start work on comparisons
There are two things I overlooked so far. 1. Binary instructions like cmp that do not have a result in registers need the size suffix sometimes, for example when comparing a spill location with a constant. 2. The register allocator needs to be adapted to support the comparison instruction: it is not possible to compare two spill locations without using a register.
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6 changed files with 109 additions and 22 deletions
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@ -38,7 +38,7 @@ tmpuse(Ref r, int use, int loop, Fn *fn)
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return;
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t = &fn->tmp[r.val];
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t->nuse += use;
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t->ndef += 1 - use;
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t->ndef += !use;
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t->cost += loop;
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}
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