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Simplify JIT target selection.

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- Instead of requiring targets to define a JIT quality match function, we just
   have them specify if they support a JIT.

 - Target selection for the JIT just gets the host triple and looks for the best
   target which matches the triple and has a JIT.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77060 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2009-07-25 10:09:50 +00:00
parent e0d12d5f7b
commit d6fd377f33
17 changed files with 58 additions and 156 deletions
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21
include/llvm/Target/TargetRegistry.h
View File

@ -68,16 +68,15 @@ namespace llvm {
/// of a module.
ModuleMatchQualityFnTy ModuleMatchQualityFn;
/// JITMatchQualityFn - The target function for rating the match quality
/// with the host.
JITMatchQualityFnTy JITMatchQualityFn;
/// Name - The target name.
const char *Name;
/// ShortDesc - A short description of the target.
const char *ShortDesc;
/// HasJIT - Whether this target supports the JIT.
bool HasJIT;
/// TargetMachineCtorFn - Construction function for this target's
/// TargetMachine, if registered.
TargetMachineCtorTy TargetMachineCtorFn;
@ -100,9 +99,7 @@ namespace llvm {
/// getShortDescription - Get a short description of the target.
const char *getShortDescription() const { return ShortDesc; }
/// getJITMatchQuality - Get the quality of this targets match for use as a
/// JIT.
unsigned getJITMatchQuality() const { return JITMatchQualityFn(); }
bool hasJIT() const { return HasJIT; }
/// hasTargetMachine - Check if this target supports code generation.
bool hasTargetMachine() const { return TargetMachineCtorFn != 0; }
@ -224,14 +221,14 @@ namespace llvm {
/// this target.
/// @param MQualityFn - The module match quality computation function for
/// this target.
/// @param JITMatchQualityFn - The JIT match quality computation function
/// for this target.
/// @param HasJIT - Whether the target supports JIT code
/// generation.
static void RegisterTarget(Target &T,
const char *Name,
const char *ShortDesc,
Target::TripleMatchQualityFnTy TQualityFn,
Target::ModuleMatchQualityFnTy MQualityFn,
Target::JITMatchQualityFnTy JITQualityFn);
bool HasJIT = false);
/// RegisterTargetMachine - Register a TargetMachine implementation for the
/// given target.
@ -292,6 +289,8 @@ namespace llvm {
///
/// namespace {
/// struct FooInfo {
/// static const bool HasJIT = ...;
///
/// static unsigned getJITMatchQuality() { ... }
/// static unsigned getTripleMatchQuality(const std::string &) { ... }
/// static unsigned getModuleMatchQuality(const Module &) { ... }
@ -307,7 +306,7 @@ namespace llvm {
TargetRegistry::RegisterTarget(T, Name, Desc,
&TargetInfoImpl::getTripleMatchQuality,
&TargetInfoImpl::getModuleMatchQuality,
&TargetInfoImpl::getJITMatchQuality);
TargetInfoImpl::HasJIT);
}
};

2
lib/ExecutionEngine/JIT/TargetSelect.cpp
View File

@ -65,7 +65,7 @@ TargetMachine *JIT::selectTarget(ModuleProvider *MP, std::string *ErrorStr) {
return 0;
}
if (TheTarget->getJITMatchQuality() == 0) {
if (!TheTarget->hasJIT()) {
cerr << "WARNING: This target JIT is not designed for the host you are"
<< " running. If bad things happen, please choose a different "
<< "-march switch.\n";

