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Commit Graph

4 Commits

Author SHA1 Message Date
Geoff Berry
584b69e94e [AArch64] Optimize some simple TBZ/TBNZ cases.
Summary:
Add some AArch64 dag combines to optimize some simple TBZ/TBNZ cases:

 (tbz (and x, m), b) -> (tbz x, b)
 (tbz (shl x, c), b) -> (tbz x, b-c)
 (tbz (shr x, c), b) -> (tbz x, b+c)
 (tbz (xor x, -1), b) -> (tbnz x, b)

Reviewers: jmolloy, mcrosier, t.p.northover

Subscribers: aemerson, rengolin, llvm-commits

Differential Revision: http://reviews.llvm.org/D15702

llvm-svn: 256765
2016-01-04 18:55:47 +00:00
David Blaikie
ab043ff680 [opaque pointer type] Add textual IR support for explicit type parameter to load instruction
Essentially the same as the GEP change in r230786.

A similar migration script can be used to update test cases, though a few more
test case improvements/changes were required this time around: (r229269-r229278)

import fileinput
import sys
import re

pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)")

for line in sys.stdin:
  sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line))

Reviewers: rafael, dexonsmith, grosser

Differential Revision: http://reviews.llvm.org/D7649

llvm-svn: 230794
2015-02-27 21:17:42 +00:00
Chad Rosier
f6bd4ee872 [AArch64] Fix test from r214518 in an attempt to appease buildbots.
llvm-svn: 214521
2014-08-01 15:30:41 +00:00
Chad Rosier
69caabf908 [AArch64] Generate tbz/tbnz when comparing against zero.
The tbz/tbnz checks the sign bit to convert

op w1, w1, w10
cmp w1, #0
b.lt .LBB0_0

to

op w1, w1, w10
tbnz w1, #31, .LBB0_0

Differential Revision: http://reviews.llvm.org/D4440

llvm-svn: 214518
2014-08-01 14:48:56 +00:00