[PATCH] D130059: [X86] Promote v32f16's fadd into v32f32's fadd when it is avx512 without avx512fp16

[Bing Yu via Phabricator via llvm-commits]

yubing created this revision.
Herald added subscribers: jsji, pengfei, hiraditya.
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yubing requested review of this revision.
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Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D130059

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/avx512-skx-v32f16-fadd.ll


Index: llvm/test/CodeGen/X86/avx512-skx-v32f16-fadd.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/X86/avx512-skx-v32f16-fadd.ll
@@ -0,0 +1,31 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-- -mattr=avx512f| FileCheck %s --check-prefixes=CHECK
+
+define <32 x half> @foo(<32 x half> %a, <32 x half> %b) {
+; CHECK-LABEL: foo:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    pushq %rbp
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    .cfi_offset %rbp, -16
+; CHECK-NEXT:    movq %rsp, %rbp
+; CHECK-NEXT:    .cfi_def_cfa_register %rbp
+; CHECK-NEXT:    andq $-64, %rsp
+; CHECK-NEXT:    subq $192, %rsp
+; CHECK-NEXT:    vmovaps %zmm1, {{[0-9]+}}(%rsp)
+; CHECK-NEXT:    vmovaps %zmm0, (%rsp)
+; CHECK-NEXT:    vcvtph2ps {{[0-9]+}}(%rsp), %zmm0
+; CHECK-NEXT:    vcvtph2ps (%rsp), %zmm1
+; CHECK-NEXT:    vaddps %zmm0, %zmm1, %zmm0
+; CHECK-NEXT:    vcvtps2ph $4, %zmm0, %ymm0
+; CHECK-NEXT:    vcvtph2ps {{[0-9]+}}(%rsp), %zmm1
+; CHECK-NEXT:    vcvtph2ps {{[0-9]+}}(%rsp), %zmm2
+; CHECK-NEXT:    vaddps %zmm1, %zmm2, %zmm1
+; CHECK-NEXT:    vcvtps2ph $4, %zmm1, %ymm1
+; CHECK-NEXT:    vinsertf64x4 $1, %ymm1, %zmm0, %zmm0
+; CHECK-NEXT:    movq %rbp, %rsp
+; CHECK-NEXT:    popq %rbp
+; CHECK-NEXT:    .cfi_def_cfa %rsp, 8
+; CHECK-NEXT:    retq
+  %1 = fadd <32 x half> %a, %b
+  ret <32 x half> %1
+}
Index: llvm/lib/Target/X86/X86ISelLowering.cpp
===================================================================
--- llvm/lib/Target/X86/X86ISelLowering.cpp
+++ llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1875,8 +1875,10 @@
     setOperationAction(ISD::STRICT_FP_ROUND, MVT::v16f16, Custom);
     setOperationAction(ISD::FP_EXTEND, MVT::v16f32, Legal);
     setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v16f32, Legal);
-    for (unsigned Opc : { ISD::FADD, ISD::FSUB, ISD::FMUL, ISD::FDIV })
+    for (unsigned Opc : {ISD::FADD, ISD::FSUB, ISD::FMUL, ISD::FDIV}) {
       setOperationPromotedToType(Opc, MVT::v16f16, MVT::v16f32);
+      setOperationPromotedToType(Opc, MVT::v32f16, MVT::v32f32);
+    }
 
     for (auto VT : { MVT::v16i32, MVT::v8i64, MVT::v16f32, MVT::v8f64 }) {
       setOperationAction(ISD::MLOAD,               VT, Legal);


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