Sanjay Patel dc18ebc4b1 Shrinkify libcalls: use float versions of double libm functions with fast-math (bug 17850) ... When a call to a double-precision libm function has fast-math semantics (via function attribute for now because there is no IR-level FMF on calls), we can avoid fpext/fptrunc operations and use the float version of the call if the input and output are both float. We already do this optimization using a command-line option; this patch just adds the ability for fast-math to use the existing functionality. I moved the cl::opt from InstructionCombining into SimplifyLibCalls because it's only ever used internally to that class. Modified the existing test cases to use the unsafe-fp-math attribute rather than repeating all tests. This patch should solve: http://llvm.org/bugs/show_bug.cgi?id=17850 Differential Revision: http://reviews.llvm.org/D5893 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220390 91177308-0d34-0410-b5e6-96231b3b80d8		2014-10-22 15:29:23 +00:00
..
ASanStackFrameLayout.h
BasicBlockUtils.h
BuildLibCalls.h
BypassSlowDivision.h
Cloning.h	Add an Assumption-Tracking Pass	2014-09-07 12:44:26 +00:00
CmpInstAnalysis.h
CodeExtractor.h
CtorUtils.h
GlobalStatus.h
IntegerDivision.h
Local.h	[SimplifyCFG] threshold for folding branches with common destination	2014-09-30 22:23:38 +00:00
LoopUtils.h	Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.)	2014-09-07 18:57:58 +00:00
ModuleUtils.h	Repace SmallPtrSet with SmallPtrSetImpl in function arguments to avoid needing to mention the size.	2014-08-21 05:55:13 +00:00
PromoteMemToReg.h	Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.)	2014-09-07 18:57:58 +00:00
SimplifyIndVar.h
SimplifyLibCalls.h	Shrinkify libcalls: use float versions of double libm functions with fast-math (bug 17850)	2014-10-22 15:29:23 +00:00
SSAUpdater.h	Reformat blank lines.	2014-05-19 04:43:26 +00:00
SSAUpdaterImpl.h
UnifyFunctionExitNodes.h
UnrollLoop.h	Add an Assumption-Tracking Pass	2014-09-07 12:44:26 +00:00
ValueMapper.h
VectorUtils.h	Add minnum / maxnum intrinsics	2014-10-21 23:00:20 +00:00