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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

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 ; RUN: opt < %s -basicaa -gvn -instcombine -S | FileCheck %s
 @flag0 = internal global i32 zeroinitializer
 @turn = internal global i32 zeroinitializer
 ; CHECK: ret i32 0
 define i32 @main() {
   %a = load i32, i32* @flag0
   %b = atomicrmw xchg i32* @turn, i32 1 monotonic
   %c = load i32, i32* @flag0
   %d = sub i32 %a, %c
   ret i32 %d
 }