[AVX512] Add support for lowering v32i16 shuffles with repeated lanes. This allows...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272450 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 521008c50ca6166482c14487760277b6263c2bf7..b360cb8ccbad855d29a064f39330e3ec636aeed8 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -11827,6 +11827,17 @@ static SDValue lowerV32I16VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
           DL, MVT::v32i16, V1, V2, Mask, Subtarget, DAG))
     return Rotate;
 
+  if (isSingleInputShuffleMask(Mask)) {
+    SmallVector<int, 8> RepeatedMask;
+    if (is128BitLaneRepeatedShuffleMask(MVT::v32i16, Mask, RepeatedMask)) {
+      // As this is a single-input shuffle, the repeated mask should be
+      // a strictly valid v8i16 mask that we can pass through to the v8i16
+      // lowering to handle even the v32 case.
+      return lowerV8I16GeneralSingleInputVectorShuffle(
+          DL, MVT::v32i16, V1, RepeatedMask, Subtarget, DAG);
+    }
+  }
+
   return lowerVectorShuffleWithPERMV(DL, MVT::v32i16, Mask, V1, V2, DAG);
 }
 

diff --git a/test/CodeGen/X86/vector-shuffle-512-v32.ll b/test/CodeGen/X86/vector-shuffle-512-v32.ll
index f2279ef7e39dc6a2264e9d64d20280fdfc1a041e..067c3f1f3ead87c9af2f37391e16b2e133fbd263 100644 (file)
--- a/test/CodeGen/X86/vector-shuffle-512-v32.ll
+++ b/test/CodeGen/X86/vector-shuffle-512-v32.ll
@@ -1,4 +1,4 @@
-; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; NOTE: Assertions have been autogenerated by update_llc_test_checks.py
 ; RUN: llc < %s -mcpu=x86-64 -mattr=+avx512f -mattr=+avx512bw | FileCheck %s --check-prefix=ALL --check-prefix=AVX512 --check-prefix=AVX512BW
 
 target triple = "x86_64-unknown-unknown"
@@ -79,3 +79,31 @@ define <32 x i16> @shuffle_v32i16_z_0_z_2_z_4_z_6_z_8_z_10_z_12_z_14_z_16_z_18_z
   %c = shufflevector <32 x i16> %a, <32 x i16> zeroinitializer, <32 x i32> <i32 34, i32 0, i32 34, i32 2, i32 34, i32 4, i32 34, i32 6, i32 34, i32 8, i32 34, i32 10, i32 34, i32 12, i32 34, i32 14, i32 34, i32 16, i32 34, i32 18, i32 34, i32 20, i32 34, i32 22, i32 34, i32 24, i32 34, i32 26, i32 34, i32 28, i32 34, i32 30>
   ret <32 x i16> %c
 }
+
+define <32 x i16> @shuffle_v32i16_1_1_0_0_4_5_6_7_9_9_8_8_12_13_14_15_17_17_16_16_20_21_22_23_25_25_24_24_28_29_30_31(<32 x i16> %a, <32 x i16> %b)  {
+; ALL-LABEL: shuffle_v32i16_1_1_0_0_4_5_6_7_9_9_8_8_12_13_14_15_17_17_16_16_20_21_22_23_25_25_24_24_28_29_30_31:
+; ALL:       # BB#0:
+; ALL-NEXT:    vpshuflw {{.*#+}} zmm0 = zmm0[1,1,0,0,4,5,6,7,9,9,8,8,12,13,14,15,17,17,16,16,20,21,22,23,25,25,24,24,28,29,30,31]
+; ALL-NEXT:    retq
+  %c = shufflevector <32 x i16> %a, <32 x i16> zeroinitializer, <32 x i32> <i32 1, i32 1, i32 0, i32 0, i32 4, i32 5, i32 6, i32 7, i32 9, i32 9, i32 8, i32 8, i32 12, i32 13, i32 14, i32 15, i32 17, i32 17, i32 16, i32 16, i32 20, i32 21, i32 22, i32 23, i32 25, i32 25, i32 24, i32 24, i32 28, i32 29, i32 30, i32 31>
+  ret <32 x i16> %c
+}
+
+define <32 x i16> @shuffle_v32i16_0_1_2_3_5_5_4_4_8_9_10_11_13_13_12_12_16_17_18_19_21_21_20_20_24_25_26_27_29_29_28_28(<32 x i16> %a, <32 x i16> %b)  {
+; ALL-LABEL: shuffle_v32i16_0_1_2_3_5_5_4_4_8_9_10_11_13_13_12_12_16_17_18_19_21_21_20_20_24_25_26_27_29_29_28_28:
+; ALL:       # BB#0:
+; ALL-NEXT:    vpshufhw {{.*#+}} zmm0 = zmm0[0,1,2,3,5,5,4,4,8,9,10,11,13,13,12,12,16,17,18,19,21,21,20,20,24,25,26,27,29,29,28,28]
+; ALL-NEXT:    retq
+  %c = shufflevector <32 x i16> %a, <32 x i16> zeroinitializer, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 5, i32 5, i32 4, i32 4, i32 8, i32 9, i32 10, i32 11, i32 13, i32 13, i32 12, i32 12, i32 16, i32 17, i32 18, i32 19, i32 21, i32 21, i32 20, i32 20, i32 24, i32 25, i32 26, i32 27, i32 29, i32 29, i32 28, i32 28>
+  ret <32 x i16> %c
+}
+
+define <32 x i16> @shuffle_v32i16_1_1_0_0_5_5_4_4_9_9_11_11_13_13_12_12_17_17_19_19_21_21_20_20_25_25_27_27_29_29_28_28(<32 x i16> %a, <32 x i16> %b)  {
+; ALL-LABEL: shuffle_v32i16_1_1_0_0_5_5_4_4_9_9_11_11_13_13_12_12_17_17_19_19_21_21_20_20_25_25_27_27_29_29_28_28:
+; ALL:       # BB#0:
+; ALL-NEXT:    vpshuflw {{.*#+}} zmm0 = zmm0[1,1,0,0,4,5,6,7,9,9,8,8,12,13,14,15,17,17,16,16,20,21,22,23,25,25,24,24,28,29,30,31]
+; ALL-NEXT:    vpshufhw {{.*#+}} zmm0 = zmm0[0,1,2,3,5,5,4,4,8,9,10,11,13,13,12,12,16,17,18,19,21,21,20,20,24,25,26,27,29,29,28,28]
+; ALL-NEXT:    retq
+  %c = shufflevector <32 x i16> %a, <32 x i16> zeroinitializer, <32 x i32> <i32 1, i32 1, i32 0, i32 0, i32 5, i32 5, i32 4, i32 4, i32 9, i32 9, i32 8, i32 8, i32 13, i32 13, i32 12, i32 12, i32 17, i32 17, i32 16, i32 16, i32 21, i32 21, i32 20, i32 20, i32 25, i32 25, i32 24, i32 24, i32 29, i32 29, i32 28, i32 28>
+  ret <32 x i16> %c
+}