[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/SampleProfile/discriminator.ll b/llvm/test/Transforms/SampleProfile/discriminator.ll
index cafc69d..704a407 100644
--- a/llvm/test/Transforms/SampleProfile/discriminator.ll
+++ b/llvm/test/Transforms/SampleProfile/discriminator.ll
@@ -31,33 +31,33 @@
   br label %while.cond, !dbg !11
 
 while.cond:                                       ; preds = %if.end, %entry
-  %0 = load i32* %i.addr, align 4, !dbg !12
+  %0 = load i32, i32* %i.addr, align 4, !dbg !12
   %cmp = icmp slt i32 %0, 100, !dbg !12
   br i1 %cmp, label %while.body, label %while.end, !dbg !12
 ; CHECK: edge while.cond -> while.body probability is 100 / 101 = 99.0099% [HOT edge]
 ; CHECK: edge while.cond -> while.end probability is 1 / 101 = 0.990099%
 
 while.body:                                       ; preds = %while.cond
-  %1 = load i32* %i.addr, align 4, !dbg !14
+  %1 = load i32, i32* %i.addr, align 4, !dbg !14
   %cmp1 = icmp slt i32 %1, 50, !dbg !14
   br i1 %cmp1, label %if.then, label %if.end, !dbg !14
 ; CHECK: edge while.body -> if.then probability is 5 / 100 = 5%
 ; CHECK: edge while.body -> if.end probability is 95 / 100 = 95% [HOT edge]
 
 if.then:                                          ; preds = %while.body
-  %2 = load i32* %x, align 4, !dbg !17
+  %2 = load i32, i32* %x, align 4, !dbg !17
   %dec = add nsw i32 %2, -1, !dbg !17
   store i32 %dec, i32* %x, align 4, !dbg !17
   br label %if.end, !dbg !17
 
 if.end:                                           ; preds = %if.then, %while.body
-  %3 = load i32* %i.addr, align 4, !dbg !19
+  %3 = load i32, i32* %i.addr, align 4, !dbg !19
   %inc = add nsw i32 %3, 1, !dbg !19
   store i32 %inc, i32* %i.addr, align 4, !dbg !19
   br label %while.cond, !dbg !20
 
 while.end:                                        ; preds = %while.cond
-  %4 = load i32* %x, align 4, !dbg !21
+  %4 = load i32, i32* %x, align 4, !dbg !21
   ret i32 %4, !dbg !21
 }