Revert LoopStrengthReduce.cpp to pre-r94061 for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94123 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/LoopStrengthReduce/2008-08-06-CmpStride.ll

@@ -1,4 +1,5 @@
-; RUN: llc -march=x86-64 < %s -o - | grep {cmpl	\\$\[1\], %}
+; RUN: opt < %s -loop-reduce -S | grep ugt
+; PR2535
 
 @.str = internal constant [4 x i8] c"%d\0A\00"
 
@@ -15,7 +16,7 @@ forbody:
         %add166 = or i32 %mul15, 1              ; <i32> [#uses=1] *
         call i32 (i8*, ...)* @printf( i8* noalias  getelementptr ([4 x i8]* @.str, i32 0, i32 0), i32 %add166 ) nounwind
         %inc = add i32 %i.0, 1          ; <i32> [#uses=3]
-        %cmp = icmp ne i32 %inc, 1027          ; <i1> [#uses=1]
+        %cmp = icmp ult i32 %inc, 1027          ; <i1> [#uses=1]
         br i1 %cmp, label %forbody, label %afterfor
 
 afterfor:               ; preds = %forcond

test/Transforms/LoopStrengthReduce/change-compare-stride-trickiness-0.ll

@@ -1,9 +1,10 @@
-; RUN: llc < %s -o - | grep {testl	%ecx, %ecx}
+; RUN: llc %s -o - --x86-asm-syntax=att | grep {cmpl	\$4}
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
 target triple = "x86_64-apple-darwin9"
 
-; The comparison happens before the relevant use, but it can still be rewritten
-; to compare with zero.
+; This is like change-compare-stride-trickiness-1.ll except the comparison
+; happens before the relevant use, so the comparison stride can't be
+; easily changed.
 
 define void @foo() nounwind {
 entry:

test/Transforms/LoopStrengthReduce/count-to-zero.ll

@@ -19,7 +19,7 @@ bb3:                                              ; preds = %bb1
   %tmp4 = add i32 %c_addr.1, -1                   ; <i32> [#uses=1]
   %c_addr.1.be = select i1 %tmp2, i32 %tmp3, i32 %tmp4 ; <i32> [#uses=1]
   %indvar.next = add i32 %indvar, 1               ; <i32> [#uses=1]
-; CHECK: add i32 %lsr.iv, -1
+; CHECK: sub i32 %lsr.iv, 1
   br label %bb6
 
 bb6:                                              ; preds = %bb3, %entry