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Author SHA1 Message Date
Matt Arsenault 51c2ad77cd RegAllocFast: Remove early selection loop, the spill calculation will report cost 0 anyway for free regs 
The 2nd loop calculates spill costs but reports free registers as cost
0 anyway, so there is little benefit from having a separate early
loop.

Surprisingly this is not NFC, as many register are marked regDisabled
so the first loop often picks up later registers unnecessarily instead
of the first one available in the allocation order...

Patch by Matthias Braun

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356499 91177308-0d34-0410-b5e6-96231b3b80d8
 2019-03-19 19:01:34 +00:00
Quentin Colombet d57216e763 [ARM][TEST] Strengthen test against smarter reg alloc. 
Follow-up of r236247.

rdar://problem/20770899


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236296 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-01 00:45:55 +00:00
Quentin Colombet 131da40ffd [ARM] Do not generate invalid encoding for stack adjust, even if this is just 
temporary.

Because of that:
1. The machine verifier was complaining on such code.
2. The generate code worked just because the thumb reduction size pass fixed the
opcode.

rdar://problem/20749824


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236247 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-04-30 18:52:49 +00:00