[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/LoopStrengthReduce/2012-03-26-constexpr.ll b/llvm/test/Transforms/LoopStrengthReduce/2012-03-26-constexpr.ll
index 1baf265..ce6161c 100644
--- a/llvm/test/Transforms/LoopStrengthReduce/2012-03-26-constexpr.ll
+++ b/llvm/test/Transforms/LoopStrengthReduce/2012-03-26-constexpr.ll
@@ -11,9 +11,9 @@
 define internal fastcc void @someFunction(%struct.this_structure_s.0.5* nocapture %scratch, i32 %stage, i32 %cbSize) nounwind {
 entry:
   %0 = getelementptr inbounds %struct.this_structure_s.0.5, %struct.this_structure_s.0.5* %scratch, i32 0, i32 4, i32 %stage
-  %1 = load i8** %0, align 4
+  %1 = load i8*, i8** %0, align 4
   %2 = getelementptr inbounds %struct.this_structure_s.0.5, %struct.this_structure_s.0.5* %scratch, i32 0, i32 5, i32 %stage
-  %3 = load i8** %2, align 4
+  %3 = load i8*, i8** %2, align 4
   %4 = getelementptr inbounds %struct.this_structure_s.0.5, %struct.this_structure_s.0.5* %scratch, i32 0, i32 2, i32 0, i32 0
   %tmp11 = shl i32 %stage, 1
   %tmp1325 = or i32 %tmp11, 1
@@ -31,9 +31,9 @@
   %scevgep10 = getelementptr i32, i32* %4, i32 %tmp928
   %scevgep12 = getelementptr %struct.this_structure_s.0.5, %struct.this_structure_s.0.5* %scratch, i32 0, i32 9, i32 %tmp11, i32 %i.12
   %scevgep14 = getelementptr %struct.this_structure_s.0.5, %struct.this_structure_s.0.5* %scratch, i32 0, i32 9, i32 %tmp1325, i32 %i.12
-  %5 = load i8* %scevgep12, align 1
+  %5 = load i8, i8* %scevgep12, align 1
   %6 = sext i8 %5 to i32
-  %7 = load i8* %scevgep14, align 1
+  %7 = load i8, i8* %scevgep14, align 1
   %8 = sext i8 %7 to i32
   store i32 0, i32* %lvar_g.13, align 4
   store i32 %8, i32* %scevgep, align 4