25
lib/Support/TargetRegistry.cpp
View File

@ -8,6 +8,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetRegistry.h"
#include "llvm/System/Host.h"
#include <cassert>
using namespace llvm;
@ -77,9 +78,18 @@ TargetRegistry::getClosestStaticTargetForModule(const Module &M,
}
}
// FIXME: This is a hack to ignore super weak matches like msil, etc. and look
// by host instead. They will be found again via the triple.
if (Best && BestQuality == 1)
Best = EquallyBest = 0;
// If that failed, try looking up the host triple.
if (!Best)
Best = getClosestStaticTargetForTriple(sys::getHostTriple(), Error);
if (!Best) {
Error = "No available targets are compatible with this module";
return 0;
return Best;
}
// Otherwise, take the best target, but make sure we don't have two equally
@ -95,6 +105,8 @@ TargetRegistry::getClosestStaticTargetForModule(const Module &M,
const Target *
TargetRegistry::getClosestTargetForJIT(std::string &Error) {
std::string Triple = sys::getHostTriple();
// Provide special warning when no targets are initialized.
if (begin() == end()) {
Error = "No JIT is available for this host (no targets are registered)";
@ -104,7 +116,10 @@ TargetRegistry::getClosestTargetForJIT(std::string &Error) {
const Target *Best = 0, *EquallyBest = 0;
unsigned BestQuality = 0;
for (iterator it = begin(), ie = end(); it != ie; ++it) {
if (unsigned Qual = it->JITMatchQualityFn()) {
if (!it->hasJIT())
continue;
if (unsigned Qual = it->TripleMatchQualityFn(Triple)) {
if (!Best || Qual > BestQuality) {
Best = &*it;
EquallyBest = 0;
@ -128,8 +143,8 @@ void TargetRegistry::RegisterTarget(Target &T,
const char *ShortDesc,
Target::TripleMatchQualityFnTy TQualityFn,
Target::ModuleMatchQualityFnTy MQualityFn,
Target::JITMatchQualityFnTy JITQualityFn) {
assert(Name && ShortDesc && TQualityFn && MQualityFn && JITQualityFn &&
bool HasJIT) {
assert(Name && ShortDesc && TQualityFn && MQualityFn &&
"Missing required target information!");
// Check if this target has already been initialized, we allow this as a
@ -145,6 +160,6 @@ void TargetRegistry::RegisterTarget(Target &T,
T.ShortDesc = ShortDesc;
T.TripleMatchQualityFn = TQualityFn;
T.ModuleMatchQualityFn = MQualityFn;
T.JITMatchQualityFn = JITQualityFn;
T.HasJIT = HasJIT;
}

22
lib/Target/ARM/TargetInfo/ARMTargetInfo.cpp
View File

@ -14,13 +14,6 @@ using namespace llvm;
Target llvm::TheARMTarget;
static unsigned ARM_JITMatchQuality() {
#if defined(__arm__)
return 10;
#endif
return 0;
}
static unsigned ARM_TripleMatchQuality(const std::string &TT) {
// Match arm-foo-bar, as well as things like armv5blah-*
if (TT.size() >= 4 &&
@ -45,18 +38,11 @@ static unsigned ARM_ModuleMatchQuality(const Module &M) {
M.getPointerSize() != Module::AnyPointerSize)
return 0; // Match for some other target
return ARM_JITMatchQuality()/2;
return 0;
}
Target llvm::TheThumbTarget;
static unsigned Thumb_JITMatchQuality() {
#if defined(__thumb__)
return 10;
#endif
return 0;
}
static unsigned Thumb_TripleMatchQuality(const std::string &TT) {
// Match thumb-foo-bar, as well as things like thumbv5blah-*
if (TT.size() >= 6 &&
@ -81,7 +67,7 @@ static unsigned Thumb_ModuleMatchQuality(const Module &M) {
M.getPointerSize() != Module::AnyPointerSize)
return 0; // Match for some other target
return Thumb_JITMatchQuality()/2;
return 0;
}
extern "C" void LLVMInitializeARMTargetInfo() {
@ -89,11 +75,11 @@ extern "C" void LLVMInitializeARMTargetInfo() {
"ARM",
&ARM_TripleMatchQuality,
&ARM_ModuleMatchQuality,
&ARM_JITMatchQuality);
/*HasJIT=*/true);
TargetRegistry::RegisterTarget(TheThumbTarget, "thumb",
"Thumb",
&Thumb_TripleMatchQuality,
&Thumb_ModuleMatchQuality,
&Thumb_JITMatchQuality);
/*HasJIT=*/true);
}

12
lib/Target/Alpha/TargetInfo/AlphaTargetInfo.cpp
View File

@ -14,14 +14,6 @@ using namespace llvm;
llvm::Target llvm::TheAlphaTarget;
static unsigned Alpha_JITMatchQuality() {
#ifdef __alpha
return 10;
#else
return 0;
#endif
}
static unsigned Alpha_TripleMatchQuality(const std::string &TT) {
// We strongly match "alpha*".
if (TT.size() >= 5 && TT[0] == 'a' && TT[1] == 'l' && TT[2] == 'p' &&
@ -46,7 +38,7 @@ static unsigned Alpha_ModuleMatchQuality(const Module &M) {
M.getPointerSize() != Module::AnyPointerSize)
return 0; // Match for some other target
return Alpha_JITMatchQuality()/2;
return 0;
}
extern "C" void LLVMInitializeAlphaTargetInfo() {
@ -54,5 +46,5 @@ extern "C" void LLVMInitializeAlphaTargetInfo() {
"Alpha [experimental]",
&Alpha_TripleMatchQuality,
&Alpha_ModuleMatchQuality,
&Alpha_JITMatchQuality);
/*HasJIT=*/true);
}

