6 Commits

Author	SHA1	Message	Date
Sanjay Patel	764ae8bd72	[x86] add folds for FP logic with vector zeros ... The 'or' case shows up in copysign. The copysign code also had redundant checking for a scalar zero operand with 'and', so I removed that. I'm not sure how to test vector 'and', 'andn', and 'xor' yet, but it seems better to just include all of the logic ops since we're fixing 'or' anyway. llvm-svn: 282546	2016-09-27 22:28:13 +00:00
Sanjay Patel	0b36337d61	[x86] fix FCOPYSIGN lowering to create constants instead of ConstantPool loads ... This is similar to: https://reviews.llvm.org/rL279958 By not prematurely lowering to loads, we should be able to more easily eliminate the 'or' with zero instructions seen in copysign-constant-magnitude.ll. We should also be able to extend this code to handle vectors. llvm-svn: 282312	2016-09-23 23:17:29 +00:00
Sanjay Patel	db3438abcb	[x86] split up tests, regenerate checks ... Note that we fail to eliminate 'or' with 0! llvm-svn: 282005	2016-09-20 19:31:30 +00:00
Craig Topper	9bd6241106	[X86] Remove the Fv packed logical operation alias instructions. Replace them with patterns to the regular instructions. ... This enables execution domain fixing which is why the tests changed. llvm-svn: 278090	2016-08-09 03:06:33 +00:00
Justin Bogner	3135ba9b38	AsmPrinter: Use emitGlobalConstantFP to emit elements of constant data ... It's strange to duplicate the logic for emitting FP values into emitGlobalConstantDataSequential, and it's even stranger that we end up printing the verbose assembly comments differently between the two paths. Just call into emitGlobalConstantFP rather than crudely duplicating its logic. llvm-svn: 254988	2015-12-08 02:37:48 +00:00
Ahmed Bougacha	aa2d290997	[X86] Teach FCOPYSIGN lowering to recognize constant magnitudes. ... For code like: float foo(float x) { return copysign(1.0, x); } We used to generate: andps <-0.000000e+00,0,0,0>, %xmm0 movss <1.000000e+00>, %xmm1 andps <nan>, %xmm1 orps %xmm0, %xmm1 Basically doing an abs(1.0f) in the two middle instructions. We now generate: andps <-0.000000e+00,0,0,0>, %xmm0 orps <1.000000e+00,0,0,0>, %xmm0 Builds on cleanups r223415, r223542. rdar://19049548 Differential Revision: http://reviews.llvm.org/D6555 llvm-svn: 225357	2015-01-07 17:33:03 +00:00