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Author SHA1 Message Date
Tim Northover 33d07468bc ARM64: fix fmsub patterns which assumed accum operand was first 
Confusingly, the NEON fmla instructions put the accumulator first but the
scalar versions put it at the end (like the fma lib function & LLVM's
intrinsic).

This should fix PR19345, assuming there's only one issue.

llvm-svn: 205758
 2014-04-08 12:23:51 +00:00
Tim Northover 5731fc75af ARM64: add more patterns for commuted fmsub operations. 
llvm-svn: 205206
 2014-03-31 15:46:34 +00:00
Tim Northover 00ed9964c6 ARM64: initial backend import 
This adds a second implementation of the AArch64 architecture to LLVM,
accessible in parallel via the "arm64" triple. The plan over the
coming weeks & months is to merge the two into a single backend,
during which time thorough code review should naturally occur.

Everything will be easier with the target in-tree though, hence this
commit.

llvm-svn: 205090
 2014-03-29 10:18:08 +00:00