[PATCH] D29639: [SelectionDAG] Add a signed integer absolute ISD node
James Molloy via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Feb 21 06:43:44 PST 2017
jmolloy added a subscriber: jgreenhalgh.
jmolloy added a comment.
Hi,
Having asked around: The way we define this is that the VABS instruction takes a signed integer and outputs an unsigned integer, getting around this problem.
However, I believe the output of VABS(INT_MIN) is indeed bit-identical to INT_MIN.
+ @jgreenhalgh to confirm I haven't mangled his explanation.
James
Repository:
rL LLVM
https://reviews.llvm.org/D29639
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