[clang] [Clang] Allow VDBPSADBW intrinsics in constexpr (PR #188887)

[Simon Pilgrim via cfe-commits]

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@@ -3230,21 +3230,35 @@ TEST_CONSTEXPR(match_v64qi(_mm512_maskz_alignr_epi8((__mmask64)0x000000000000000
 __m512i test_mm512_mm_dbsad_epu8(__m512i __A, __m512i __B) {
   // CHECK-LABEL: test_mm512_mm_dbsad_epu8
   // CHECK: @llvm.x86.avx512.dbpsadbw.512
-  return _mm512_dbsad_epu8(__A, __B, 170); 
-}
+  return _mm512_dbsad_epu8(__A, __B, 170);
+}
+// 512-bit: 4 lanes, imm8=0: all shuffle groups select block 0 per lane
+TEST_CONSTEXPR(match_v32hu(_mm512_dbsad_epu8(
+  ((__m512i)(__v64qu){0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+                     0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+                     0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+                     0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}),
+  ((__m512i)(__v64qu){1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+                     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+                     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+                     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}),
+  0), 4, 8, 12, 12, 28, 28, 44, 44,
+      4, 8, 12, 12, 28, 28, 44, 44,
+      4, 8, 12, 12, 28, 28, 44, 44,
+      4, 8, 12, 12, 28, 28, 44, 44));
 
 __m512i test_mm512_mm_mask_dbsad_epu8(__m512i __W, __mmask32 __U, __m512i __A, __m512i __B) {
   // CHECK-LABEL: test_mm512_mm_mask_dbsad_epu8
   // CHECK: @llvm.x86.avx512.dbpsadbw.512
   //CHECK: select <32 x i1> %{{.*}}, <32 x i16> %{{.*}}, <32 x i16> %{{.*}}
-  return _mm512_mask_dbsad_epu8(__W, __U, __A, __B, 170); 
+  return _mm512_mask_dbsad_epu8(__W, __U, __A, __B, 170);
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RKSimon wrote:

_mm512_mask_dbsad_epu8 test coverage

https://github.com/llvm/llvm-project/pull/188887