Matthias Braun e152c1527d InstCombine: Restrict computeKnownBits() on all Values to OptLevel > 2 ... As part of r251146 InstCombine was extended to call computeKnownBits on every value in the function to determine whether it happens to be constant. This increases typical compiletime by 1-3% (5% in irgen+opt time) in my measurements. On the other hand this case did not trigger once in the whole llvm-testsuite. This patch introduces the notion of ExpensiveCombines which are only enabled for OptLevel > 2. I removed the check in InstructionSimplify as that is called from various places where the OptLevel is not known but given the rarity of the situation I think a check in InstCombine is enough. Differential Revision: http://reviews.llvm.org/D16835 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263047 91177308-0d34-0410-b5e6-96231b3b80d8		2016-03-09 18:47:11 +00:00
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llvm	InstCombine: Restrict computeKnownBits() on all Values to OptLevel > 2	2016-03-09 18:47:11 +00:00
llvm-c	Use lto_bool_t instead of a raw bool (fixup for r262977).	2016-03-09 04:05:28 +00:00