7
lib/Target/CBackend/TargetInfo/CBackendTargetInfo.cpp
View File

@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::TheCBackendTarget;
static unsigned CBackend_JITMatchQuality() {
return 0;
}
static unsigned CBackend_TripleMatchQuality(const std::string &TT) {
// This class always works, but must be requested explicitly on
// llc command line.
@ -34,6 +30,5 @@ extern "C" void LLVMInitializeCBackendTargetInfo() {
TargetRegistry::RegisterTarget(TheCBackendTarget, "c",
"C backend",
&CBackend_TripleMatchQuality,
&CBackend_ModuleMatchQuality,
&CBackend_JITMatchQuality);
&CBackend_ModuleMatchQuality);
}

7
lib/Target/CellSPU/TargetInfo/CellSPUTargetInfo.cpp
View File

@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::TheCellSPUTarget;
static unsigned CellSPU_JITMatchQuality() {
return 0;
}
static unsigned CellSPU_TripleMatchQuality(const std::string &TT) {
// We strongly match "spu-*" or "cellspu-*".
if ((TT.size() == 3 && std::string(TT.begin(), TT.begin()+3) == "spu") ||
@ -44,6 +40,5 @@ extern "C" void LLVMInitializeCellSPUTargetInfo() {
TargetRegistry::RegisterTarget(TheCellSPUTarget, "cellspu",
"STI CBEA Cell SPU [experimental]",
&CellSPU_TripleMatchQuality,
&CellSPU_ModuleMatchQuality,
&CellSPU_JITMatchQuality);
&CellSPU_ModuleMatchQuality);
}

7
lib/Target/CppBackend/TargetInfo/CppBackendTargetInfo.cpp
View File

@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::TheCppBackendTarget;
static unsigned CppBackend_JITMatchQuality() {
return 0;
}
static unsigned CppBackend_TripleMatchQuality(const std::string &TT) {
// This class always works, but shouldn't be the default in most cases.
return 1;
@ -32,6 +28,5 @@ extern "C" void LLVMInitializeCppBackendTargetInfo() {
TargetRegistry::RegisterTarget(TheCppBackendTarget, "cpp",
"C++ backend",
&CppBackend_TripleMatchQuality,
&CppBackend_ModuleMatchQuality,
&CppBackend_JITMatchQuality);
&CppBackend_ModuleMatchQuality);
}

7
lib/Target/MSIL/TargetInfo/MSILTargetInfo.cpp
View File

@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::TheMSILTarget;
static unsigned MSIL_JITMatchQuality() {
return 0;
}
static unsigned MSIL_TripleMatchQuality(const std::string &TT) {
// This class always works, but shouldn't be the default in most cases.
return 1;
@ -32,6 +28,5 @@ extern "C" void LLVMInitializeMSILTargetInfo() {
TargetRegistry::RegisterTarget(TheMSILTarget, "msil",
"MSIL backend",
&MSIL_TripleMatchQuality,
&MSIL_ModuleMatchQuality,
&MSIL_JITMatchQuality);
&MSIL_ModuleMatchQuality);
}

7
lib/Target/MSP430/TargetInfo/MSP430TargetInfo.cpp
View File

@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::TheMSP430Target;
static unsigned MSP430_JITMatchQuality() {
return 0;
}
static unsigned MSP430_TripleMatchQuality(const std::string &TT) {
// We strongly match msp430
if (TT.size() >= 6 && TT[0] == 'm' && TT[1] == 's' && TT[2] == 'p' &&
@ -42,6 +38,5 @@ extern "C" void LLVMInitializeMSP430TargetInfo() {
TargetRegistry::RegisterTarget(TheMSP430Target, "msp430",
"MSP430 [experimental]",
&MSP430_TripleMatchQuality,
&MSP430_ModuleMatchQuality,
&MSP430_JITMatchQuality);
&MSP430_ModuleMatchQuality);
}

