1 files changed, 40 insertions, 0 deletions
diff --git a/test/CodeGen/X86/pshufb-mask-comments.ll b/test/CodeGen/X86/pshufb-mask-comments.ll
new file mode 100644
index 000000000000..303c4a684761
--- /dev/null
+++ b/test/CodeGen/X86/pshufb-mask-comments.ll
@@ -0,0 +1,40 @@
+; RUN: llc < %s -march=x86-64 -mattr=+ssse3 | FileCheck %s
+
+; Test that the pshufb mask comment is correct.
+
+define <16 x i8> @test1(<16 x i8> %V) {
+; CHECK-LABEL: test1:
+; CHECK: pshufb {{.*}}# xmm0 = xmm0[1,0,0,0,0,2,0,0,0,0,3,0,0,0,0,4]
+  %1 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %V, <16 x i8> <i8 1, i8 0, i8 0, i8 0, i8 0, i8 2, i8 0, i8 0, i8 0, i8 0, i8 3, i8 0, i8 0, i8 0, i8 0, i8 4>)
+  ret <16 x i8> %1
+}
+
+; Test that indexes larger than the size of the vector are shown masked (bottom 4 bits).
+
+define <16 x i8> @test2(<16 x i8> %V) {
+; CHECK-LABEL: test2:
+; CHECK: pshufb {{.*}}# xmm0 = xmm0[15,0,0,0,0,0,0,0,0,0,1,0,0,0,0,2]
+  %1 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %V, <16 x i8> <i8 15, i8 0, i8 0, i8 0, i8 0, i8 16, i8 0, i8 0, i8 0, i8 0, i8 17, i8 0, i8 0, i8 0, i8 0, i8 50>)
+  ret <16 x i8> %1
+}
+
+; Test that indexes with bit seven set are shown as zero.
+
+define <16 x i8> @test3(<16 x i8> %V) {
+; CHECK-LABEL: test3:
+; CHECK: pshufb {{.*}}# xmm0 = xmm0[1,0,0,15,0,2,0,0],zero,xmm0[0,3,0,0],zero,xmm0[0,4]
+  %1 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %V, <16 x i8> <i8 1, i8 0, i8 0, i8 127, i8 0, i8 2, i8 0, i8 0, i8 128, i8 0, i8 3, i8 0, i8 0, i8 255, i8 0, i8 4>)
+  ret <16 x i8> %1
+}
+
+; Test that we won't crash when the constant was reused for another instruction.
+
+define <16 x i8> @test4(<2 x i64>* %V) {
+; CHECK-LABEL: test4
+; CHECK: pshufb {{.*}}
+  store <2 x i64> <i64 1084818905618843912, i64 506097522914230528>, <2 x i64>* %V, align 16
+  %1 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> undef, <16 x i8> <i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15, i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7>)
+  ret <16 x i8> %1
+}
+
+declare <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8>, <16 x i8>) nounwind readnone