[X86] lowerShuffleAsSpecificZeroOrAnyExtend - use undef PSHUFB mask indices for ANY_E...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@367784 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 45048d25aecc9abe4459592a8739bcb2df782b92..4a4a1358700a02e23a923e8d8bba616fdfd0f87a 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -11893,8 +11893,12 @@ static SDValue lowerShuffleAsSpecificZeroOrAnyExtend(
     SDValue PSHUFBMask[16];
     for (int i = 0; i < 16; ++i) {
       int Idx = Offset + (i / Scale);
-      PSHUFBMask[i] = DAG.getConstant(
-          (i % Scale == 0 && SafeOffset(Idx)) ? Idx : 0x80, DL, MVT::i8);
+      if ((i % Scale == 0 && SafeOffset(Idx))) {
+        PSHUFBMask[i] = DAG.getConstant(Idx, DL, MVT::i8);
+        continue;
+      }
+      PSHUFBMask[i] =
+          AnyExt ? DAG.getUNDEF(MVT::i8) : DAG.getConstant(0x80, DL, MVT::i8);
     }
     InputV = DAG.getBitcast(MVT::v16i8, InputV);
     return DAG.getBitcast(

diff --git a/test/CodeGen/X86/bitcast-vector-bool.ll b/test/CodeGen/X86/bitcast-vector-bool.ll
index 1e402ae0e7123d3e8040b178d02e915d757144ff..9bd23a094700b804e5a0e364962a0194784d604a 100644 (file)
--- a/test/CodeGen/X86/bitcast-vector-bool.ll
+++ b/test/CodeGen/X86/bitcast-vector-bool.ll
@@ -167,7 +167,7 @@ define i8 @bitcast_v16i8_to_v2i8(<16 x i8> %a0) nounwind {
 ; SSSE3:       # %bb.0:
 ; SSSE3-NEXT:    pmovmskb %xmm0, %eax
 ; SSSE3-NEXT:    movd %eax, %xmm0
-; SSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0],zero,zero,zero,zero,zero,zero,zero,xmm0[1],zero,zero,zero,zero,zero,zero,zero
+; SSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0,u,u,u,u,u,u,u,1,u,u,u,u,u,u,u]
 ; SSSE3-NEXT:    movdqa %xmm0, -{{[0-9]+}}(%rsp)
 ; SSSE3-NEXT:    movb -{{[0-9]+}}(%rsp), %al
 ; SSSE3-NEXT:    addb -{{[0-9]+}}(%rsp), %al
@@ -336,7 +336,7 @@ define i8 @bitcast_v16i16_to_v2i8(<16 x i16> %a0) nounwind {
 ; SSSE3-NEXT:    packsswb %xmm1, %xmm0
 ; SSSE3-NEXT:    pmovmskb %xmm0, %eax
 ; SSSE3-NEXT:    movd %eax, %xmm0
-; SSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0],zero,zero,zero,zero,zero,zero,zero,xmm0[1],zero,zero,zero,zero,zero,zero,zero
+; SSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0,u,u,u,u,u,u,u,1,u,u,u,u,u,u,u]
 ; SSSE3-NEXT:    movdqa %xmm0, -{{[0-9]+}}(%rsp)
 ; SSSE3-NEXT:    movb -{{[0-9]+}}(%rsp), %al
 ; SSSE3-NEXT:    addb -{{[0-9]+}}(%rsp), %al
@@ -601,7 +601,7 @@ define i8 @bitcast_v16i32_to_v2i8(<16 x i32> %a0) nounwind {
 ; SSSE3-NEXT:    packsswb %xmm2, %xmm0
 ; SSSE3-NEXT:    pmovmskb %xmm0, %eax
 ; SSSE3-NEXT:    movd %eax, %xmm0
-; SSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0],zero,zero,zero,zero,zero,zero,zero,xmm0[1],zero,zero,zero,zero,zero,zero,zero
+; SSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0,u,u,u,u,u,u,u,1,u,u,u,u,u,u,u]
 ; SSSE3-NEXT:    movdqa %xmm0, -{{[0-9]+}}(%rsp)
 ; SSSE3-NEXT:    movb -{{[0-9]+}}(%rsp), %al
 ; SSSE3-NEXT:    addb -{{[0-9]+}}(%rsp), %al

diff --git a/test/CodeGen/X86/vector-shuffle-128-v16.ll b/test/CodeGen/X86/vector-shuffle-128-v16.ll
index 5b3ce4f9eab20d5945537a9f9a49cfef6dd6cb1f..f2ee3300a9ff2e2c3e67a10b0e126cafc6652e19 100644 (file)
--- a/test/CodeGen/X86/vector-shuffle-128-v16.ll
+++ b/test/CodeGen/X86/vector-shuffle-128-v16.ll
@@ -1205,7 +1205,7 @@ define <16 x i8> @shuffle_v16i8_00_uu_uu_uu_uu_uu_uu_uu_01_uu_uu_uu_uu_uu_uu_uu(
 ;
 ; SSSE3-LABEL: shuffle_v16i8_00_uu_uu_uu_uu_uu_uu_uu_01_uu_uu_uu_uu_uu_uu_uu:
 ; SSSE3:       # %bb.0:
-; SSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0],zero,zero,zero,zero,zero,zero,zero,xmm0[1],zero,zero,zero,zero,zero,zero,zero
+; SSSE3-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0,u,u,u,u,u,u,u,1,u,u,u,u,u,u,u]
 ; SSSE3-NEXT:    retq
 ;
 ; SSE41-LABEL: shuffle_v16i8_00_uu_uu_uu_uu_uu_uu_uu_01_uu_uu_uu_uu_uu_uu_uu: