[clang] [clang][RISCV] Support function attribute __attribute__((target("+attr"))) (PR #83674)
Brandon Wu via cfe-commits
cfe-commits at lists.llvm.org
Sat Mar 2 06:23:33 PST 2024
https://github.com/4vtomat created https://github.com/llvm/llvm-project/pull/83674
It is currently not possible to use "RVV type" and "RVV intrinsics" if
the "zve32x" is not enabled globally. However in some cases we may want
to use them only in some functions, for instance:
```
#include <riscv_vector.h>
__attribute__((target("+zve32x")))
vint32m1_t rvv_add(vint32m1_t v1, vint32m1_t v2, size_t vl) {
return __riscv_vadd(v1, v2, vl);
}
int other_add(int i1, int i2) {
return i1 + i2;
}
```
, it is supposed to be compilable even the vector is not specified, e.g.
`clang -target riscv64 -march=rv64gc -S test.c`.
>From 51c523397008dd307bfbc190fd8966fbc4fa4331 Mon Sep 17 00:00:00 2001
From: Brandon Wu <brandon.wu at sifive.com>
Date: Fri, 1 Mar 2024 09:52:35 -0800
Subject: [PATCH] [clang][RISCV] Support function attribute
__attribute__((target("+attr")))
It is currently not possible to use "RVV type" and "RVV intrinsics" if
the "zve32x" is not enabled globally. However in some cases we may want
to use them only in some functions, for instance:
```
#include <riscv_vector.h>
__attribute__((target("+zve32x")))
vint32m1_t rvv_add(vint32m1_t v1, vint32m1_t v2, size_t vl) {
return __riscv_vadd(v1, v2, vl);
}
int other_add(int i1, int i2) {
return i1 + i2;
}
```
, it is supposed to be compilable even the vector is not specified, e.g.
`clang -target riscv64 -march=rv64gc -S test.c`.
---
clang/include/clang/Sema/Sema.h | 3 +-
clang/lib/Basic/Targets/RISCV.cpp | 3 +-
clang/lib/Sema/Sema.cpp | 7 +-
clang/lib/Sema/SemaChecking.cpp | 70 +++----------------
clang/lib/Sema/SemaDecl.cpp | 9 ++-
.../RISCV/rvb-intrinsics/riscv32-zbb-error.c | 4 +-
.../RISCV/rvb-intrinsics/riscv64-zbkb-error.c | 12 ++--
.../rvv-intrinsics-handcrafted/rvv-error.c | 2 +-
clang/test/Sema/riscv-function-target-attr.c | 41 +++++++++++
clang/utils/TableGen/RISCVVEmitter.cpp | 4 --
10 files changed, 73 insertions(+), 82 deletions(-)
create mode 100644 clang/test/Sema/riscv-function-target-attr.c
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index ef4b93fac95ce5..932b76c82af0ee 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -14067,7 +14067,8 @@ class Sema final {
bool CheckRISCVLMUL(CallExpr *TheCall, unsigned ArgNum);
bool CheckRISCVBuiltinFunctionCall(const TargetInfo &TI, unsigned BuiltinID,
CallExpr *TheCall);
- void checkRVVTypeSupport(QualType Ty, SourceLocation Loc, Decl *D);
+ void checkRVVTypeSupport(QualType Ty, SourceLocation Loc, Decl *D,
+ const llvm::StringMap<bool> &FeatureMap);
bool CheckLoongArchBuiltinFunctionCall(const TargetInfo &TI,
unsigned BuiltinID, CallExpr *TheCall);
bool CheckWebAssemblyBuiltinFunctionCall(const TargetInfo &TI,
diff --git a/clang/lib/Basic/Targets/RISCV.cpp b/clang/lib/Basic/Targets/RISCV.cpp
index a6d4af2b88111a..6991caa21d23b4 100644
--- a/clang/lib/Basic/Targets/RISCV.cpp
+++ b/clang/lib/Basic/Targets/RISCV.cpp
@@ -463,7 +463,8 @@ ParsedTargetAttr RISCVTargetInfo::parseTargetAttr(StringRef Features) const {
Ret.Duplicate = "tune=";
Ret.Tune = AttrString;
- }
+ } else if (Feature.starts_with("+"))
+ Ret.Features.push_back(Feature.str());
}
return Ret;
}
diff --git a/clang/lib/Sema/Sema.cpp b/clang/lib/Sema/Sema.cpp
index cfb653e665ea03..41c7bfb25a7921 100644
--- a/clang/lib/Sema/Sema.cpp
+++ b/clang/lib/Sema/Sema.cpp
@@ -2077,8 +2077,11 @@ void Sema::checkTypeSupport(QualType Ty, SourceLocation Loc, ValueDecl *D) {
targetDiag(D->getLocation(), diag::note_defined_here, FD) << D;
}
- if (TI.hasRISCVVTypes() && Ty->isRVVSizelessBuiltinType())
- checkRVVTypeSupport(Ty, Loc, D);
+ if (TI.hasRISCVVTypes() && Ty->isRVVSizelessBuiltinType() && FD) {
+ llvm::StringMap<bool> CallerFeatureMap;
+ Context.getFunctionFeatureMap(CallerFeatureMap, FD);
+ checkRVVTypeSupport(Ty, Loc, D, CallerFeatureMap);
+ }
// Don't allow SVE types in functions without a SVE target.
