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Force the intregs ptr into R2 and the FPregs ptr into R3. This fixes a really

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obscure problem where we were doing:

lmw     r3,0(r9)

which is undefined on PPC.  Now we do:

lmw     r3,0(r2)

by force, not relying on the GCC register allocator for luck :)

llvm-svn: 18212
This commit is contained in:
Chris Lattner 2004-11-24 17:42:55 +00:00
parent 1c55479db5
commit 8cd0215f14
1 changed files with 8 additions and 4 deletions
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12
lib/Target/PowerPC/PPC32JITInfo.cpp
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@ -62,6 +62,7 @@ static void CompilationCallback() {
"stfd f7, 48(%1)\n" "stfd f8, 56(%1)\n" "stfd f9, 64(%1)\n"
"stfd f10, 72(%1)\n" "stfd f11, 80(%1)\n" "stfd f12, 88(%1)\n"
"stfd f13, 96(%1)\n" :: "b" (IntRegs), "b" (FPRegs) );
/// FIXME: Need to safe and restore the rest of the FP regs!
#endif
unsigned *CameFromStub = (unsigned*)__builtin_return_address(0);
@ -104,24 +105,27 @@ static void CompilationCallback() {
// Put the address of the stub and the LR value that originally came into the
// stub in a place that is easy to get on the stack after we restore all regs.
CCStackPtr[2] = (intptr_t)CameFromStub;
CCStackPtr[2] = (intptr_t)Target;
CCStackPtr[1] = (intptr_t)CameFromOrig;
// Note, this is not a standard epilog!
#if defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)
register unsigned *IRR asm ("r2") = IntRegs;
register double *FRR asm ("r3") = FPRegs;
__asm__ __volatile__ (
"lfd f1, 0(%0)\n" "lfd f2, 8(%0)\n" "lfd f3, 16(%0)\n"
"lfd f4, 24(%0)\n" "lfd f5, 32(%0)\n" "lfd f6, 40(%0)\n"
"lfd f7, 48(%0)\n" "lfd f8, 56(%0)\n" "lfd f9, 64(%0)\n"
"lfd f10, 72(%0)\n" "lfd f11, 80(%0)\n" "lfd f12, 88(%0)\n"
"lfd f13, 96(%0)\n" "lmw r3, 0(%1)\n"
"lfd f13, 96(%0)\n"
"lmw r3, 0(%1)\n" // Load all integer regs
"lwz r0,4(r1)\n" // Get CameFromOrig (LR into stub)
"mtlr r0\n" // Put it in the LR register
"lwz r0,8(r1)\n" // Get "CameFromStub"
"lwz r0,8(r1)\n" // Get target function pointer
"mtctr r0\n" // Put it into the CTR register
"lwz r1,0(r1)\n" // Pop two frames off
"bctr\n" :: // Return to stub!
"b" (FPRegs), "b" (IntRegs));
"b" (FRR), "b" (IRR));
#endif
}