Sanjay Patel d8214db086 fold: sqrt(x * x * y) -> fabs(x) * sqrt(y) ... If a square root call has an FP multiplication argument that can be reassociated, then we can hoist a repeated factor out of the square root call and into a fabs(). In the simplest case, this: y = sqrt(x * x); becomes this: y = fabs(x); This patch relies on an earlier optimization in instcombine or reassociate to put the multiplication tree into a canonical form, so we don't have to search over every permutation of the multiplication tree. Because there are no IR-level FastMathFlags for intrinsics (PR21290), we have to use function-level attributes to do this optimization. This needs to be fixed for both the intrinsics and in the backend. Differential Revision: http://reviews.llvm.org/D5787 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219944 91177308-0d34-0410-b5e6-96231b3b80d8		2014-10-16 18:48:17 +00:00
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Analysis	[CFL-AA] CFL-AA should not assert on an va_arg instruction	2014-10-14 20:51:26 +00:00
Assembler
Bindings
Bitcode
BugPoint
CodeGen	[AArch64] Fix miscompile of sdiv-by-power-of-2.	2014-10-16 16:41:15 +00:00
DebugInfo	[dwarfdump] Prettyprint DW_AT_APPLE_property_attribute bitfield values.	2014-10-10 15:51:10 +00:00
ExecutionEngine
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Instrumentation	[asan-asm-instrumentation] Fixed memory references which includes %rsp as a base or an index register.	2014-10-13 09:37:47 +00:00
Integer
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MC	[mips] Marked the DI/EI instruction aliases as MIPS32r2	2014-10-16 15:23:52 +00:00
Object	Suppress llvm-ar's MRI tests for now on win32, since line_iterator is incompatible to CRLF.	2014-10-11 22:21:27 +00:00
Other
TableGen
tools	[llvm-objdump] Update error message and add test case for mach-o file with bad library ordinals	2014-10-14 23:29:38 +00:00
Transforms	fold: sqrt(x * x * y) -> fabs(x) * sqrt(y)	2014-10-16 18:48:17 +00:00
Unit
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