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Delete a FIXME which is no longer relevant, and add a FIXME that is.

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llvm-svn: 71033
This commit is contained in:
Dan Gohman 2009-05-05 22:59:55 +00:00
parent 0d781df8dc
commit c1169472a2
1 changed files with 3 additions and 2 deletions
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5
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -2464,8 +2464,9 @@ bool LoopStrengthReduce::runOnLoop(Loop *L, LPPassManager &LPM) {
// computation of some other indvar to decide when to terminate the loop.
OptimizeIndvars(L);
// FIXME: We can widen subreg IV's here for RISC targets. e.g. instead of
// doing computation in byte values, promote to 32-bit values if safe.
// FIXME: We can widen overlarge IV's here. e.g. if the code has
// computation in i64 values and the target doesn't support i64, demote
// the computation to 32-bit if safe.
// FIXME: Attempt to reuse values across multiple IV's. In particular, we
// could have something like "for(i) { foo(i*8); bar(i*16) }", which should