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Switch the PPC backend and target-independent JIT to use the libsystem

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InvalidateInstructionCache method instead of calling through
a hook on the JIT.  This is a host feature, not a target feature.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52734 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-06-25 17:18:44 +00:00
parent 95f39009aa
commit bc52cada09
4 changed files with 5 additions and 37 deletions
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5
include/llvm/Target/TargetJITInfo.h
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@ -94,11 +94,6 @@ namespace llvm {
assert(NumRelocs == 0 && "This target does not have relocations!"); assert(NumRelocs == 0 && "This target does not have relocations!");
} }
/// InvalidateInstructionCache - Before the JIT can run a block of code
// that has been emitted it must invalidate the instruction cache on some
// platforms.
virtual void InvalidateInstructionCache(const void *Addr, unsigned len) {}
/// needsGOT - Allows a target to specify that it would like the /// needsGOT - Allows a target to specify that it would like the
// JIT to manage a GOT for it. // JIT to manage a GOT for it.
bool needsGOT() const { return useGOT; } bool needsGOT() const { return useGOT; }

3
lib/ExecutionEngine/JIT/JITEmitter.cpp
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@ -32,6 +32,7 @@
#include "llvm/Support/Debug.h" #include "llvm/Support/Debug.h"
#include "llvm/Support/MutexGuard.h" #include "llvm/Support/MutexGuard.h"
#include "llvm/System/Disassembler.h" #include "llvm/System/Disassembler.h"
#include "llvm/System/Memory.h"
#include "llvm/Target/TargetInstrInfo.h" #include "llvm/Target/TargetInstrInfo.h"
#include "llvm/ADT/Statistic.h" #include "llvm/ADT/Statistic.h"
#include <algorithm> #include <algorithm>
@ -742,7 +743,7 @@ bool JITEmitter::finishFunction(MachineFunction &F) {
} }
// Invalidate the icache if necessary. // Invalidate the icache if necessary.
TheJIT->getJITInfo().InvalidateInstructionCache(FnStart, FnEnd-FnStart); sys::Memory::InvalidateInstructionCache(FnStart, FnEnd-FnStart);
// Add it to the JIT symbol table if the host wants it. // Add it to the JIT symbol table if the host wants it.
AddFunctionToSymbolTable(F.getFunction()->getNameStart(), AddFunctionToSymbolTable(F.getFunction()->getNameStart(),

29
lib/Target/PowerPC/PPCJITInfo.cpp
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@ -17,7 +17,7 @@
#include "PPCTargetMachine.h" #include "PPCTargetMachine.h"
#include "llvm/Function.h" #include "llvm/Function.h"
#include "llvm/CodeGen/MachineCodeEmitter.h" #include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/Config/alloca.h" #include "llvm/System/Memory.h"
#include "llvm/Support/Debug.h" #include "llvm/Support/Debug.h"
#include <set> #include <set>
using namespace llvm; using namespace llvm;
@ -330,29 +330,6 @@ defined(__APPLE__)
extern "C" void sys_icache_invalidate(const void *Addr, size_t len); extern "C" void sys_icache_invalidate(const void *Addr, size_t len);
#endif #endif
void PPCJITInfo::InvalidateInstructionCache(const void *Addr, unsigned len) {
#if (defined(__POWERPC__) || defined (__ppc__) || \
defined(_POWER) || defined(_ARCH_PPC))
# if defined(__APPLE__)
sys_icache_invalidate(Addr, len);
# elif defined(__GNUC__)
const size_t LineSize = 32;
const intptr_t Mask = ~(LineSize - 1);
const intptr_t StartLine = ((intptr_t) Addr) & Mask;
const intptr_t EndLine = ((intptr_t) Addr + len + LineSize - 1) & Mask;
for (intptr_t Line = StartLine; Line < EndLine; Line += LineSize)
asm volatile("dcbf 0, %0" : : "r"(Line));
asm volatile("sync");
for (intptr_t Line = StartLine; Line < EndLine; Line += LineSize)
asm volatile("icbi 0, %0" : : "r"(Line));
asm volatile("isync");
# endif
#endif
}
void *PPCJITInfo::emitFunctionStub(const Function* F, void *Fn, void *PPCJITInfo::emitFunctionStub(const Function* F, void *Fn,
MachineCodeEmitter &MCE) { MachineCodeEmitter &MCE) {
// If this is just a call to an external function, emit a branch instead of a // If this is just a call to an external function, emit a branch instead of a
@ -369,7 +346,7 @@ void *PPCJITInfo::emitFunctionStub(const Function* F, void *Fn,
MCE.emitWordBE(0); MCE.emitWordBE(0);
MCE.emitWordBE(0); MCE.emitWordBE(0);
EmitBranchToAt(Addr, (intptr_t)Fn, false, is64Bit); EmitBranchToAt(Addr, (intptr_t)Fn, false, is64Bit);
InvalidateInstructionCache((void*)Addr, 7*4); sys::Memory::InvalidateInstructionCache((void*)Addr, 7*4);
return MCE.finishFunctionStub(F); return MCE.finishFunctionStub(F);
} }
@ -397,7 +374,7 @@ void *PPCJITInfo::emitFunctionStub(const Function* F, void *Fn,
MCE.emitWordBE(0); MCE.emitWordBE(0);
MCE.emitWordBE(0); MCE.emitWordBE(0);
EmitBranchToAt(BranchAddr, (intptr_t)Fn, true, is64Bit); EmitBranchToAt(BranchAddr, (intptr_t)Fn, true, is64Bit);
InvalidateInstructionCache((void*)Addr, 10*4); sys::Memory::InvalidateInstructionCache((void*)Addr, 10*4);
return MCE.finishFunctionStub(F); return MCE.finishFunctionStub(F);
} }

5
lib/Target/PowerPC/PPCJITInfo.h
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@ -41,11 +41,6 @@ namespace llvm {
/// code. /// code.
/// ///
virtual void replaceMachineCodeForFunction(void *Old, void *New); virtual void replaceMachineCodeForFunction(void *Old, void *New);
/// InvalidateInstructionCache - Before the JIT can run a block of code
// that has been emitted it must invalidate the instruction cache on some
// platforms.
virtual void InvalidateInstructionCache(const void *Addr, unsigned len);
}; };
} }