements for operand of AVX-512 scalar floating point to integer conversion intrinsics.

llvm-svn: 289639

1 files changed, 17 insertions, 1 deletions

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
index db5ac7fa570..2e50b2f3e06 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -1685,7 +1685,23 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
   case Intrinsic::x86_sse2_cvtsd2si:
   case Intrinsic::x86_sse2_cvtsd2si64:
   case Intrinsic::x86_sse2_cvttsd2si:
-  case Intrinsic::x86_sse2_cvttsd2si64: {
+  case Intrinsic::x86_sse2_cvttsd2si64:
+  case Intrinsic::x86_avx512_vcvtss2si32:
+  case Intrinsic::x86_avx512_vcvtss2si64:
+  case Intrinsic::x86_avx512_vcvtss2usi32:
+  case Intrinsic::x86_avx512_vcvtss2usi64:
+  case Intrinsic::x86_avx512_vcvtsd2si32:
+  case Intrinsic::x86_avx512_vcvtsd2si64:
+  case Intrinsic::x86_avx512_vcvtsd2usi32:
+  case Intrinsic::x86_avx512_vcvtsd2usi64:
+  case Intrinsic::x86_avx512_cvttss2si:
+  case Intrinsic::x86_avx512_cvttss2si64:
+  case Intrinsic::x86_avx512_cvttss2usi:
+  case Intrinsic::x86_avx512_cvttss2usi64:
+  case Intrinsic::x86_avx512_cvttsd2si:
+  case Intrinsic::x86_avx512_cvttsd2si64:
+  case Intrinsic::x86_avx512_cvttsd2usi:
+  case Intrinsic::x86_avx512_cvttsd2usi64: {
     // These intrinsics only demand the 0th element of their input vectors. If
     // we can simplify the input based on that, do so now.
     Value *Arg = II->getArgOperand(0);