[AArch64][SVE] Add bfloat16 support to svlen intrinsic

Reviewed By: fpetrogalli

Differential Revision: https://reviews.llvm.org/D82186

Author: c-rhodes

clang/include/clang/Basic/arm_sve.td

@@ -1281,6 +1281,10 @@ def SVCNTD : SInst<"svcntd", "n", "", MergeNone, "aarch64_sve_cntd", [IsAppendSV
 def SVCNTP : SInst<"svcntp_{d}",  "nPP", "PcPsPiPl",        MergeNone, "aarch64_sve_cntp">;
 def SVLEN  : SInst<"svlen[_{d}]", "nd",  "csilUcUsUiUlhfd", MergeNone>;
 
+let ArchGuard = "defined(__ARM_FEATURE_SVE_BF16)" in {
+def SVLEN_BF16 : SInst<"svlen[_{d}]", "nd", "b", MergeNone>;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Saturating scalar arithmetic
 

clang/lib/CodeGen/CGBuiltin.cpp

@@ -8434,6 +8434,7 @@ Value *CodeGenFunction::EmitAArch64SVEBuiltinExpr(unsigned BuiltinID,
   case SVE::BI__builtin_sve_svpfalse_b:
     return ConstantInt::getFalse(Ty);
 
+  case SVE::BI__builtin_sve_svlen_bf16:
   case SVE::BI__builtin_sve_svlen_f16:
   case SVE::BI__builtin_sve_svlen_f32:
   case SVE::BI__builtin_sve_svlen_f64:

clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_len-bfloat.c

@@ -0,0 +1,27 @@
+// REQUIRES: aarch64-registered-target
+// RUN: %clang_cc1 -D__ARM_FEATURE_SVE -D__ARM_FEATURE_BF16_SCALAR_ARITHMETIC -D__ARM_FEATURE_SVE_BF16 -triple aarch64-none-linux-gnu -target-feature +sve -target-feature +bf16 -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -D__ARM_FEATURE_SVE -D__ARM_FEATURE_BF16_SCALAR_ARITHMETIC -D__ARM_FEATURE_SVE_BF16 -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -target-feature +bf16 -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -D__ARM_FEATURE_SVE -D__ARM_FEATURE_BF16_SCALAR_ARITHMETIC -D__ARM_FEATURE_SVE_BF16 -triple aarch64-none-linux-gnu -target-feature +sve -target-feature +bf16 -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -o - %s >/dev/null 2>%t
+// RUN: FileCheck --check-prefix=ASM --allow-empty %s <%t
+// RUN: %clang_cc1 -D__ARM_FEATURE_SVE -D__ARM_FEATURE_BF16_SCALAR_ARITHMETIC -triple aarch64-none-linux-gnu -target-feature +sve -target-feature +bf16 -fallow-half-arguments-and-returns -fsyntax-only -verify -verify-ignore-unexpected=error -verify-ignore-unexpected=note %s
+
+// If this check fails please read test/CodeGen/aarch64-sve-intrinsics/README for instructions on how to resolve it.
+// ASM-NOT: warning
+#include <arm_sve.h>
+
+#ifdef SVE_OVERLOADED_FORMS
+// A simple used,unused... macro, long enough to represent any SVE builtin.
+#define SVE_ACLE_FUNC(A1,A2_UNUSED,A3,A4_UNUSED) A1##A3
+#else
+#define SVE_ACLE_FUNC(A1,A2,A3,A4) A1##A2##A3##A4
+#endif
+
+uint64_t test_svlen_bf16(svbfloat16_t op)
+{
+  // CHECK-LABEL: test_svlen_bf16
+  // CHECK: %[[VSCALE:.*]] = call i64 @llvm.vscale.i64()
+  // CHECK: %[[SHL:.*]] = shl i64 %[[VSCALE]], 3
+  // CHECK: ret i64 %[[SHL]]
+  // expected-warning@+1 {{implicit declaration of function 'svlen_bf16'}}
+  return SVE_ACLE_FUNC(svlen,_bf16,,)(op);
+}