diff options
Diffstat (limited to 'llvm/test/CodeGen')
| -rw-r--r-- | llvm/test/CodeGen/AArch64/aarch64-wide-shuffle.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AArch64/aarch64-wide-shuffle.ll b/llvm/test/CodeGen/AArch64/aarch64-wide-shuffle.ll new file mode 100644 index 00000000000..d06df7a87fd --- /dev/null +++ b/llvm/test/CodeGen/AArch64/aarch64-wide-shuffle.ll @@ -0,0 +1,22 @@ +; RUN: llc < %s | FileCheck %s + +target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128" +target triple = "aarch64-unknown-linux-gnu" + +define <4 x i16> @f(<4 x i32> %vqdmlal_v3.i, <8 x i16> %x5) { +entry: + ; Check that we don't just dup the input vector. The code emitted is ext, dup, ext, ext + ; but only match the last three instructions as the first two could be combined to + ; a dup2 at some stage. + ; CHECK: dup + ; CHECK: ext + ; CHECK: ext + %x4 = extractelement <4 x i32> %vqdmlal_v3.i, i32 2 + %vgetq_lane = trunc i32 %x4 to i16 + %vecinit.i = insertelement <4 x i16> undef, i16 %vgetq_lane, i32 0 + %vecinit2.i = insertelement <4 x i16> %vecinit.i, i16 %vgetq_lane, i32 2 + %vecinit3.i = insertelement <4 x i16> %vecinit2.i, i16 %vgetq_lane, i32 3 + %vgetq_lane261 = extractelement <8 x i16> %x5, i32 0 + %vset_lane267 = insertelement <4 x i16> %vecinit3.i, i16 %vgetq_lane261, i32 1 + ret <4 x i16> %vset_lane267 +} |
