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As described in [1][2], `-mtune=` is used to select the type of target
microarchitecture, defaults to the value of `-march`. The set of
possible values should be a superset of `-march` values. Currently
possible values of `-march=` and `-mtune=` are `native`, `loongarch64`
and `la464`.
D136146 <https://reviews.llvm.org/D136146> has supported
`-march={loongarch64,la464}` and this patch adds
support for `-march=native` and `-mtune=`.
A new ProcessorModel called `loongarch64` is defined in LoongArch.td
to support `-mtune=loongarch64`.
`llvm::sys::getHostCPUName()` returns `generic` on unknown or future
LoongArch CPUs, e.g. the not yet added `la664`, leading to
`llvm::LoongArch::isValidArchName()` failing to parse the arch name.
In this case, use `loongarch64` as the default arch name for 64-bit
CPUs.
And these two preprocessor macros are defined:
- __loongarch_arch
- __loongarch_tune
[1]:
https://github.com/loongson/LoongArch-Documentation/blob/2023.04.20/docs/LoongArch-toolchain-conventions-EN.adoc
[2]:
https://github.com/loongson/la-softdev-convention/blob/v0.1/la-softdev-convention.adoc
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D155824
Files:
clang/lib/Basic/Targets/LoongArch.cpp
clang/lib/Basic/Targets/LoongArch.h
clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
clang/lib/Driver/ToolChains/Clang.cpp
clang/test/Driver/loongarch-mtune-error.c
clang/test/Driver/loongarch-mtune.c
clang/test/Preprocessor/init-loongarch.c
llvm/include/llvm/TargetParser/LoongArchTargetParser.h
llvm/lib/Target/LoongArch/LoongArch.td
llvm/lib/TargetParser/LoongArchTargetParser.cpp
llvm/test/CodeGen/LoongArch/cpus-invalid.ll
llvm/test/CodeGen/LoongArch/cpus.ll
Index: llvm/test/CodeGen/LoongArch/cpus.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/LoongArch/cpus.ll
@@ -0,0 +1,20 @@
+;; This tests that llc accepts all valid LoongArch CPUs.
+;; Note the 'generic' names have been tested in cpu-name-generic.ll.
+
+; RUN: llc < %s --mtriple=loongarch64 --mcpu=loongarch64 2>&1 | FileCheck %s
+; RUN: llc < %s --mtriple=loongarch64 --mcpu=la464 2>&1 | FileCheck %s
+; RUN: llc < %s --mtriple=loongarch64 2>&1 | FileCheck %s
+
+; CHECK-NOT: {{.*}} is not a recognized processor for this target
+
+define void @f() {
+ ret void
+}
+
+define void @tune_cpu_loongarch64() "tune-cpu"="loongarch64" {
+ ret void
+}
+
+define void @tune_cpu_la464() "tune-cpu"="la464" {
+ ret void
+}
Index: llvm/test/CodeGen/LoongArch/cpus-invalid.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/LoongArch/cpus-invalid.ll
@@ -0,0 +1,7 @@
+; RUN: llc < %s --mtriple=loongarch64 --mattr=+64bit --mcpu=invalidcpu 2>&1 | FileCheck %s
+
+; CHECK: {{.*}} is not a recognized processor for this target
+
+define void @f() {
+ ret void
+}
Index: llvm/lib/TargetParser/LoongArchTargetParser.cpp
===================================================================
--- llvm/lib/TargetParser/LoongArchTargetParser.cpp
+++ llvm/lib/TargetParser/LoongArchTargetParser.cpp
@@ -16,6 +16,9 @@
using namespace llvm;
using namespace llvm::LoongArch;
+StringRef Arch;
+StringRef TuneCPU;
+
const FeatureInfo AllFeatures[] = {
#define LOONGARCH_FEATURE(NAME, KIND) {NAME, KIND},
#include "llvm/TargetParser/LoongArchTargetParser.def"
@@ -46,3 +49,25 @@
}
return false;
}
+
+bool LoongArch::isValidTuneCPUName(StringRef TuneCPU) {
+ return isValidArchName(TuneCPU);
+}
+
+void LoongArch::fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values) {
+ for (const auto A : AllArchs)
+ Values.emplace_back(A.Name);
+}
+
+StringRef LoongArch::getDefaultArch(bool Is64Bit) {
+ // TODO: use a real 32-bit arch name.
+ return Is64Bit ? "loongarch64" : "";
+}
+
+void LoongArch::setArch(StringRef Name) { Arch = Name; }
+
+StringRef LoongArch::getArch() { return Arch; }
+
+void LoongArch::setTuneCPU(StringRef Name) { TuneCPU = Name; }
+
+StringRef LoongArch::getTuneCPU() { return TuneCPU; }
Index: llvm/lib/Target/LoongArch/LoongArch.td
===================================================================
--- llvm/lib/Target/LoongArch/LoongArch.td
+++ llvm/lib/Target/LoongArch/LoongArch.td
@@ -117,6 +117,11 @@
def : ProcessorModel<"generic-la32", NoSchedModel, [Feature32Bit]>;
def : ProcessorModel<"generic-la64", NoSchedModel, [Feature64Bit, FeatureUAL]>;
+// Generic 64-bit processor with double-precision floating-point support.
