[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
diff --git a/llvm/test/Transforms/LoopVectorize/increment.ll b/llvm/test/Transforms/LoopVectorize/increment.ll
index 369bd38..d0b2509 100644
--- a/llvm/test/Transforms/LoopVectorize/increment.ll
+++ b/llvm/test/Transforms/LoopVectorize/increment.ll
@@ -21,7 +21,7 @@
 .lr.ph:                                           ; preds = %0, %.lr.ph
   %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
   %2 = getelementptr inbounds [2048 x i32], [2048 x i32]* @a, i64 0, i64 %indvars.iv
-  %3 = load i32* %2, align 4
+  %3 = load i32, i32* %2, align 4
   %4 = trunc i64 %indvars.iv to i32
   %5 = add nsw i32 %3, %4
   store i32 %5, i32* %2, align 4
@@ -50,10 +50,10 @@
 for.body:                                         ; preds = %entry, %for.body
   %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
   %arrayidx = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
-  %0 = load i32* %arrayidx, align 4
+  %0 = load i32, i32* %arrayidx, align 4
   %idxprom1 = sext i32 %0 to i64
   %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %idxprom1
-  %1 = load i32* %arrayidx2, align 4
+  %1 = load i32, i32* %arrayidx2, align 4
   %inc = add nsw i32 %1, 1
   store i32 %inc, i32* %arrayidx2, align 4
   %indvars.iv.next = add i64 %indvars.iv, 1