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[Support] Handle SPARC in sys::getHostCPUName 

While working on D118450 <https://reviews.llvm.org/D118450>, I noticed that
`sys::getHostCPUName` lacks SPARC support.

This patch implements it.  The code is taken from/inspired by GCC's
`gcc/config/sparc/driver-sparc.cc`.  There's one caveat: since LLVM, unlike
GCC, doesn't support the SPARC-M7, -S7, and -M8 CPUs, I map all those to
the latest supported one (UltraSparc T4/`niagara4`).

Tested on `sparcv9-sun-solaris2.11` and `sparc64-unknown-linux-gnu` by
running `savcov --version` on

- Netra SPARC S7-2 (SPARC-S7, Solaris 11.4)
- SPARC T5-2 (SPARC T5, Solaris 11.4)
- SPARC Enterprise T5220 (UltraSPARC T2, Solaris 11.3)
- SPARC T5 (UltraSPARC T5, Debian sid)
- SPARC T3 (UltraSPARC T3, Debian sid)
- SPARC Enterprise T5220 (Debian sid)

Differential Revision: https://reviews.llvm.org/D130272
This commit is contained in:
Rainer Orth 2022-07-27 12:21:03 +02:00
parent d3fc779e42
commit 979ddfff37
3 changed files with 112 additions and 0 deletions
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1
llvm/include/llvm/Support/Host.h
View File

@ -65,6 +65,7 @@ namespace sys {
StringRef getHostCPUNameForARM(StringRef ProcCpuinfoContent);
StringRef getHostCPUNameForS390x(StringRef ProcCpuinfoContent);
StringRef getHostCPUNameForRISCV(StringRef ProcCpuinfoContent);
StringRef getHostCPUNameForSPARC(StringRef ProcCpuinfoContent);
StringRef getHostCPUNameForBPF();
/// Helper functions to extract CPU details from CPUID on x86.

3
llvm/lib/Support/CMakeLists.txt
View File

@ -58,6 +58,9 @@ elseif( CMAKE_HOST_UNIX )
if( UNIX AND NOT (BEOS OR HAIKU) )
set(system_libs ${system_libs} m)
endif()
if( UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "SunOS" )
set(system_libs ${system_libs} kstat)
endif()
if( FUCHSIA )
set(system_libs ${system_libs} zircon)
endif()

