[PATCH] D16809: [JumpThreading] See through Cast Instructions
Geoff Berry via llvm-commits
llvm-commits at lists.llvm.org
Fri Feb 5 11:01:26 PST 2016
gberry added inline comments.
Comment at: test/Transforms/JumpThreading/basic.ll:493
@@ +492,3 @@
+ %B = phi i32 [1, %Entry], [%v1, %F1]
It seems like this change to JumpThreading would not be needed if the Merge block code had been simplified to the following:
%B = phi i32 [1, %Entry], [%v1, %F1]
%M = icmp eq i32 %B, 0
br i1 %M, label %T2, label %F2
Are we missing this simplification, or is there something more complex going on in the code this was extracted from that prevents it from happening?
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