Andrea Di Biagio f033db57e9 [TTI] Improved cost heuristic for cttz/ctlz calls. ... This patch is a follow-up of r228826 (see code-review: D7506). Now that SimplifyCFG uses TargetTransformInfo for cost analysis, we have to fix the cost heuristic for intrinsic calls to cttz/ctlz. This patch defines method 'getIntrinsicCost' in BasicTTIImpl: now, BasicTTIImpl queries TLI to check if a call to cttz/ctlz is cheap for the target. Added test cases in Transforms/SimplifyCFG/X86 to verify that on x86, SimplifyCFG only speculates a call to cttz/ctlz if it is cheap. Differential Revision: http://reviews.llvm.org/D7554 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228829 91177308-0d34-0410-b5e6-96231b3b80d8		2015-02-11 14:22:18 +00:00
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llvm	[TTI] Improved cost heuristic for cttz/ctlz calls.	2015-02-11 14:22:18 +00:00
llvm-c	Fix warning: "function declaration isn’t a prototype"	2015-02-04 13:30:28 +00:00