[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/CodeGen/PowerPC/isel-rc-nox0.ll b/llvm/test/CodeGen/PowerPC/isel-rc-nox0.ll
index df0116d..7475e12 100644
--- a/llvm/test/CodeGen/PowerPC/isel-rc-nox0.ll
+++ b/llvm/test/CodeGen/PowerPC/isel-rc-nox0.ll
@@ -17,7 +17,7 @@
 
 crc32_gentab.exit:                                ; preds = %for.cond1.preheader.i
   %tobool.i19.i.i = icmp eq i32 undef, 0
-  %retval.0.i.i.i = select i1 %tobool.i19.i.i, i32* getelementptr inbounds ([1 x [9 x i32]]* @g_62, i64 0, i64 0, i64 6), i32* getelementptr inbounds ([1 x [9 x i32]]* @g_62, i64 0, i64 0, i64 8)
+  %retval.0.i.i.i = select i1 %tobool.i19.i.i, i32* getelementptr inbounds ([1 x [9 x i32]], [1 x [9 x i32]]* @g_62, i64 0, i64 0, i64 6), i32* getelementptr inbounds ([1 x [9 x i32]], [1 x [9 x i32]]* @g_62, i64 0, i64 0, i64 8)
   br label %for.cond1.preheader.i2961.i
 
 for.cond1.preheader.i2961.i:                      ; preds = %for.inc44.i2977.i, %crc32_gentab.exit