[AVX512] Add support for lowering PALIGNR for v64i8.

Could do this for other types to, but this is what's needed to replace the instrinsic with native IR in clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271828 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 96e0c55..433c46a 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -11770,6 +11770,11 @@ static SDValue lowerV64I8VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
   assert(Mask.size() == 64 && "Unexpected mask size for v64 shuffle!");
   assert(Subtarget.hasBWI() && "We can only lower v64i8 with AVX-512-BWI!");
 
+  // Try to use byte rotation instructions.
+  if (SDValue Rotate = lowerVectorShuffleAsByteRotate(
+          DL, MVT::v64i8, V1, V2, Mask, Subtarget, DAG))
+    return Rotate;
+
   // FIXME: Implement direct support for this type!
   return splitAndLowerVectorShuffle(DL, MVT::v64i8, V1, V2, Mask, DAG);
 }

diff --git a/test/CodeGen/X86/vector-shuffle-512-v64.ll b/test/CodeGen/X86/vector-shuffle-512-v64.ll
index c427285..36020e3 100644 (file)
--- a/test/CodeGen/X86/vector-shuffle-512-v64.ll
+++ b/test/CodeGen/X86/vector-shuffle-512-v64.ll
@@ -25,3 +25,24 @@ define <64 x i8> @shuffle_v64i8_02_03_u_u_u_u_u_u_u_u_u_u_u_u_u_u_u_u_u_u_u_u_u_
   %b = shufflevector <64 x i8> %a, <64 x i8> undef, <64 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   ret <64 x i8> %b
 }
+
+define <64 x i8> @shuffle_v64i8_79_00_01_02_03_04_05_06_07_08_09_10_11_12_13_14_95_16_17_18_19_20_21_22_23_24_25_26_27_28_29_30_111_32_33_34_35_36_37_38_39_40_41_42_43_44_45_46_127_48_49_50_51_52_53_54_55_56_57_58_59_60_61_62(<64 x i8> %a, <64 x i8> %b) {
+; AVX512F-LABEL: shuffle_v64i8_79_00_01_02_03_04_05_06_07_08_09_10_11_12_13_14_95_16_17_18_19_20_21_22_23_24_25_26_27_28_29_30_111_32_33_34_35_36_37_38_39_40_41_42_43_44_45_46_127_48_49_50_51_52_53_54_55_56_57_58_59_60_61_62:
+; AVX512F:       # BB#0:
+; AVX512F-NEXT:    vpalignr {{.*#+}} ymm0 = ymm2[15],ymm0[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14],ymm2[31],ymm0[16,17,18,19,20,21,22,23,24,25,26,27,28,29,30]
+; AVX512F-NEXT:    vpalignr {{.*#+}} ymm1 = ymm3[15],ymm1[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14],ymm3[31],ymm1[16,17,18,19,20,21,22,23,24,25,26,27,28,29,30]
+; AVX512F-NEXT:    retq
+;
+; AVX512BW-LABEL: shuffle_v64i8_79_00_01_02_03_04_05_06_07_08_09_10_11_12_13_14_95_16_17_18_19_20_21_22_23_24_25_26_27_28_29_30_111_32_33_34_35_36_37_38_39_40_41_42_43_44_45_46_127_48_49_50_51_52_53_54_55_56_57_58_59_60_61_62:
+; AVX512BW:       # BB#0:
+; AVX512BW-NEXT:    vpalignr $15, %zmm1, %zmm0, %zmm0
+; AVX512BW-NEXT:    retq
+;
+; AVX512DQ-LABEL: shuffle_v64i8_79_00_01_02_03_04_05_06_07_08_09_10_11_12_13_14_95_16_17_18_19_20_21_22_23_24_25_26_27_28_29_30_111_32_33_34_35_36_37_38_39_40_41_42_43_44_45_46_127_48_49_50_51_52_53_54_55_56_57_58_59_60_61_62:
+; AVX512DQ:       # BB#0:
+; AVX512DQ-NEXT:    vpalignr {{.*#+}} ymm0 = ymm2[15],ymm0[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14],ymm2[31],ymm0[16,17,18,19,20,21,22,23,24,25,26,27,28,29,30]
+; AVX512DQ-NEXT:    vpalignr {{.*#+}} ymm1 = ymm3[15],ymm1[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14],ymm3[31],ymm1[16,17,18,19,20,21,22,23,24,25,26,27,28,29,30]
+; AVX512DQ-NEXT:    retq
+  %shuffle = shufflevector <64 x i8> %a, <64 x i8> %b, <64 x i32> <i32 79, i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 95, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 111, i32 32, i32 33, i32 34, i32 35, i32 36, i32 37, i32 38, i32 39, i32 40, i32 41, i32 42, i32 43, i32 44, i32 45, i32 46, i32 127, i32 48, i32 49, i32 50, i32 51, i32 52, i32 53, i32 54, i32 55, i32 56, i32 57, i32 58, i32 59, i32 60, i32 61, i32 62>
+  ret <64 x i8> %shuffle
+}