[clang] VectorExprEvaluator::VisitCallExpr - add constant folding for X86 pslldqi/psrldqi intrinsics

clang/include/clang/Basic/BuiltinsX86.td

@@ -267,7 +267,8 @@ let Header = "emmintrin.h", Attributes = [NoThrow, RequireDeclaration] in {
   def _mm_pause : X86LibBuiltin<"void()">;
 }
 
-let Features = "sse2", Attributes = [NoThrow, Const, RequiredVectorWidth<128>] in {
+let Features = "sse2",
+    Attributes = [NoThrow, Const, Constexpr, RequiredVectorWidth<128>] in {
   def psraw128 : X86Builtin<"_Vector<8, short>(_Vector<8, short>, _Vector<8, short>)">;
   def psrad128 : X86Builtin<"_Vector<4, int>(_Vector<4, int>, _Vector<4, int>)">;
   def psrlw128 : X86Builtin<"_Vector<8, short>(_Vector<8, short>, _Vector<8, short>)">;
@@ -568,7 +569,8 @@ let Features = "avx", Attributes = [NoThrow, Const, RequiredVectorWidth<256>] in
   def vec_set_v8si : X86Builtin<"_Vector<8, int>(_Vector<8, int>, int, _Constant int)">;
 }
 
-let Features = "avx2", Attributes = [NoThrow, Const, RequiredVectorWidth<256>] in {
+let Features = "avx2",
+    Attributes = [NoThrow, Const, Constexpr, RequiredVectorWidth<256>] in {
   def mpsadbw256 : X86Builtin<"_Vector<32, char>(_Vector<32, char>, _Vector<32, char>, _Constant char)">;
   def packsswb256 : X86Builtin<"_Vector<32, char>(_Vector<16, short>, _Vector<16, short>)">;
   def packssdw256 : X86Builtin<"_Vector<16, short>(_Vector<8, int>, _Vector<8, int>)">;
@@ -2047,7 +2049,8 @@ let Features = "avx512vl", Attributes = [NoThrow, Const, Constexpr, RequiredVect
   def psravq256 : X86Builtin<"_Vector<4, long long int>(_Vector<4, long long int>, _Vector<4, long long int>)">;
 }
 
-let Features = "avx512bw", Attributes = [NoThrow, Const, RequiredVectorWidth<512>] in {
+let Features = "avx512bw",
+    Attributes = [NoThrow, Const, Constexpr, RequiredVectorWidth<512>] in {
   def psraw512
       : X86Builtin<"_Vector<32, short>(_Vector<32, short>, _Vector<8, short>)">;
   def psrlw512

clang/lib/AST/ExprConstant.cpp

@@ -12127,6 +12127,49 @@ bool VectorExprEvaluator::VisitCallExpr(const CallExpr *E) {
 
     return Success(APValue(ResultElements.data(), ResultElements.size()), E);
   }
+  case X86::BI__builtin_ia32_pslldqi128_byteshift:
+  case X86::BI__builtin_ia32_psrldqi128_byteshift:
+  case X86::BI__builtin_ia32_pslldqi256_byteshift:
+  case X86::BI__builtin_ia32_psrldqi256_byteshift:
+  case X86::BI__builtin_ia32_pslldqi512_byteshift:
+  case X86::BI__builtin_ia32_psrldqi512_byteshift: {
+    APSInt Amt;
+    if (!EvaluateInteger(E->getArg(1), Amt, Info))
+      return false;
+    unsigned ShiftVal = (unsigned)Amt.getZExtValue() & 0xff;
+
+    APValue Vec;
+    if (!Evaluate(Vec, Info, E->getArg(0)) || !Vec.isVector())
+      return false;
+
+    unsigned NumElts = Vec.getVectorLength();
+    const unsigned LaneBytes = 16;
+    assert(NumElts % LaneBytes == 0);
+
+    SmallVector<APValue, 64> Result;
+    Result.resize(NumElts, APValue(0));
+
+    bool IsLeft =
+        (E->getBuiltinCallee() == X86::BI__builtin_ia32_pslldqi128_byteshift ||
+         E->getBuiltinCallee() == X86::BI__builtin_ia32_pslldqi256_byteshift ||
+         E->getBuiltinCallee() == X86::BI__builtin_ia32_pslldqi512_byteshift);
+
+    if (ShiftVal >= LaneBytes)
+      return ZeroInitialization(E);
+
+    for (unsigned LaneBase = 0; LaneBase < NumElts; LaneBase += LaneBytes) {
+      for (unsigned I = 0; I < LaneBytes; ++I) {
+        int src = IsLeft ? (I + ShiftVal) : (int)I - (int)ShiftVal;
+
+        if (src >= 0 && (unsigned)src < LaneBytes)
+          Result[LaneBase + I] = Vec.getVectorElt(LaneBase + (unsigned)src);
+        else
+          Result[LaneBase + I] = APValue(0);
+      }
+    }
+
+    return Success(APValue(Result.data(), Result.size()), E);
+  }
   }
 }
 

clang/test/CodeGen/X86/avx2-builtins.c

@@ -1182,6 +1182,8 @@ __m256i test_mm256_slli_si256(__m256i a) {
   // CHECK: shufflevector <32 x i8> zeroinitializer, <32 x i8> %{{.*}}, <32 x i32> <i32 13, i32 14, i32 15, 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 29, i32 30, i32 31, 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>
   return _mm256_slli_si256(a, 3);
 }
+TEST_CONSTEXPR(match_v32qi(_mm256_slli_si256((__m256i)(__v32qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116}, 5), 0,0,0,0,0,1,2,3,4,5,6,7,8,9,10,11, 0,0,0,0,0,101,102,103,104,105,106,107,108,109,110,111))
+TEST_CONSTEXPR(match_v32qi(_mm256_slli_si256((__m256i)(__v32qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116}, 16), 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0))
 
