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avoid clobbering values in sign-extension case of MoveEvent.compile

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This commit is contained in:
Joel Dice 2009-02-02 19:13:02 -07:00
parent 6297c8a906
commit 55d2ee1823
1 changed files with 22 additions and 1 deletions
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23
src/compiler.cpp
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@ -2534,16 +2534,38 @@ class MoveEvent: public Event {
Site* low = freeRegisterSite(c, dstLowMask.registerMask);
src->source->freeze(c, src);
addSite(c, dst, low);
src->source->thaw(c, src);
if (DebugMoves) {
char srcb[256]; src->source->toString(c, srcb, 256);
char dstb[256]; low->toString(c, dstb, 256);
fprintf(stderr, "move %s to %s for %p\n",
srcb, dstb, src);
}
apply(c, Move, BytesPerWord, src->source, 0, BytesPerWord, low, 0);
assert(c, dstHighMask.typeMask & (1 << RegisterOperand));
Site* high = freeRegisterSite(c, dstHighMask.registerMask);
low->freeze(c, dst);
addSite(c, dst->high, high);
low->thaw(c, dst);
if (DebugMoves) {
char srcb[256]; low->toString(c, srcb, 256);
char dstb[256]; high->toString(c, dstb, 256);
fprintf(stderr, "extend %s to %s for %p %p\n",
srcb, dstb, dst, dst->high);
}
apply(c, Move, BytesPerWord, low, 0, dstSize, low, high);
} else {
maybeMove(c, Move, BytesPerWord, src, BytesPerWord, dst, dstLowMask);
@ -2762,7 +2784,6 @@ class CombineEvent: public Event {
if (resultSize > BytesPerWord) {
grow(c, result);
fprintf(stderr, "grew %p into %p\n", result, result->high);
}
}