[PATCH] D31000: AMDGPU: Fix handling of constant phi input loop conditions

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added subscribers: tpr, dstuttard, tony-tye, yaxunl, nhaehnle, wdng, kzhuravl.

If the loop condition was an i1 phi with a constantexpr input, this
would add a loop intrinsic fed by a phi dependent on a call to
if.break in the same block. Insert the call in the loop header.


https://reviews.llvm.org/D31000

Files:
  lib/Target/AMDGPU/SIAnnotateControlFlow.cpp
  test/CodeGen/AMDGPU/loop_break.ll

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