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

Tom Stellard via llvm-commits llvm-commits at lists.llvm.org
Mon Mar 21 10:28:15 PDT 2016

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
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.



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