diff options
Diffstat (limited to 'test/CodeGen/AArch64/concat_vector-truncated-scalar-combine.ll')
| -rw-r--r-- | test/CodeGen/AArch64/concat_vector-truncated-scalar-combine.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/concat_vector-truncated-scalar-combine.ll b/test/CodeGen/AArch64/concat_vector-truncated-scalar-combine.ll new file mode 100644 index 0000000..eb6c80d --- /dev/null +++ b/test/CodeGen/AArch64/concat_vector-truncated-scalar-combine.ll @@ -0,0 +1,18 @@ +; RUN: llc < %s -mtriple aarch64-unknown-unknown -asm-verbose=false | FileCheck %s + +target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" + +; Test the (concat_vectors (bitcast (trunc (scalar))), undef..) pattern. + +define <8 x i8> @test_concat_from_truncated_scalar(i32 %x) #0 { +entry: +; CHECK-LABEL: test_concat_from_truncated_scalar: +; CHECK-NEXT: fmov s0, w0 +; CHECK-NEXT: ret + %t = trunc i32 %x to i16 + %0 = bitcast i16 %t to <2 x i8> + %1 = shufflevector <2 x i8> %0, <2 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2> + ret <8 x i8> %1 +} + +attributes #0 = { nounwind } |