[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/BBVectorize/mem-op-depth.ll b/llvm/test/Transforms/BBVectorize/mem-op-depth.ll
index c31d452..c181c68 100644
--- a/llvm/test/Transforms/BBVectorize/mem-op-depth.ll
+++ b/llvm/test/Transforms/BBVectorize/mem-op-depth.ll
@@ -7,11 +7,11 @@
 
 define i32 @test1() nounwind {
 ; CHECK-LABEL: @test1(
-  %V1 = load float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 0), align 16
-  %V2 = load float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 1), align 4
-  %V3= load float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 2), align 8
-  %V4 = load float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 3), align 4
-; CHECK:   %V1 = load <4 x float>* bitcast ([1024 x float]* @A to <4 x float>*), align 16
+  %V1 = load float, float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 0), align 16
+  %V2 = load float, float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 1), align 4
+  %V3= load float, float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 2), align 8
+  %V4 = load float, float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 3), align 4
+; CHECK:   %V1 = load <4 x float>, <4 x float>* bitcast ([1024 x float]* @A to <4 x float>*), align 16
   store float %V1, float* getelementptr inbounds ([1024 x float]* @B, i64 0, i64 0), align 16
   store float %V2, float* getelementptr inbounds ([1024 x float]* @B, i64 0, i64 1), align 4
   store float %V3, float* getelementptr inbounds ([1024 x float]* @B, i64 0, i64 2), align 8