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It splited into several zb* extensions, and however `b` is dropped after
0.93, so it time to retired that as other non-ratified zb* extensions.
Currntly clang can accept that with warning:
$ clang -target riscv64-elf ~/hello.c -S -march=rv64gcb
'+b' is not a recognized feature for this target (ignoring feature)
'+b' is not a recognized feature for this target (ignoring feature)
'+b' is not a recognized feature for this target (ignoring feature)
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D136812
Files:
clang/test/Driver/riscv-arch.c
llvm/lib/Support/RISCVISAInfo.cpp
Index: llvm/lib/Support/RISCVISAInfo.cpp
===================================================================
--- llvm/lib/Support/RISCVISAInfo.cpp
+++ llvm/lib/Support/RISCVISAInfo.cpp
@@ -602,8 +602,8 @@
// The order is OK, then push it into features.
// TODO: Use version number when setting target features
- // Currently LLVM supports only "mafdcbv".
- StringRef SupportedStandardExtension = "mafdcbv";
+ // Currently LLVM supports only "mafdcv".
+ StringRef SupportedStandardExtension = "mafdcv";
if (!SupportedStandardExtension.contains(C))
return createStringError(errc::invalid_argument,
"unsupported standard user-level extension
'%c'",
Index: clang/test/Driver/riscv-arch.c
===================================================================
--- clang/test/Driver/riscv-arch.c
+++ clang/test/Driver/riscv-arch.c
@@ -258,6 +258,11 @@
// RV32-STD: error: invalid arch name 'rv32imqc',
// RV32-STD: unsupported standard user-level extension 'q'
+// RUN: %clang --target=riscv32-unknown-elf -march=rv32ib -### %s \
+// RUN: -fsyntax-only 2>&1 | FileCheck -check-prefix=RV32-B %s
+// RV32-B: error: invalid arch name 'rv32ib',
+// RV32-B: unsupported standard user-level extension 'b'
+
// RUN: %clang --target=riscv32-unknown-elf -march=rv32xabc -### %s \
// RUN: -fsyntax-only 2>&1 | FileCheck -check-prefix=RV32X %s
// RV32X: error: invalid arch name 'rv32xabc',
Index: llvm/lib/Support/RISCVISAInfo.cpp
===================================================================
--- llvm/lib/Support/RISCVISAInfo.cpp
+++ llvm/lib/Support/RISCVISAInfo.cpp
@@ -602,8 +602,8 @@
// The order is OK, then push it into features.
// TODO: Use version number when setting target features
- // Currently LLVM supports only "mafdcbv".
- StringRef SupportedStandardExtension = "mafdcbv";
+ // Currently LLVM supports only "mafdcv".
+ StringRef SupportedStandardExtension = "mafdcv";
if (!SupportedStandardExtension.contains(C))
return createStringError(errc::invalid_argument,
"unsupported standard user-level extension '%c'",
Index: clang/test/Driver/riscv-arch.c
===================================================================
--- clang/test/Driver/riscv-arch.c
+++ clang/test/Driver/riscv-arch.c
@@ -258,6 +258,11 @@
// RV32-STD: error: invalid arch name 'rv32imqc',
// RV32-STD: unsupported standard user-level extension 'q'
+// RUN: %clang --target=riscv32-unknown-elf -march=rv32ib -### %s \
+// RUN: -fsyntax-only 2>&1 | FileCheck -check-prefix=RV32-B %s
+// RV32-B: error: invalid arch name 'rv32ib',
+// RV32-B: unsupported standard user-level extension 'b'
+
// RUN: %clang --target=riscv32-unknown-elf -march=rv32xabc -### %s \
// RUN: -fsyntax-only 2>&1 | FileCheck -check-prefix=RV32X %s
// RV32X: error: invalid arch name 'rv32xabc',
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