* Move stub allocation inside the JITEmitter, instead of exposing a
way for each TargetJITInfo subclass to allocate its own stubs. This
means stubs aren't as exactly-sized anymore, but it lets us get rid of
TargetJITInfo::emitFunctionStubAtAddr(), which lets ARM and PPC
support the eager JIT, fixing http://llvm.org/PR4816.
* Rename the JITEmitter's stub creation functions to describe the kind
of stub they create. So far, all of them create lazy-compilation
stubs, but they sometimes get used when far-call stubs are needed.
Fixing http://llvm.org/PR5201 will involve fixing this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89715 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaJITInfo.cpp b/lib/Target/Alpha/AlphaJITInfo.cpp
index 4e59833..b3b711e 100644
--- a/lib/Target/Alpha/AlphaJITInfo.cpp
+++ b/lib/Target/Alpha/AlphaJITInfo.cpp
@@ -190,18 +190,27 @@
#endif
}
+TargetJITInfo::StubLayout AlphaJITInfo::getStubLayout() {
+ // The stub contains 19 4-byte instructions, aligned at 4 bytes:
+ // R0 = R27
+ // 8 x "R27 <<= 8; R27 |= 8-bits-of-Target" == 16 instructions
+ // JMP R27
+ // Magic number so the compilation callback can recognize the stub.
+ StubLayout Result = {19 * 4, 4};
+ return Result;
+}
+
void *AlphaJITInfo::emitFunctionStub(const Function* F, void *Fn,
JITCodeEmitter &JCE) {
MachineCodeEmitter::BufferState BS;
//assert(Fn == AlphaCompilationCallback && "Where are you going?\n");
//Do things in a stupid slow way!
- JCE.startGVStub(BS, F, 19*4);
void* Addr = (void*)(intptr_t)JCE.getCurrentPCValue();
for (int x = 0; x < 19; ++ x)
JCE.emitWordLE(0);
EmitBranchToAt(Addr, Fn);
DEBUG(errs() << "Emitting Stub to " << Fn << " at [" << Addr << "]\n");
- return JCE.finishGVStub(BS);
+ return Addr;
}
TargetJITInfo::LazyResolverFn