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2 Commits

Author SHA1 Message Date
Jingu Kang 8eee02020b [LoopBoundSplit] Ignore phi node which is not scevable 
There was a bug in LoopBoundSplit. The pass should ignore phi node which is not
scevable.

Differential Revision: https://reviews.llvm.org/D103913
 2021-06-09 09:44:36 +01:00
Jingu Kang a2a0ac42ab [SimpleLoopBoundSplit] Split Bound of Loop which has conditional branch with IV 
This pass transforms loops that contain a conditional branch with induction
variable. For example, it transforms left code to right code:

                             newbound = min(n, c)
 while (iv < n) {            while(iv < newbound) {
   A                           A
   if (iv < c)                 B
     B                         C
   C                         }
 }                           if (iv != n) {
                               while (iv < n) {
                                 A
                                 C
                               }
                             }

Differential Revision: https://reviews.llvm.org/D102234
 2021-06-07 10:55:25 +01:00