Evan Cheng c143dd4f63 Fix buggy fcopysign lowering. ... This define float @foo(float %x, float %y) nounwind readnone { entry: %0 = tail call float @copysignf(float %x, float %y) nounwind readnone ret float %0 } Was compiled to: vmov s0, r1 bic r0, r0, #-2147483648 vmov s1, r0 vcmpe.f32 s0, #0 vmrs apsr_nzcv, fpscr it lt vneglt.f32 s1, s1 vmov r0, s1 bx lr This fails to copy the sign of -0.0f because it's lost during the float to int conversion. Also, it's sub-optimal when the inputs are in GPR registers. Now it uses integer and + or operations when it's profitable. And it's correct! lsrs r1, r1, #31 bfi r0, r1, #31, #1 bx lr rdar://8984306 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125357 91177308-0d34-0410-b5e6-96231b3b80d8		2011-02-11 02:28:55 +00:00
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Analysis	Tolerate degenerate phi nodes that can occur in the middle of optimization	2011-02-10 23:54:10 +00:00
Archive	Archive: Fix temp path names.	2011-01-17 16:43:30 +00:00
AsmParser	implement .ll and .bc support for nsw/nuw on shl and exact on lshr/ashr.	2011-02-07 16:40:21 +00:00
Bitcode	implement .ll and .bc support for nsw/nuw on shl and exact on lshr/ashr.	2011-02-07 16:40:21 +00:00
CodeGen	After 3-addressifying a two-address instruction, update the register maps; add a missing check when considering whether it's profitable to commute. rdar://8977508.	2011-02-10 02:20:55 +00:00
CompilerDriver	Support/Path: Deprecate PathV1::exists and replace all uses with PathV2::fs::exists.	2011-01-10 02:34:23 +00:00
ExecutionEngine	Fix libffi usage when it is on a custom path.	2011-01-28 16:49:05 +00:00
Linker	Correctly merge available_externally and regular definitions when they have	2011-02-01 05:33:52 +00:00
MC	Fix comparator used for looking up previously instantiated EDDisassemblers.	2011-02-09 21:03:19 +00:00
Object	Object: Fix type punned pointer issues by making DataRefImpl a union and using intptr_t.	2011-01-21 02:27:02 +00:00
Support	Rip out realpath() support. It's expensive, and often a bad idea, and	2011-02-09 23:33:15 +00:00
Target	Fix buggy fcopysign lowering.	2011-02-11 02:28:55 +00:00
Transforms	If we can't avoid running loop-simplify twice for now, at least avoid running	2011-02-10 23:53:14 +00:00
VMCore	switch the constantexpr, target folder, and IRBuilder interfaces	2011-02-10 07:01:55 +00:00
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