[PATCH] D21941: AMDGPU: Set isConvergent on v_cmpx* instructions

[Matt Arsenault via llvm-commits]

arsenm added inline comments.

================
Comment at: lib/Target/AMDGPU/SIInstrInfo.td:2294
@@ -2293,1 +2293,3 @@
     let SchedRW = sched;
+    let hasSideEffects = DefExec;
+    let isConvergent = DefExec;
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tstellarAMD wrote:
> Why do we need to set hasSideEffects here?
It seems like writing to exec should count as a side effect, although currently the realgar bit instruction manipulations will not have this set


http://reviews.llvm.org/D21941