 __m128i test_mm_sllv_epi32(__m128i a, __m128i b) {
   // CHECK-LABEL: test_mm_sllv_epi32
@@ -1325,6 +1327,8 @@ __m256i test_mm256_srli_si256(__m256i a) {
   // CHECK: shufflevector <32 x i8> %{{.*}}, <32 x i8> zeroinitializer, <32 x i32> <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 15, i32 32, i32 33, i32 34, 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 31, i32 48, i32 49, i32 50>
   return _mm256_srli_si256(a, 3);
 }
+TEST_CONSTEXPR(match_v32qi(_mm256_srli_si256((__m256i)(__v32qi){ 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116}, 5), 6,7,8,9,10,11,12,13,14,15,16,0,0,0,0,0, 106,107,108,109,110,111,112,113,114,115,116,0,0,0,0,0))
+TEST_CONSTEXPR(match_v32qi(_mm256_srli_si256((__m256i)(__v32qi){ 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116}, 16), 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0))
 
 __m128i test_mm_srlv_epi32(__m128i a, __m128i b) {
   // CHECK-LABEL: test_mm_srlv_epi32

clang/test/CodeGen/X86/avx512bw-builtins.c

@@ -2607,3 +2607,19 @@ void test_mm512_mask_cvtusepi16_storeu_epi8 (void * __P, __mmask32 __M, __m512i
  // CHECK: @llvm.x86.avx512.mask.pmovus.wb.mem.512
  _mm512_mask_cvtusepi16_storeu_epi8 ( __P, __M, __A);
 }
+
+__m512i test_mm512_bslli_epi16(__m512i a) {
+  // CHECK-LABEL: @test_bslli
+  // CHECK: shufflevector <64 x i8> %{{.*}}, <64 x i8> zeroinitializer, <64 x i32> <i32 64, i32 65, i32 66, i32 67, 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 68, i32 69, i32 70, i32 71, 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 72, i32 73, i32 74, i32 75, 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 76, i32 77, i32 78, i32 79, i32 48, i32 49, i32 50, i32 51, i32 52, i32 53, i32 54, i32 55, i32 56, i32 57, i32 58, i32 59>
+  return _mm512_bslli_epi128(a, 4);
+}
+TEST_CONSTEXPR(match_v64qi(_mm512_bslli_epi128((__m512i)(__v64qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, 17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64}, 4), 0,0,0,0,1,2,3,4,5,6,7,8,9,10,11,12, 0,0,0,0,17,18,19,20,21,22,23,24,25,26,27,28, 0,0,0,0,33,34,35,36,37,38,39,40,41,42,43,44, 0,0,0,0,49,50,51,52,53,54,55,56,57,58,59,60));
+TEST_CONSTEXPR(match_v64qi(_mm512_bslli_epi128((__m512i)(__v64qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, 17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48, 49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64}, 16), 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0));
+
+__m512i test_mm512_bsrli_epi16(__m512i a) {
+  // CHECK-LABEL: @test_bsrli
+  // CHECK: shufflevector <64 x i8> %{{.*}}, <64 x i8> zeroinitializer, <64 x i32> <i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, 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 31, i32 64, i32 64, i32 64, i32 64, i32 36, i32 37, i32 38, i32 39, i32 40, i32 41, i32 42, i32 43, i32 44, i32 45, i32 46, i32 47, 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, i32 63, i32 64, i32 64, i32 64, i32 64>
+  return _mm512_bsrli_epi128(a, 4);
+}
+TEST_CONSTEXPR(match_v64qi(_mm512_bsrli_epi128((__m512i)(__v64qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, 17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48, 49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64}, 4), 5,6,7,8,9,10,11,12,13,14,15,16,0,0,0,0, 21,22,23,24,25,26,27,28,29,30,31,32,0,0,0,0, 37,38,39,40,41,42,43,44,45,46,47,48,0,0,0,0, 53,54,55,56,57,58,59,60,61,62,63,64,0,0,0,0));
+TEST_CONSTEXPR(match_v64qi(_mm512_bsrli_epi128((__m512i)(__v64qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, 17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48, 49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64}, 16), 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0));

clang/test/CodeGen/X86/sse2-builtins.c

@@ -1553,13 +1553,18 @@ __m128i test_mm_srli_si128(__m128i A) {
   // CHECK: shufflevector <16 x i8> %{{.*}}, <16 x i8> zeroinitializer, <16 x i32> <i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20>
   return _mm_srli_si128(A, 5);
 }
+TEST_CONSTEXPR(match_v16qi(_mm_slli_si128((__m128i)(__v16qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}, 3), 0,0,0,1,2,3,4,5,6,7,8,9,10,11,12,13))
+TEST_CONSTEXPR(match_v16qi(_mm_slli_si128((__m128i)(__v16qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}, 16), 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0))
 
 __m128i test_mm_srli_si128_2(__m128i A) {
   // CHECK-LABEL: test_mm_srli_si128_2
   // ret <2 x i64> zeroinitializer
   return _mm_srli_si128(A, 17);
 }
 
+TEST_CONSTEXPR(match_v16qi(_mm_srli_si128((__m128i)(__v16qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}, 3), 4,5,6,7,8,9,10,11,12,13,14,15,16,0,0,0))
+TEST_CONSTEXPR(match_v16qi(_mm_srli_si128((__m128i)(__v16qi){1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}, 16), 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0))
+
 void test_mm_store_pd(double* A, __m128d B) {
   // CHECK-LABEL: test_mm_store_pd
   // CHECK: store <2 x double> %{{.*}}, ptr %{{.*}}, align 16