[GISel]: Add support to translate ConstantVectors

Reviewed by Quentin
https://reviews.llvm.org/D32814

llvm-svn: 302196

diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 75be7a5..f120481 100644 (file)
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -1108,6 +1108,14 @@ bool IRTranslator::translate(const Constant &C, unsigned Reg) {
     default:
       return false;
     }
+  } else if (auto CV = dyn_cast<ConstantVector>(&C)) {
+    if (CV->getNumOperands() == 1)
+      return translate(*CV->getOperand(0), Reg);
+    SmallVector<unsigned, 4> Ops;
+    for (unsigned i = 0; i < CV->getNumOperands(); ++i) {
+      Ops.push_back(getOrCreateVReg(*CV->getOperand(i)));
+    }
+    EntryBuilder.buildMerge(Reg, Ops);
   } else
     return false;
 

diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll b/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
index 0284802..ac3d4b1 100644 (file)
--- a/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
@@ -1541,3 +1541,12 @@ define <16 x i8> @test_shufflevector_v8s8_v16s8(<8 x i8> %arg1, <8 x i8> %arg2)
   %res = shufflevector <8 x i8> %arg1, <8 x i8> %arg2, <16 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11, i32 4, i32 12, i32 5, i32 13, i32 6, i32 14, i32 7, i32 15>
   ret <16 x i8> %res
 }
+
+; CHECK-LABEL: test_constant_vector
+; CHECK: [[UNDEF:%[0-9]+]](s16) = IMPLICIT_DEF
+; CHECK: [[F:%[0-9]+]](s16) = G_FCONSTANT half 0xH3C00
+; CHECK: [[M:%[0-9]+]](<4 x s16>) = G_MERGE_VALUES [[UNDEF]](s16), [[UNDEF]](s16), [[UNDEF]](s16), [[F]](s16)
+; CHECK: %d0 = COPY [[M]](<4 x s16>)
+define <4 x half> @test_constant_vector() {
+  ret <4 x half> <half undef, half undef, half undef, half 0xH3C00>
+}