if (Ty->isSVESizelessBuiltinType() && FD && FD->hasBody()) {
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 0d4d57db01c93a..50afb56ae09eac 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -5415,57 +5415,6 @@ static bool CheckInvalidVLENandLMUL(const TargetInfo &TI, CallExpr *TheCall,
bool Sema::CheckRISCVBuiltinFunctionCall(const TargetInfo &TI,
unsigned BuiltinID,
CallExpr *TheCall) {
- // CodeGenFunction can also detect this, but this gives a better error
- // message.
- bool FeatureMissing = false;
- SmallVector<StringRef> ReqFeatures;
- StringRef Features = Context.BuiltinInfo.getRequiredFeatures(BuiltinID);
- Features.split(ReqFeatures, ',', -1, false);
-
- // Check if each required feature is included
- for (StringRef F : ReqFeatures) {
- SmallVector<StringRef> ReqOpFeatures;
- F.split(ReqOpFeatures, '|');
-
- if (llvm::none_of(ReqOpFeatures,
- [&TI](StringRef OF) { return TI.hasFeature(OF); })) {
- std::string FeatureStrs;
- bool IsExtension = true;
- for (StringRef OF : ReqOpFeatures) {
- // If the feature is 64bit, alter the string so it will print better in
- // the diagnostic.
- if (OF == "64bit") {
- assert(ReqOpFeatures.size() == 1 && "Expected '64bit' to be alone");
- OF = "RV64";
- IsExtension = false;
- }
- if (OF == "32bit") {
- assert(ReqOpFeatures.size() == 1 && "Expected '32bit' to be alone");
- OF = "RV32";
- IsExtension = false;
- }
-
- // Convert features like "zbr" and "experimental-zbr" to "Zbr".
- OF.consume_front("experimental-");
- std::string FeatureStr = OF.str();
- FeatureStr[0] = std::toupper(FeatureStr[0]);
- // Combine strings.
- FeatureStrs += FeatureStrs.empty() ? "" : ", ";
- FeatureStrs += "'";
- FeatureStrs += FeatureStr;
- FeatureStrs += "'";
- }
- // Error message
- FeatureMissing = true;
- Diag(TheCall->getBeginLoc(), diag::err_riscv_builtin_requires_extension)
- << IsExtension
- << TheCall->getSourceRange() << StringRef(FeatureStrs);
- }
- }
-
- if (FeatureMissing)
- return true;
-
// vmulh.vv, vmulh.vx, vmulhu.vv, vmulhu.vx, vmulhsu.vv, vmulhsu.vx,
// vsmul.vv, vsmul.vx are not included for EEW=64 in Zve64*.
