[PATCH] D15302: [Greedy regalloc] Replace analyzeSiblingValues with something new [Part1]

[Tom Stellard via llvm-commits]

tstellarAMD added inline comments.

================
Comment at: test/CodeGen/AMDGPU/vgpr-spill-emergency-stack-slot.ll:24
@@ -23,3 +23,3 @@
 
-; GCN: NumVgprs: 256
+; GCN: NumVgprs: 254
 ; GCN: ScratchSize: 1024
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This is change confusing to me, because if we only use 254 VGPRs then there shouldn't be any spills, but there are still spill instructions being emitted.  It seems like this is probably a bug, but I will need to look at it more closely to see if it is an AMDGPU bug or a generic regalloc bug.


Repository:
  rL LLVM

http://reviews.llvm.org/D15302