Chandler Carruth 36ae8103b1 [Unrolling] Refactor the start and step offsets to simplify overflow ... checking and make the cache faster and smaller. I had thought that using an APInt here would be useful, but I think I was just wrong. Notably, we don't have to do any fancy overflow checking, we can just bound the values as quite small and do the math in a higher precision integer. I've switched to a signed integer so that UBSan will even point out if we ever have integer overflow. I've added various asserts to try to catch things as well and hoisted the overflow checks so that we just leave the too-large offsets out of the SCEV-GEP cache. This makes the value in the cache quite a bit smaller which is probably worthwhile. No functionality changed here (for trip counts under 1 billion). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237209 91177308-0d34-0410-b5e6-96231b3b80d8		2015-05-12 23:32:56 +00:00
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Hello
InstCombine	Convert PHI getIncomingValue() to foreach over incoming_values(). NFC.	2015-05-12 20:05:31 +00:00
Instrumentation	InstrProf: Update name of compiler-rt routine for setting filename	2015-05-12 21:23:09 +00:00
IPO	MergeFunctions: Two different sized allocas are *not* the same	2015-05-12 21:42:22 +00:00
ObjCARC	Convert PHI getIncomingValue() to foreach over incoming_values(). NFC.	2015-05-12 20:05:31 +00:00
Scalar	[Unrolling] Refactor the start and step offsets to simplify overflow	2015-05-12 23:32:56 +00:00
Utils	Convert PHI getIncomingValue() to foreach over incoming_values(). NFC.	2015-05-12 20:05:31 +00:00
Vectorize	[X86] Disable loop unrolling in loop vectorization pass when VF is 1.	2015-05-06 17:12:25 +00:00
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