Update aosp/master LLVM for rebase to r256229

[android-x86/external-llvm.git] / test / CodeGen / X86 / x86-fold-pshufb.ll

diff --git a/test/CodeGen/X86/x86-fold-pshufb.ll b/test/CodeGen/X86/x86-fold-pshufb.ll
index c29e592..84af4f5 100644 (file)
--- a/test/CodeGen/X86/x86-fold-pshufb.ll
+++ b/test/CodeGen/X86/x86-fold-pshufb.ll
@@ -1,11 +1,13 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc -relocation-model=pic -march=x86-64 -mtriple=x86_64-unknown-unknown -mattr=+ssse3 < %s | FileCheck %s
+; RUN: llc -march=x86-64 -mtriple=x86_64-unknown-unknown -mattr=+ssse3 < %s | FileCheck %s
 
 ; Verify that the backend correctly folds the shuffle in function 'fold_pshufb'
 ; into a simple load from constant pool.
 
 define <2 x i64> @fold_pshufb() {
 ; CHECK-LABEL: fold_pshufb:
-; CHECK:       # BB#0:
+; CHECK:       # BB#0: # %entry
 ; CHECK-NEXT:    movaps {{.*#+}} xmm0 = [0,0,0,0,1,0,0,0,2,0,0,0,3,0,0,0]
 ; CHECK-NEXT:    retq
 entry:
@@ -14,4 +16,20 @@ entry:
   ret <2 x i64> %1
 }
 
+; The pshufb from function @pr24562 was wrongly folded into its first operand
+; as a result of a late target shuffle combine on the legalized selection dag.
+;
+; Check that the pshufb is correctly folded to a zero vector.
+
+define <2 x i64> @pr24562() {
+; CHECK-LABEL: pr24562:
+; CHECK:       # BB#0: # %entry
+; CHECK-NEXT:    xorps %xmm0, %xmm0
+; CHECK-NEXT:    retq
+entry:
+  %0 = call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> <i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1>, <16 x i8> <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>) #2
+  %1 = bitcast <16 x i8> %0 to <2 x i64>
+  ret <2 x i64> %1
+}
+
 declare <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8>, <16 x i8>)