switch (BuiltinID) {
@@ -6369,9 +6318,8 @@ bool Sema::CheckWebAssemblyBuiltinFunctionCall(const TargetInfo &TI,
return false;
}
-void Sema::checkRVVTypeSupport(QualType Ty, SourceLocation Loc, Decl *D) {
- const TargetInfo &TI = Context.getTargetInfo();
-
+void Sema::checkRVVTypeSupport(QualType Ty, SourceLocation Loc, Decl *D,
+ const llvm::StringMap<bool> &FeatureMap) {
ASTContext::BuiltinVectorTypeInfo Info =
Context.getBuiltinVectorTypeInfo(Ty->castAs<BuiltinType>());
unsigned EltSize = Context.getTypeSize(Info.ElementType);
@@ -6380,24 +6328,24 @@ void Sema::checkRVVTypeSupport(QualType Ty, SourceLocation Loc, Decl *D) {
// (ELEN, LMUL) pairs of (8, mf8), (16, mf4), (32, mf2), (64, m1) requires at
// least zve64x
if (((EltSize == 64 && Info.ElementType->isIntegerType()) || MinElts == 1) &&
- !TI.hasFeature("zve64x"))
+ !FeatureMap.lookup("zve64x"))
Diag(Loc, diag::err_riscv_type_requires_extension, D) << Ty << "zve64x";
- else if (Info.ElementType->isFloat16Type() && !TI.hasFeature("zvfh") &&
- !TI.hasFeature("zvfhmin"))
+ else if (Info.ElementType->isFloat16Type() && !FeatureMap.lookup("zvfh") &&
+ !FeatureMap.lookup("zvfhmin"))
Diag(Loc, diag::err_riscv_type_requires_extension, D)
<< Ty << "zvfh or zvfhmin";
else if (Info.ElementType->isBFloat16Type() &&
- !TI.hasFeature("experimental-zvfbfmin"))
+ !FeatureMap.lookup("experimental-zvfbfmin"))
Diag(Loc, diag::err_riscv_type_requires_extension, D) << Ty << "zvfbfmin";
else if (Info.ElementType->isSpecificBuiltinType(BuiltinType::Float) &&
- !TI.hasFeature("zve32f"))
+ !FeatureMap.lookup("zve32f"))
Diag(Loc, diag::err_riscv_type_requires_extension, D) << Ty << "zve32f";
else if (Info.ElementType->isSpecificBuiltinType(BuiltinType::Double) &&
- !TI.hasFeature("zve64d"))
+ !FeatureMap.lookup("zve64d"))
Diag(Loc, diag::err_riscv_type_requires_extension, D) << Ty << "zve64d";
// Given that caller already checked isRVVType() before calling this function,
// if we don't have at least zve32x supported, then we need to emit error.
- else if (!TI.hasFeature("zve32x"))
+ else if (!FeatureMap.lookup("zve32x"))
Diag(Loc, diag::err_riscv_type_requires_extension, D) << Ty << "zve32x";
}
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 6289cf75e17413..c023120131a349 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -8917,8 +8917,13 @@ void Sema::CheckVariableDeclarationType(VarDecl *NewVD) {
}
}
- if (T->isRVVSizelessBuiltinType())
- checkRVVTypeSupport(T, NewVD->getLocation(), cast<Decl>(CurContext));
+ if (T->isRVVSizelessBuiltinType() && isa<FunctionDecl>(CurContext)) {
+ const FunctionDecl *FD = cast<FunctionDecl>(CurContext);
+ llvm::StringMap<bool> CallerFeatureMap;
+ Context.getFunctionFeatureMap(CallerFeatureMap, FD);
+ checkRVVTypeSupport(T, NewVD->getLocation(), cast<Decl>(CurContext),
+ CallerFeatureMap);
+ }
}
/// Perform semantic checking on a newly-created variable
diff --git a/clang/test/CodeGen/RISCV/rvb-intrinsics/riscv32-zbb-error.c b/clang/test/CodeGen/RISCV/rvb-intrinsics/riscv32-zbb-error.c
index ecf090a128aac7..bad68504fab055 100644
--- a/clang/test/CodeGen/RISCV/rvb-intrinsics/riscv32-zbb-error.c
+++ b/clang/test/CodeGen/RISCV/rvb-intrinsics/riscv32-zbb-error.c
@@ -1,6 +1,6 @@
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
-// RUN: %clang_cc1 -triple riscv32 -target-feature +zbb -verify %s -o -
+// RUN: %clang_cc1 -triple riscv32 -target-feature +zbb -S -verify %s -o -
unsigned int orc_b_64(unsigned int a) {
- return __builtin_riscv_orc_b_64(a); // expected-error {{builtin requires: 'RV64'}}
+ return __builtin_riscv_orc_b_64(a); // expected-error {{'__builtin_riscv_orc_b_64' needs target feature zbb,64bit}}
}