108
llvm/lib/Support/Host.cpp
View File

@ -47,6 +47,9 @@
#ifdef _AIX
#include <sys/systemcfg.h>
#endif
#if defined(__sun__) && defined(__svr4__)
#include <kstat.h>
#endif
#define DEBUG_TYPE "host-detection"
@ -1413,6 +1416,111 @@ StringRef sys::getHostCPUName() {
#endif
#endif
}
#elif defined(__sparc__)
#if defined(__linux__)
StringRef sys::detail::getHostCPUNameForSPARC(StringRef ProcCpuinfoContent) {
SmallVector<StringRef> Lines;
ProcCpuinfoContent.split(Lines, "\n");
// Look for cpu line to determine cpu name
StringRef Cpu;
for (unsigned I = 0, E = Lines.size(); I != E; ++I) {
if (Lines[I].startswith("cpu")) {
Cpu = Lines[I].substr(5).ltrim("\t :");
break;
}
}
return StringSwitch<const char *>(Cpu)
.StartsWith("SuperSparc", "supersparc")
.StartsWith("HyperSparc", "hypersparc")
.StartsWith("SpitFire", "ultrasparc")
.StartsWith("BlackBird", "ultrasparc")
.StartsWith("Sabre", " ultrasparc")
.StartsWith("Hummingbird", "ultrasparc")
.StartsWith("Cheetah", "ultrasparc3")
.StartsWith("Jalapeno", "ultrasparc3")
.StartsWith("Jaguar", "ultrasparc3")
.StartsWith("Panther", "ultrasparc3")
.StartsWith("Serrano", "ultrasparc3")
.StartsWith("UltraSparc T1", "niagara")
.StartsWith("UltraSparc T2", "niagara2")
.StartsWith("UltraSparc T3", "niagara3")
.StartsWith("UltraSparc T4", "niagara4")
.StartsWith("UltraSparc T5", "niagara4")
.StartsWith("LEON", "leon3")
// niagara7/m8 not supported by LLVM yet.
.StartsWith("SPARC-M7", "niagara4" /* "niagara7" */)
.StartsWith("SPARC-S7", "niagara4" /* "niagara7" */)
.StartsWith("SPARC-M8", "niagara4" /* "m8" */)
.Default("generic");
}
#endif
StringRef sys::getHostCPUName() {
#if defined(__linux__)
std::unique_ptr<llvm::MemoryBuffer> P = getProcCpuinfoContent();
StringRef Content = P ? P->getBuffer() : "";
return detail::getHostCPUNameForSPARC(Content);
#elif defined(__sun__) && defined(__svr4__)
char *buf = NULL;
kstat_ctl_t *kc;
kstat_t *ksp;
kstat_named_t *brand = NULL;
kc = kstat_open();
if (kc != NULL) {
ksp = kstat_lookup(kc, const_cast<char *>("cpu_info"), -1, NULL);
if (ksp != NULL && kstat_read(kc, ksp, NULL) != -1 &&
ksp->ks_type == KSTAT_TYPE_NAMED)
brand =
(kstat_named_t *)kstat_data_lookup(ksp, const_cast<char *>("brand"));
if (brand != NULL && brand->data_type == KSTAT_DATA_STRING)
buf = KSTAT_NAMED_STR_PTR(brand);
}
kstat_close(kc);
return StringSwitch<const char *>(buf)
.Case("TMS390S10", "supersparc") // Texas Instruments microSPARC I
.Case("TMS390Z50", "supersparc") // Texas Instruments SuperSPARC I
.Case("TMS390Z55",
"supersparc") // Texas Instruments SuperSPARC I with SuperCache
.Case("MB86904", "supersparc") // Fujitsu microSPARC II
.Case("MB86907", "supersparc") // Fujitsu TurboSPARC
.Case("RT623", "hypersparc") // Ross hyperSPARC
.Case("RT625", "hypersparc")
.Case("RT626", "hypersparc")
.Case("UltraSPARC-I", "ultrasparc")
.Case("UltraSPARC-II", "ultrasparc")
.Case("UltraSPARC-IIe", "ultrasparc")
.Case("UltraSPARC-IIi", "ultrasparc")
.Case("SPARC64-III", "ultrasparc")
.Case("SPARC64-IV", "ultrasparc")
.Case("UltraSPARC-III", "ultrasparc3")
.Case("UltraSPARC-III+", "ultrasparc3")
.Case("UltraSPARC-IIIi", "ultrasparc3")
.Case("UltraSPARC-IIIi+", "ultrasparc3")
.Case("UltraSPARC-IV", "ultrasparc3")
.Case("UltraSPARC-IV+", "ultrasparc3")
.Case("SPARC64-V", "ultrasparc3")
.Case("SPARC64-VI", "ultrasparc3")
.Case("SPARC64-VII", "ultrasparc3")
.Case("UltraSPARC-T1", "niagara")
.Case("UltraSPARC-T2", "niagara2")
.Case("UltraSPARC-T2", "niagara2")
.Case("UltraSPARC-T2+", "niagara2")
.Case("SPARC-T3", "niagara3")
.Case("SPARC-T4", "niagara4")
.Case("SPARC-T5", "niagara4")
// niagara7/m8 not supported by LLVM yet.
.Case("SPARC-M7", "niagara4" /* "niagara7" */)
.Case("SPARC-S7", "niagara4" /* "niagara7" */)
.Case("SPARC-M8", "niagara4" /* "m8" */)
.Default("generic");
#else
return "generic";
#endif
}
#else
StringRef sys::getHostCPUName() { return "generic"; }
namespace llvm {