14
lib/Target/Mips/TargetInfo/MipsTargetInfo.cpp
View File

@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::TheMipsTarget;
static unsigned Mips_JITMatchQuality() {
return 0;
}
static unsigned Mips_TripleMatchQuality(const std::string &TT) {
// We strongly match "mips*-*".
if (TT.size() >= 5 && std::string(TT.begin(), TT.begin()+5) == "mips-")
@ -43,10 +39,6 @@ static unsigned Mips_ModuleMatchQuality(const Module &M) {
Target llvm::TheMipselTarget;
static unsigned Mipsel_JITMatchQuality() {
return 0;
}
static unsigned Mipsel_TripleMatchQuality(const std::string &TT) {
// We strongly match "mips*el-*".
if (TT.size() >= 7 && std::string(TT.begin(), TT.begin()+7) == "mipsel-")
@ -77,12 +69,10 @@ extern "C" void LLVMInitializeMipsTargetInfo() {
TargetRegistry::RegisterTarget(TheMipsTarget, "mips",
"Mips",
&Mips_TripleMatchQuality,
&Mips_ModuleMatchQuality,
&Mips_JITMatchQuality);
&Mips_ModuleMatchQuality);
TargetRegistry::RegisterTarget(TheMipselTarget, "mipsel",
"Mipsel",
&Mipsel_TripleMatchQuality,
&Mipsel_ModuleMatchQuality,
&Mipsel_JITMatchQuality);
&Mipsel_ModuleMatchQuality);
}

14
lib/Target/PIC16/TargetInfo/PIC16TargetInfo.cpp
View File

@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::ThePIC16Target;
static unsigned PIC16_JITMatchQuality() {
return 0;
}
static unsigned PIC16_TripleMatchQuality(const std::string &TT) {
return 0;
}
@ -28,10 +24,6 @@ static unsigned PIC16_ModuleMatchQuality(const Module &M) {
Target llvm::TheCooperTarget;
static unsigned Cooper_JITMatchQuality() {
return 0;
}
static unsigned Cooper_TripleMatchQuality(const std::string &TT) {
return 0;
}
@ -44,12 +36,10 @@ extern "C" void LLVMInitializePIC16TargetInfo() {
TargetRegistry::RegisterTarget(ThePIC16Target, "pic16",
"PIC16 14-bit [experimental]",
&PIC16_TripleMatchQuality,
&PIC16_ModuleMatchQuality,
&PIC16_JITMatchQuality);
&PIC16_ModuleMatchQuality);
TargetRegistry::RegisterTarget(TheCooperTarget, "cooper",
"PIC16 Cooper [experimental]",
&Cooper_TripleMatchQuality,
&Cooper_ModuleMatchQuality,
&Cooper_JITMatchQuality);
&Cooper_ModuleMatchQuality);
}

24
lib/Target/PowerPC/TargetInfo/PowerPCTargetInfo.cpp
View File

@ -14,14 +14,6 @@ using namespace llvm;
Target llvm::ThePPC32Target;
static unsigned PPC32_JITMatchQuality() {
#if defined(__POWERPC__) || defined (__ppc__) || defined(_POWER) || defined(__PPC__)
if (sizeof(void*) == 4)
return 10;
#endif
return 0;
}
static unsigned PPC32_TripleMatchQuality(const std::string &TT) {
// We strongly match "powerpc-*".
if (TT.size() >= 8 && std::string(TT.begin(), TT.begin()+8) == "powerpc-")
@ -45,19 +37,11 @@ static unsigned PPC32_ModuleMatchQuality(const Module &M) {
M.getPointerSize() != Module::AnyPointerSize)
return 0; // Match for some other target
return PPC32_JITMatchQuality()/2;
return 0;
}
Target llvm::ThePPC64Target;
static unsigned PPC64_JITMatchQuality() {
#if defined(__POWERPC__) || defined (__ppc__) || defined(_POWER) || defined(__PPC__)
if (sizeof(void*) == 8)
return 10;
#endif
return 0;
}
static unsigned PPC64_TripleMatchQuality(const std::string &TT) {
// We strongly match "powerpc64-*".
if (TT.size() >= 10 && std::string(TT.begin(), TT.begin()+10) == "powerpc64-")
@ -81,7 +65,7 @@ static unsigned PPC64_ModuleMatchQuality(const Module &M) {
M.getPointerSize() != Module::AnyPointerSize)
return 0; // Match for some other target
return PPC64_JITMatchQuality()/2;
return 0;
}
extern "C" void LLVMInitializePowerPCTargetInfo() {
@ -89,11 +73,11 @@ extern "C" void LLVMInitializePowerPCTargetInfo() {
"PowerPC 32",
&PPC32_TripleMatchQuality,
&PPC32_ModuleMatchQuality,
&PPC32_JITMatchQuality);
/*HasJIT=*/true);
TargetRegistry::RegisterTarget(ThePPC64Target, "ppc64",
"PowerPC 64",
&PPC64_TripleMatchQuality,
&PPC64_ModuleMatchQuality,
&PPC64_JITMatchQuality);
/*HasJIT=*/true);
}

