[PATCH] D57360: [GlobalISel] Add IRTranslator support for @llvm.sqrt -> G_FSQRT

[Jessica Paquette via Phabricator via llvm-commits]

paquette created this revision.
paquette added reviewers: aemerson, dsanders.
Herald added subscribers: Petar.Avramovic, volkan, javed.absar, kristof.beyls, rovka.

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

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


https://reviews.llvm.org/D57360

Files:
  lib/CodeGen/GlobalISel/IRTranslator.cpp
  test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll


Index: test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
===================================================================
--- test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
+++ test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
@@ -2315,3 +2315,11 @@
   %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
+}
Index: lib/CodeGen/GlobalISel/IRTranslator.cpp
===================================================================
--- lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -1086,6 +1086,11 @@
         .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;
 }


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