diff options
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index 4365adc..94c9d9b 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -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 |