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Author SHA1 Message Date
James Molloy b564098c62 [ARM] Replace ARMISD::RBIT with ISD::BITREVERSE 
ISD::BITREVERSE matches "rbit" completely, so remove ARMISD::RBIT and mark ISD::BITREVERSE as legal, adding a test for lowering.

llvm-svn: 253047
 2015-11-13 16:05:22 +00:00
Yi Kong c655f0c898 ARM: Fix codegen for rbit intrinsic 
LLVM generates illegal `rbit r0, #352` instruction for rbit intrinsic.
According to ARM ARM, rbit only takes register as argument, not immediate.
The correct instruction should be rbit <Rd>, <Rm>.

The bug was originally introduced in r211057.

Differential Revision: http://reviews.llvm.org/D4980

llvm-svn: 216064
 2014-08-20 10:40:20 +00:00