[X86][EVEX512] Move 512-bit operations under useAVX512Regs

Author: phoebewang

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -2022,6 +2022,10 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
       setOperationAction(ISD::ROTL, MVT::v32i16, Custom);
       setOperationAction(ISD::ROTR, MVT::v32i16, Custom);
     }
+
+    setOperationAction(ISD::FNEG, MVT::v32f16, Custom);
+    setOperationAction(ISD::FABS, MVT::v32f16, Custom);
+    setOperationAction(ISD::FCOPYSIGN, MVT::v32f16, Custom);
   }// useAVX512Regs
 
   if (!Subtarget.useSoftFloat() && Subtarget.hasVBMI2()) {
@@ -2098,9 +2102,6 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
       for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64 })
         setOperationAction(ISD::CTPOP, VT, Legal);
     }
-    setOperationAction(ISD::FNEG, MVT::v32f16, Custom);
-    setOperationAction(ISD::FABS, MVT::v32f16, Custom);
-    setOperationAction(ISD::FCOPYSIGN, MVT::v32f16, Custom);
   }
 
   // This block control legalization of v32i1/v64i1 which are available with

llvm/test/CodeGen/X86/pr90844.ll

@@ -17,3 +17,20 @@ entry:
   store <2 x i64> %5, ptr poison, align 16
   ret void
 }
+
+define void @foo(ptr %0) {
+; CHECK-LABEL: foo:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    vpbroadcastw {{.*#+}} ymm0 = [-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0,-0.0E+0]
+; CHECK-NEXT:    vpxor 32(%rdi), %ymm0, %ymm1
+; CHECK-NEXT:    vpxor (%rdi), %ymm0, %ymm0
+; CHECK-NEXT:    vmovdqa %ymm0, (%rdi)
+; CHECK-NEXT:    vmovdqa %ymm1, 32(%rdi)
+; CHECK-NEXT:    vzeroupper
+; CHECK-NEXT:    retq
+entry:
+  %1 = load <32 x half>, ptr %0
+  %2 = fneg <32 x half> %1
+  store <32 x half> %2, ptr %0
+  ret void
+}