1 files changed, 21 insertions, 0 deletions
diff --git a/test/CodeGen/X86/vec_shuffle-41.ll b/test/CodeGen/X86/vec_shuffle-41.ll
new file mode 100644
index 0000000..28fdd2f
--- /dev/null
+++ b/test/CodeGen/X86/vec_shuffle-41.ll
@@ -0,0 +1,21 @@
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx | FileCheck %s
+
+; Use buildFromShuffleMostly which allows this to be generated as two 128-bit
+; shuffles and an insert.
+
+; This is the (somewhat questionable) LLVM IR that is generated for:
+;    x8.s0123456 = x8.s1234567;  // x8 is a <8 x float> type
+;    x8.s7 = f;                  // f is float
+
+
+define <8 x float> @test1(<8 x float> %a, float %b) {
+; CHECK-LABEL: test1:
+; CHECK: vinsertps
+; CHECK-NOT: vinsertps
+entry:
+  %shift = shufflevector <8 x float> %a, <8 x float> undef, <7 x i32> <i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+  %extend = shufflevector <7 x float> %shift, <7 x float> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 undef>
+  %insert = insertelement <8 x float> %extend, float %b, i32 7
+
+  ret <8 x float> %insert
+}