1 files changed, 14 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index 258576f..85abf00 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -1739,6 +1739,20 @@ static void computeKnownBitsFromOperator(const Operator *I,
         Known &= Known2.anyextOrTrunc(BitWidth);
         break;
       }
+      case Intrinsic::x86_sse2_pmulh_w:
+      case Intrinsic::x86_avx2_pmulh_w:
+      case Intrinsic::x86_avx512_pmulh_w_512:
+        computeKnownBits(I->getOperand(0), DemandedElts, Known, Depth + 1, Q);
+        computeKnownBits(I->getOperand(1), DemandedElts, Known2, Depth + 1, Q);
+        Known = KnownBits::mulhs(Known, Known2);
+        break;
+      case Intrinsic::x86_sse2_pmulhu_w:
+      case Intrinsic::x86_avx2_pmulhu_w:
+      case Intrinsic::x86_avx512_pmulhu_w_512:
+        computeKnownBits(I->getOperand(0), DemandedElts, Known, Depth + 1, Q);
+        computeKnownBits(I->getOperand(1), DemandedElts, Known2, Depth + 1, Q);
+        Known = KnownBits::mulhu(Known, Known2);
+        break;
       case Intrinsic::x86_sse42_crc32_64_64:
         Known.Zero.setBitsFrom(32);
         break;