[PATCH] D50633: [AMDGPU] Add new Mode Register pass

[Nicolai Hähnle via Phabricator via llvm-commits]

nhaehnle added inline comments.


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Comment at: lib/Target/AMDGPU/SIModeRegister.cpp:243-246
+      if (NewInfo->Change.isCompatible(InstrMode)) {
+        // This instruction is compatible, so just merge the mode
+        NewInfo->Change = NewInfo->Change.merge(InstrMode);
+      } else {
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nhaehnle wrote:
> Hasn't this become redundant now?
Okay, no, I see how it isn't redundant if there's a pre-existing s_setreg.

But why the call to merge? isCompatible only returns true if InstrMode is a subset of the known bits of NewInfo->Change.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D50633/new/

https://reviews.llvm.org/D50633