From: Craig Topper <craig.topper@intel.com>
Date: Thu, 12 Jul 2018 19:58:06 +0000 (+0000)
Subject: [X86][FastISel] Support EVEX version of sqrt.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7cf5f05b8cd9473b32584723900535c6075bdb47;p=llvm

[X86][FastISel] Support EVEX version of sqrt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336939 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp
index 4199eb2ad27..d65d81b17f4 100644
--- a/lib/Target/X86/X86FastISel.cpp
+++ b/lib/Target/X86/X86FastISel.cpp
@@ -2799,17 +2799,19 @@ bool X86FastISel::fastLowerIntrinsicCall(const IntrinsicInst *II) {
     // Unfortunately we can't use fastEmit_r, because the AVX version of FSQRT
     // is not generated by FastISel yet.
     // FIXME: Update this code once tablegen can handle it.
-    static const uint16_t SqrtOpc[2][2] = {
-      {X86::SQRTSSr, X86::VSQRTSSr},
-      {X86::SQRTSDr, X86::VSQRTSDr}
+    static const uint16_t SqrtOpc[3][2] = {
+      { X86::SQRTSSr,   X86::SQRTSDr },
+      { X86::VSQRTSSr,  X86::VSQRTSDr },
+      { X86::VSQRTSSZr, X86::VSQRTSDZr },
     };
-    bool HasAVX = Subtarget->hasAVX();
+    unsigned AVXLevel = Subtarget->hasAVX512() ? 2 :
+                        Subtarget->hasAVX()    ? 1 :
+                                                 0;
     unsigned Opc;
-    const TargetRegisterClass *RC;
     switch (VT.SimpleTy) {
     default: return false;
-    case MVT::f32: Opc = SqrtOpc[0][HasAVX]; RC = &X86::FR32RegClass; break;
-    case MVT::f64: Opc = SqrtOpc[1][HasAVX]; RC = &X86::FR64RegClass; break;
+    case MVT::f32: Opc = SqrtOpc[AVXLevel][0]; break;
+    case MVT::f64: Opc = SqrtOpc[AVXLevel][1]; break;
     }
 
     const Value *SrcVal = II->getArgOperand(0);
@@ -2818,8 +2820,9 @@ bool X86FastISel::fastLowerIntrinsicCall(const IntrinsicInst *II) {
     if (SrcReg == 0)
       return false;
 
+    const TargetRegisterClass *RC = TLI.getRegClassFor(VT);
     unsigned ImplicitDefReg = 0;
-    if (HasAVX) {
+    if (AVXLevel > 0) {
       ImplicitDefReg = createResultReg(RC);
       BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
               TII.get(TargetOpcode::IMPLICIT_DEF), ImplicitDefReg);
diff --git a/test/CodeGen/X86/sse-intrinsics-fast-isel.ll b/test/CodeGen/X86/sse-intrinsics-fast-isel.ll
index 1b54562703e..fce52bf6699 100644
--- a/test/CodeGen/X86/sse-intrinsics-fast-isel.ll
+++ b/test/CodeGen/X86/sse-intrinsics-fast-isel.ll
@@ -2614,10 +2614,15 @@ define float @test_mm_sqrt_ss_scalar(float %a0) {
 ; X64-SSE-NEXT:    sqrtss %xmm0, %xmm0 # encoding: [0xf3,0x0f,0x51,0xc0]
 ; X64-SSE-NEXT:    retq # encoding: [0xc3]
 ;
-; X64-AVX-LABEL: test_mm_sqrt_ss_scalar:
-; X64-AVX:       # %bb.0:
-; X64-AVX-NEXT:    vsqrtss %xmm0, %xmm0, %xmm0 # encoding: [0xc5,0xfa,0x51,0xc0]
-; X64-AVX-NEXT:    retq # encoding: [0xc3]
+; X64-AVX1-LABEL: test_mm_sqrt_ss_scalar:
+; X64-AVX1:       # %bb.0:
+; X64-AVX1-NEXT:    vsqrtss %xmm0, %xmm0, %xmm0 # encoding: [0xc5,0xfa,0x51,0xc0]
+; X64-AVX1-NEXT:    retq # encoding: [0xc3]
+;
+; X64-AVX512-LABEL: test_mm_sqrt_ss_scalar:
+; X64-AVX512:       # %bb.0:
+; X64-AVX512-NEXT:    vsqrtss %xmm0, %xmm0, %xmm0 # EVEX TO VEX Compression encoding: [0xc5,0xfa,0x51,0xc0]
+; X64-AVX512-NEXT:    retq # encoding: [0xc3]
   %sqrt = call float @llvm.sqrt.f32(float %a0)
   ret float %sqrt
 }
diff --git a/test/CodeGen/X86/sse2-intrinsics-fast-isel.ll b/test/CodeGen/X86/sse2-intrinsics-fast-isel.ll
index 03acbaafe82..be389890bb7 100644
--- a/test/CodeGen/X86/sse2-intrinsics-fast-isel.ll
+++ b/test/CodeGen/X86/sse2-intrinsics-fast-isel.ll
@@ -4959,10 +4959,15 @@ define double @test_mm_sqrt_sd_scalar(double %a0) nounwind {
 ; X64-SSE-NEXT:    sqrtsd %xmm0, %xmm0 # encoding: [0xf2,0x0f,0x51,0xc0]
 ; X64-SSE-NEXT:    retq # encoding: [0xc3]
 ;
-; X64-AVX-LABEL: test_mm_sqrt_sd_scalar:
-; X64-AVX:       # %bb.0:
-; X64-AVX-NEXT:    vsqrtsd %xmm0, %xmm0, %xmm0 # encoding: [0xc5,0xfb,0x51,0xc0]
-; X64-AVX-NEXT:    retq # encoding: [0xc3]
+; X64-AVX1-LABEL: test_mm_sqrt_sd_scalar:
+; X64-AVX1:       # %bb.0:
+; X64-AVX1-NEXT:    vsqrtsd %xmm0, %xmm0, %xmm0 # encoding: [0xc5,0xfb,0x51,0xc0]
+; X64-AVX1-NEXT:    retq # encoding: [0xc3]
+;
+; X64-AVX512-LABEL: test_mm_sqrt_sd_scalar:
+; X64-AVX512:       # %bb.0:
+; X64-AVX512-NEXT:    vsqrtsd %xmm0, %xmm0, %xmm0 # EVEX TO VEX Compression encoding: [0xc5,0xfb,0x51,0xc0]
+; X64-AVX512-NEXT:    retq # encoding: [0xc3]
   %sqrt = call double @llvm.sqrt.f64(double %a0)
   ret double %sqrt
 }