4 Commits

Author	SHA1	Message	Date
Kai Luo	44bd8ea167	[DAGCombine][PowerPC] Simplify nabs by using legal smin operation ... Convert `0 - abs(x)` to `smin (x, -x)` if `smin` is a legal operation. Verification: https://alive2.llvm.org/ce/z/vpquFR Reviewed By: RKSimon Differential Revision: https://reviews.llvm.org/D92637	2020-12-08 03:24:07 +00:00
Kai Luo	f5d52916ce	[PowerPC] Pre-commit neg abs test for vector. NFC.	2020-12-04 06:52:05 +00:00
Kai Luo	5931be60b5	[DAGCombine][PowerPC] Convert negated abs to trivial arithmetic ops ... This patch converts `0 - abs(x)` to `Y = sra (X, size(X)-1); sub (Y, xor (X, Y))` for better codegen. Reviewed By: RKSimon Differential Revision: https://reviews.llvm.org/D91120	2020-11-24 09:43:35 +00:00
Kai Luo	c2460c3254	[PowerPC] Add negated abs test using llvm.abs intrinsic. NFC.	2020-11-17 09:28:56 +00:00