[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/lifetime.ll b/llvm/test/Transforms/LoopVectorize/lifetime.ll
index 63bde5a..6e525ca 100644
--- a/llvm/test/Transforms/LoopVectorize/lifetime.ll
+++ b/llvm/test/Transforms/LoopVectorize/lifetime.ll
@@ -20,7 +20,7 @@
   %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
   call void @llvm.lifetime.end(i64 4096, i8* %0) #1
   %arrayidx = getelementptr inbounds i32, i32* %d, i64 %indvars.iv
-  %1 = load i32* %arrayidx, align 8
+  %1 = load i32, i32* %arrayidx, align 8
   store i32 100, i32* %arrayidx, align 8
   call void @llvm.lifetime.start(i64 4096, i8* %0) #1
   %indvars.iv.next = add i64 %indvars.iv, 1
@@ -50,7 +50,7 @@
   %1 = bitcast [1024 x i32]* %arr to i8*
   call void @llvm.lifetime.end(i64 4096, i8* %1) #1
   %arrayidx = getelementptr inbounds i32, i32* %d, i64 %indvars.iv
-  %2 = load i32* %arrayidx, align 8
+  %2 = load i32, i32* %arrayidx, align 8
   store i32 100, i32* %arrayidx, align 8
   call void @llvm.lifetime.start(i64 4096, i8* %1) #1
   %indvars.iv.next = add i64 %indvars.iv, 1
@@ -79,7 +79,7 @@
   %1 = bitcast [1024 x i32]* %arr to i8*
   call void @llvm.lifetime.end(i64 4096, i8* %1) #1
   %arrayidx = getelementptr inbounds i32, i32* %d, i64 %indvars.iv
-  %2 = load i32* %arrayidx, align 8
+  %2 = load i32, i32* %arrayidx, align 8
   store i32 100, i32* %arrayidx, align 8
   call void @llvm.lifetime.start(i64 4096, i8* %1) #1
   %indvars.iv.next = add i64 %indvars.iv, 1