From: Jessica Paquette <jpaquette@apple.com>
Date: Wed, 30 Jan 2019 20:58:14 +0000 (+0000)
Subject: [GlobalISel] Add IRTranslator support for @llvm.sqrt -> G_FSQRT
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=efb2e2a3e061b99bdbd4154acd940dad5cff4de5;p=llvm

[GlobalISel] Add IRTranslator support for @llvm.sqrt -> G_FSQRT

Follow-up commit to https://reviews.llvm.org/D57359. (r352668)

This adds IRTranslator support for recognising a @llvm.sqrt intrinsic and
translating it into a G_FSQRT.

https://reviews.llvm.org/D57360

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352670 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/GlobalISel/IRTranslator.cpp b/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 3066dfa97f8..9d3a2652844 100644
--- a/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -1086,6 +1086,11 @@ bool IRTranslator::translateKnownIntrinsic(const CallInst &CI, Intrinsic::ID ID,
         .addDef(getOrCreateVReg(CI))
         .addUse(getOrCreateVReg(*CI.getArgOperand(0)));
     return true;
+  case Intrinsic::sqrt:
+    MIRBuilder.buildInstr(TargetOpcode::G_FSQRT)
+        .addDef(getOrCreateVReg(CI))
+        .addUse(getOrCreateVReg(*CI.getArgOperand(0)));
+    return true;
   }
   return false;
 }
diff --git a/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll b/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
index 98326a9cfdf..4ee1fd33381 100644
--- a/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
+++ b/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
@@ -2315,3 +2315,11 @@ define float @test_sin_f32(float %x) {
   %y = call float @llvm.sin.f32(float %x)
   ret float %y
 }
+
+declare float @llvm.sqrt.f32(float)
+define float @test_sqrt_f32(float %x) {
+  ; CHECK-LABEL: name:            test_sqrt_f32
+  ; CHECK: %{{[0-9]+}}:_(s32) = G_FSQRT %{{[0-9]+}}
+  %y = call float @llvm.sqrt.f32(float %x)
+  ret float %y
+}