7
lib/Target/Sparc/TargetInfo/SparcTargetInfo.cpp
View File

@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::TheSparcTarget;
static unsigned Sparc_JITMatchQuality() {
return 0;
}
static unsigned Sparc_TripleMatchQuality(const std::string &TT) {
if (TT.size() >= 6 && std::string(TT.begin(), TT.begin()+6) == "sparc-")
return 20;
@ -57,6 +53,5 @@ extern "C" void LLVMInitializeSparcTargetInfo() {
TargetRegistry::RegisterTarget(TheSparcTarget, "sparc",
"Sparc",
&Sparc_TripleMatchQuality,
&Sparc_ModuleMatchQuality,
&Sparc_JITMatchQuality);
&Sparc_ModuleMatchQuality);
}

9
lib/Target/SystemZ/TargetInfo/SystemZTargetInfo.cpp
View File

@ -1,4 +1,4 @@
//===-- SystemZTargetInfo.cpp - SystemZ Target Implementation -----------------===//
//===-- SystemZTargetInfo.cpp - SystemZ Target Implementation -------------===//
//
// The LLVM Compiler Infrastructure
//
@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::TheSystemZTarget;
static unsigned SystemZ_JITMatchQuality() {
return 0;
}
static unsigned SystemZ_TripleMatchQuality(const std::string &TT) {
// We strongly match s390x
if (TT.size() >= 5 && TT[0] == 's' && TT[1] == '3' && TT[2] == '9' &&
@ -40,6 +36,5 @@ extern "C" void LLVMInitializeSystemZTargetInfo() {
TargetRegistry::RegisterTarget(TheSystemZTarget, "systemz",
"SystemZ",
&SystemZ_TripleMatchQuality,
&SystemZ_ModuleMatchQuality,
&SystemZ_JITMatchQuality);
&SystemZ_ModuleMatchQuality);
}

22
lib/Target/X86/TargetInfo/X86TargetInfo.cpp
View File

@ -14,13 +14,6 @@ using namespace llvm;
Target llvm::TheX86_32Target;
static unsigned X86_32_JITMatchQuality() {
#if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
return 10;
#endif
return 0;
}
static unsigned X86_32_TripleMatchQuality(const std::string &TT) {
// We strongly match "i[3-9]86-*".
if (TT.size() >= 5 && TT[0] == 'i' && TT[2] == '8' && TT[3] == '6' &&
@ -45,18 +38,11 @@ static unsigned X86_32_ModuleMatchQuality(const Module &M) {
M.getPointerSize() != Module::AnyPointerSize)
return 0; // Match for some other target
return X86_32_JITMatchQuality()/2;
return 0;
}
Target llvm::TheX86_64Target;
static unsigned X86_64_JITMatchQuality() {
#if defined(__x86_64__) || defined(_M_AMD64)
return 10;
#endif
return 0;
}
static unsigned X86_64_TripleMatchQuality(const std::string &TT) {
// We strongly match "x86_64-*".
if (TT.size() >= 7 && TT[0] == 'x' && TT[1] == '8' && TT[2] == '6' &&
@ -81,7 +67,7 @@ static unsigned X86_64_ModuleMatchQuality(const Module &M) {
M.getPointerSize() != Module::AnyPointerSize)
return 0; // Match for some other target
return X86_64_JITMatchQuality()/2;
return 0;
}
extern "C" void LLVMInitializeX86TargetInfo() {
@ -89,11 +75,11 @@ extern "C" void LLVMInitializeX86TargetInfo() {
"32-bit X86: Pentium-Pro and above",
&X86_32_TripleMatchQuality,
&X86_32_ModuleMatchQuality,
&X86_32_JITMatchQuality);
/*HasJIT=*/true);
TargetRegistry::RegisterTarget(TheX86_64Target, "x86-64",
"64-bit X86: EM64T and AMD64",
&X86_64_TripleMatchQuality,
&X86_64_ModuleMatchQuality,
&X86_64_JITMatchQuality);
/*HasJIT=*/true);
}

7
lib/Target/XCore/TargetInfo/XCoreTargetInfo.cpp
View File

@ -14,10 +14,6 @@ using namespace llvm;
Target llvm::TheXCoreTarget;
static unsigned XCore_JITMatchQuality() {
return 0;
}
static unsigned XCore_TripleMatchQuality(const std::string &TT) {
if (TT.size() >= 6 && std::string(TT.begin(), TT.begin()+6) == "xcore-")
return 20;
@ -38,6 +34,5 @@ extern "C" void LLVMInitializeXCoreTargetInfo() {
TargetRegistry::RegisterTarget(TheXCoreTarget, "xcore",
"XCore",
&XCore_TripleMatchQuality,
&XCore_ModuleMatchQuality,
&XCore_JITMatchQuality);
&XCore_ModuleMatchQuality);
}