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Author SHA1 Message Date
Matt Arsenault c2e35a6f32 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

llvm-svn: 356499
 2019-03-19 19:01:34 +00:00
Quentin Colombet 65b5b01d56 [ARM][TEST] Strengthen test against smarter reg alloc. 
Follow-up of r236247.

rdar://problem/20770899

llvm-svn: 236296
 2015-05-01 00:45:55 +00:00
Quentin Colombet 0a905042cd [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

llvm-svn: 236247
 2015-04-30 18:52:49 +00:00