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pick a temporary register which is valid as both a destination and a source for the required moves in maybeMove

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This commit is contained in:
Joel Dice 2009-03-01 15:41:03 -07:00
parent 1192ef939e
commit 97961ecdde
1 changed files with 16 additions and 2 deletions
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18
src/compiler.cpp
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@ -2459,9 +2459,23 @@ maybeMove(Context* c, BinaryOperation type, unsigned srcSize, Value* src,
} else {
target->freeze(c, dst);
assert(c, dstMask.typeMask & (1 << RegisterOperand));
// pick a temporary register which is valid as both a
// destination and a source for the moves we need to perform:
Site* tmpTarget = freeRegisterSite(c, dstMask.registerMask);
bool thunk;
uint8_t srcTypeMask;
uint64_t srcRegisterMask;
uint8_t dstTypeMask;
uint64_t dstRegisterMask;
c->arch->plan(type, dstSize, &srcTypeMask, &srcRegisterMask,
dstSize, &dstTypeMask, &dstRegisterMask,
&thunk);
assert(c, dstMask.typeMask & srcTypeMask & (1 << RegisterOperand));
Site* tmpTarget = freeRegisterSite
(c, dstMask.registerMask & srcRegisterMask);
addSite(c, dst, tmpTarget);