diff --git a/clang/test/CodeGen/RISCV/rvb-intrinsics/riscv64-zbkb-error.c b/clang/test/CodeGen/RISCV/rvb-intrinsics/riscv64-zbkb-error.c
index d2e3e76043aef1..a256bf75b031c6 100644
--- a/clang/test/CodeGen/RISCV/rvb-intrinsics/riscv64-zbkb-error.c
+++ b/clang/test/CodeGen/RISCV/rvb-intrinsics/riscv64-zbkb-error.c
@@ -1,14 +1,10 @@
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
-// RUN: %clang_cc1 -triple riscv64 -target-feature +zbkb -verify %s -o -
+// RUN: %clang_cc1 -triple riscv64 -target-feature +zbkb -S -verify %s -o -
#include <stdint.h>
-uint32_t zip(uint32_t rs1)
+uint32_t zip_unzip(uint32_t rs1)
{
- return __builtin_riscv_zip_32(rs1); // expected-error {{builtin requires: 'RV32'}}
-}
-
-uint32_t unzip(uint32_t rs1)
-{
- return __builtin_riscv_unzip_32(rs1); // expected-error {{builtin requires: 'RV32'}}
+ (void)__builtin_riscv_zip_32(rs1); // expected-error {{'__builtin_riscv_zip_32' needs target feature zbkb,32bit}}
+ return __builtin_riscv_unzip_32(rs1); // expected-error {{'__builtin_riscv_unzip_32' needs target feature zbkb,32bit}}
}
diff --git a/clang/test/CodeGen/RISCV/rvv-intrinsics-handcrafted/rvv-error.c b/clang/test/CodeGen/RISCV/rvv-intrinsics-handcrafted/rvv-error.c
index 6ec9b057997690..ecb6c5f2702577 100644
--- a/clang/test/CodeGen/RISCV/rvv-intrinsics-handcrafted/rvv-error.c
+++ b/clang/test/CodeGen/RISCV/rvv-intrinsics-handcrafted/rvv-error.c
@@ -11,7 +11,7 @@
// CHECK-RV64V-NEXT: ret i32 [[CONV]]
//
-// CHECK-RV64-ERR: error: builtin requires at least one of the following extensions: 'Zve32x'
+// CHECK-RV64-ERR: error: '__builtin_rvv_vsetvli' needs target feature zve32x
int test() {
return __builtin_rvv_vsetvli(1, 0, 0);
diff --git a/clang/test/Sema/riscv-function-target-attr.c b/clang/test/Sema/riscv-function-target-attr.c
new file mode 100644
index 00000000000000..470b141aa98d92
--- /dev/null
+++ b/clang/test/Sema/riscv-function-target-attr.c
@@ -0,0 +1,41 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
+// RUN: %clang_cc1 -triple riscv64 -S -verify %s
+
+// REQUIRES: riscv-registered-target
+#include <riscv_vector.h>
+
+void test_builtin() {
+ __riscv_vsetvl_e8m8(1); // expected-error {{'__builtin_rvv_vsetvli' needs target feature zve32x}}
+}
+
+__attribute__((target("+zve32x")))
+void test_builtin_w_zve32x() {
+ __riscv_vsetvl_e8m8(1);
+}
+
+void test_rvv_i32_type() {
+ vint32m1_t v; // expected-error {{RISC-V type 'vint32m1_t' (aka '__rvv_int32m1_t') requires the 'zve32x' extension}}
+}
+
+__attribute__((target("+zve32x")))
+void test_rvv_i32_type_w_zve32x() {
+ vint32m1_t v;
+}
+
+void test_rvv_f32_type() {
+ vfloat32m1_t v; // expected-error {{RISC-V type 'vfloat32m1_t' (aka '__rvv_float32m1_t') requires the 'zve32f' extension}}
+}
+
+__attribute__((target("+zve32f")))
+void test_rvv_f32_type_w_zve32f() {
+ vfloat32m1_t v;
+}
+
+void test_rvv_f64_type() {
+ vfloat64m1_t v; // expected-error {{RISC-V type 'vfloat64m1_t' (aka '__rvv_float64m1_t') requires the 'zve64x' extension}}
+}
+
+__attribute__((target("+zve64d")))
+void test_rvv_f64_type_w_zve64d() {
+ vfloat64m1_t v;
+}
diff --git a/clang/utils/TableGen/RISCVVEmitter.cpp b/clang/utils/TableGen/RISCVVEmitter.cpp
index 8513174c88bfc3..5e41ef9f9d2684 100644
--- a/clang/utils/TableGen/RISCVVEmitter.cpp
+++ b/clang/utils/TableGen/RISCVVEmitter.cpp
@@ -334,10 +334,6 @@ void RVVEmitter::createHeader(raw_ostream &OS) {
OS << "#include <stdint.h>\n";
OS << "#include <stddef.h>\n\n";
- OS << "#ifndef __riscv_vector\n";
- OS << "#error \"Vector intrinsics require the vector extension.\"\n";
- OS << "#endif\n\n";
-
OS << "#ifdef __cplusplus\n";
OS << "extern \"C\" {\n";
OS << "#endif\n\n";
More information about the cfe-commits
mailing list