+def : ProcessorModel<"loongarch64", NoSchedModel, [Feature64Bit,
+ FeatureUAL,
+ FeatureBasicD]>;
+
// Support generic for compatibility with other targets. The triple will be used
// to change to the appropriate la32/la64 version.
def : ProcessorModel<"generic", NoSchedModel, []>;
Index: llvm/include/llvm/TargetParser/LoongArchTargetParser.h
===================================================================
--- llvm/include/llvm/TargetParser/LoongArchTargetParser.h
+++ llvm/include/llvm/TargetParser/LoongArchTargetParser.h
@@ -66,9 +66,16 @@
bool isValidArchName(StringRef Arch);
bool getArchFeatures(StringRef Arch, std::vector<StringRef> &Features);
+bool isValidTuneCPUName(StringRef TuneCPU);
+void fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values);
+StringRef getDefaultArch(bool Is64Bit);
+void setArch(StringRef Arch);
+StringRef getArch();
+void setTuneCPU(StringRef TuneCPU);
+StringRef getTuneCPU();
} // namespace LoongArch
} // namespace llvm
-#endif // LLVM_SUPPORT_LOONGARCHTARGETPARSER_H
+#endif // LLVM_TARGETPARSER_LOONGARCHTARGETPARSER_H
Index: clang/test/Preprocessor/init-loongarch.c
===================================================================
--- clang/test/Preprocessor/init-loongarch.c
+++ clang/test/Preprocessor/init-loongarch.c
@@ -787,3 +787,23 @@
// LA64-FPU0-LP64S: #define __loongarch_lp64 1
// LA64-FPU0-LP64S-NOT: #define __loongarch_single_float
// LA64-FPU0-LP64S: #define __loongarch_soft_float 1
+
+/// Check __loongarch_arch and __loongarch_tune.
+
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - | \
+// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=loongarch64 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 | \
+// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=loongarch64 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la464 | \
+// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=la464 -DTUNE=la464 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -mtune=loongarch64 | \
+// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=loongarch64 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -mtune=la464 | \
+// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=la464 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 -mtune=la464 | \
+// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=la464 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la464 -mtune=loongarch64 | \
+// RUN: FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=la464 -DTUNE=loongarch64 %s
+
+// ARCH-TUNE: #define __loongarch_arch [[ARCH]]
+// ARCH-TUNE: #define __loongarch_tune [[TUNE]]
Index: clang/test/Driver/loongarch-mtune.c
===================================================================
--- /dev/null
+++ clang/test/Driver/loongarch-mtune.c
@@ -0,0 +1,16 @@
+// RUN: %clang --target=loongarch64 -mtune=loongarch64 -fsyntax-only %s -### 2>&1 | \
+// RUN: FileCheck %s --check-prefix=CC1ARG -DCPU=loongarch64
+// RUN: %clang --target=loongarch64 -mtune=loongarch64 -S -emit-llvm %s -o - | \
+// RUN: FileCheck %s --check-prefix=IRATTR -DCPU=loongarch64
+//
+// RUN: %clang --target=loongarch64 -mtune=la464 -fsyntax-only %s -### 2>&1 | \
+// RUN: FileCheck %s --check-prefix=CC1ARG -DCPU=la464
+// RUN: %clang --target=loongarch64 -mtune=la464 -S -emit-llvm %s -o - | \
+// RUN: FileCheck %s --check-prefix=IRATTR -DCPU=la464
+
+// CC1ARG: "-tune-cpu" "[[CPU]]"
+// IRATTR: "tune-cpu"="[[CPU]]"
+
+int foo(void) {
+ return 3;
+}
Index: clang/test/Driver/loongarch-mtune-error.c
===================================================================
--- /dev/null
+++ clang/test/Driver/loongarch-mtune-error.c
@@ -0,0 +1,6 @@
+// RUN: not %clang --target=loongarch64 -mtune=invalidcpu -fsyntax-only %s 2>&1 | FileCheck %s
+// RUN: not %clang --target=loongarch64 -mtune=generic -fsyntax-only %s 2>&1 | FileCheck %s
+// RUN: not %clang --target=loongarch64 -mtune=generic-la64 -fsyntax-only %s 2>&1 | FileCheck %s
+
+// CHECK: error: unknown target CPU '{{.*}}'
+// CHECK-NEXT: note: valid target CPU values are: {{.*}}
Index: clang/lib/Driver/ToolChains/Clang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Clang.cpp
+++ clang/lib/Driver/ToolChains/Clang.cpp
@@ -56,6 +56,7 @@
#include "llvm/Support/YAMLParser.h"
#include "llvm/TargetParser/ARMTargetParserCommon.h"
#include "llvm/TargetParser/Host.h"
+#include "llvm/TargetParser/LoongArchTargetParser.h"
#include "llvm/TargetParser/RISCVTargetParser.h"
#include <cctype>
@@ -1853,10 +1854,25 @@
void Clang::AddLoongArchTargetArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
+ const llvm::Triple &Triple = getToolChain().getTriple();
+
CmdArgs.push_back("-target-abi");
- CmdArgs.push_back(loongarch::getLoongArchABI(getToolChain().getDriver(), Args,
- getToolChain().getTriple())
- .data());
+ CmdArgs.push_back(
+ loongarch::getLoongArchABI(getToolChain().getDriver(), Args, Triple)
+ .data());
+
+ // Handle -mtune.
