[opaque pointer type] Add textual IR support for explicit type parameter to gep operator

Similar to gep (r230786) and load (r230794) changes.

Similar migration script can be used to update test cases, which
successfully migrated all of LLVM and Polly, but about 4 test cases
needed manually changes in Clang.

(this script will read the contents of stdin and massage it into stdout
- wrap it in the 'apply.sh' script shown in previous commits + xargs to
apply it over a large set of test cases)

import fileinput
import sys
import re

rep = re.compile(r"(getelementptr(?:\s+inbounds)?\s*\()((<\d*\s+x\s+)?([^@]*?)(|\s*addrspace\(\d+\))\s*\*(?(3)>)\s*)(?=$|%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|zeroinitializer|<|\[\[[a-zA-Z]|\{\{)", re.MULTILINE | re.DOTALL)

def conv(match):
  line = match.group(1)
  line += match.group(4)
  line += ", "
  line += match.group(2)
  return line

line = sys.stdin.read()
off = 0
for match in re.finditer(rep, line):
  sys.stdout.write(line[off:match.start()])
  sys.stdout.write(conv(match))
  off = match.end()
sys.stdout.write(line[off:])

llvm-svn: 232184
diff --git a/llvm/test/Bitcode/old-aliases.ll b/llvm/test/Bitcode/old-aliases.ll
index b73b1a9..8527f07 100644
--- a/llvm/test/Bitcode/old-aliases.ll
+++ b/llvm/test/Bitcode/old-aliases.ll
@@ -13,8 +13,8 @@
 @v3 = alias bitcast (i32* @v1 to i16*)
 ; CHECK: @v3 = alias bitcast (i32* @v1 to i16*)
 
-@v4 = alias getelementptr ([1 x i32]* @v2, i32 0, i32 0)
-; CHECK: @v4 = alias getelementptr inbounds ([1 x i32]* @v2, i32 0, i32 0)
+@v4 = alias getelementptr ([1 x i32], [1 x i32]* @v2, i32 0, i32 0)
+; CHECK: @v4 = alias getelementptr inbounds ([1 x i32], [1 x i32]* @v2, i32 0, i32 0)
 
 @v5 = alias i32 addrspace(2)* addrspacecast (i32 addrspace(0)* @v1 to i32 addrspace(2)*)
 ; CHECK: @v5 = alias addrspacecast (i32* @v1 to i32 addrspace(2)*)