[GlobalISel] Add IRTranslator support for @llvm.lround.* -> G_LROUND

Translate the `@llvm.lround.*` family to G_LROUND via
`IRTranslator::translateSimpleIntrinsic`.

Differential Revision: https://reviews.llvm.org/D108418

diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 8663264..b60b1d3 100644 (file)
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -1763,6 +1763,8 @@ unsigned IRTranslator::getSimpleIntrinsicOpcode(Intrinsic::ID ID) {
       return TargetOpcode::G_VECREDUCE_UMAX;
     case Intrinsic::vector_reduce_umin:
       return TargetOpcode::G_VECREDUCE_UMIN;
+    case Intrinsic::lround:
+      return TargetOpcode::G_LROUND;
   }
   return Intrinsic::not_intrinsic;
 }

diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll b/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
index d8a94c4..3bf7a5c 100644 (file)
--- a/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
@@ -2457,3 +2457,16 @@ define {i8, i32} @test_freeze_struct({ i8, i32 }* %addr) {
 }
 
 !0 = !{ i64 0, i64 2 }
+
+declare i64 @llvm.lround.i64.f32(float) nounwind readnone
+define i64 @lround(float %x) {
+  ; CHECK-LABEL: name: lround
+  ; CHECK: bb.1 (%ir-block.0):
+  ; CHECK:   liveins: $s0
+  ; CHECK:   [[COPY:%[0-9]+]]:_(s32) = COPY $s0
+  ; CHECK:   [[LROUND:%[0-9]+]]:_(s64) = G_LROUND [[COPY]](s32)
+  ; CHECK:   $x0 = COPY [[LROUND]](s64)
+  ; CHECK:   RET_ReallyLR implicit $x0
+  %lround = tail call i64 @llvm.lround.i64.f32(float %x)
+  ret i64 %lround
+}