+ if (const Arg *A = Args.getLastArg(options::OPT_mtune_EQ)) {
+ StringRef TuneCPU = A->getValue();
+ if (TuneCPU == "native") {
+ TuneCPU = llvm::sys::getHostCPUName();
+ if (TuneCPU == "generic")
+ TuneCPU = llvm::LoongArch::getDefaultArch(Triple.isLoongArch64());
+ }
+ CmdArgs.push_back("-tune-cpu");
+ CmdArgs.push_back(Args.MakeArgString(TuneCPU));
+ llvm::LoongArch::setTuneCPU(TuneCPU);
+ }
}
void Clang::AddMIPSTargetArgs(const ArgList &Args,
Index: clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
+++ clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
@@ -12,6 +12,7 @@
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
+#include "llvm/TargetParser/Host.h"
#include "llvm/TargetParser/LoongArchTargetParser.h"
using namespace clang::driver;
@@ -128,21 +129,29 @@
std::vector<StringRef> &Features) {
StringRef ArchName;
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
- if (!llvm::LoongArch::isValidArchName(A->getValue())) {
+ ArchName = A->getValue();
+
+ // Handle -march=native.
+ if (ArchName == "native") {
+ ArchName = llvm::sys::getHostCPUName();
+ if (ArchName == "generic")
+ ArchName = llvm::LoongArch::getDefaultArch(Triple.isLoongArch64());
+ }
+
+ if (!llvm::LoongArch::isValidArchName(ArchName)) {
D.Diag(clang::diag::err_drv_invalid_arch_name) << A->getAsString(Args);
return;
}
- ArchName = A->getValue();
}
- // TODO: handle -march=native and -mtune=xx.
-
// Select a default arch name.
- if (ArchName.empty() && Triple.isLoongArch64())
- ArchName = "loongarch64";
+ if (ArchName.empty())
+ ArchName = llvm::LoongArch::getDefaultArch(Triple.isLoongArch64());
- if (!ArchName.empty())
+ if (!ArchName.empty()) {
llvm::LoongArch::getArchFeatures(ArchName, Features);
+ llvm::LoongArch::setArch(ArchName);
+ }
// Select floating-point features determined by -mdouble-float,
// -msingle-float, -msoft-float and -mfpu.
Index: clang/lib/Basic/Targets/LoongArch.h
===================================================================
--- clang/lib/Basic/Targets/LoongArch.h
+++ clang/lib/Basic/Targets/LoongArch.h
@@ -80,6 +80,9 @@
const std::vector<std::string> &FeaturesVec) const override;
bool hasFeature(StringRef Feature) const override;
+
+ bool isValidTuneCPUName(StringRef Name) const override;
+ void fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values) const override;
};
class LLVM_LIBRARY_VISIBILITY LoongArch32TargetInfo
Index: clang/lib/Basic/Targets/LoongArch.cpp
===================================================================
--- clang/lib/Basic/Targets/LoongArch.cpp
+++ clang/lib/Basic/Targets/LoongArch.cpp
@@ -15,7 +15,7 @@
#include "clang/Basic/MacroBuilder.h"
#include "clang/Basic/TargetBuiltins.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/TargetParser/TargetParser.h"
+#include "llvm/TargetParser/LoongArchTargetParser.h"
using namespace clang;
using namespace clang::targets;
@@ -188,7 +188,19 @@
else
Builder.defineMacro("__loongarch_frlen", "0");
- // TODO: define __loongarch_arch and __loongarch_tune.
+ // Define __loongarch_arch.
+ StringRef Arch = llvm::LoongArch::getArch();
+ if (Arch.empty())
+ Arch = llvm::LoongArch::getDefaultArch(GRLen == 64);
+ if (!Arch.empty())
+ Builder.defineMacro("__loongarch_arch", Arch);
+
+ // Define __loongarch_tune.
+ StringRef TuneCPU = llvm::LoongArch::getTuneCPU();
+ if (TuneCPU.empty())
+ TuneCPU = Arch;
+ if (!TuneCPU.empty())
+ Builder.defineMacro("__loongarch_tune", TuneCPU);
StringRef ABI = getABI();
if (ABI == "lp64d" || ABI == "lp64f" || ABI == "lp64s")
@@ -260,3 +272,12 @@
}
return true;
}
+
+bool LoongArchTargetInfo::isValidTuneCPUName(StringRef Name) const {
+ return llvm::LoongArch::isValidTuneCPUName(Name);
+}
+
+void LoongArchTargetInfo::fillValidTuneCPUList(
+ SmallVectorImpl<StringRef> &Values) const {
+ llvm::LoongArch::fillValidTuneCPUList(Values);
+}
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