Revert "[LIR] Add support for creating memsets from loops with a negative stride."

This reverts commit r251512.  This is causing LNT/chomp to fail.

llvm-svn: 251513

1 files changed, 0 insertions, 44 deletions

diff --git a/llvm/test/Transforms/LoopIdiom/basic.ll b/llvm/test/Transforms/LoopIdiom/basic.ll
index f7317879a36..c633ae95d16 100644
--- a/llvm/test/Transforms/LoopIdiom/basic.ll
+++ b/llvm/test/Transforms/LoopIdiom/basic.ll
@@ -424,47 +424,3 @@ exit:
   ret void
 ; CHECK: ret void
 }
-
-; Recognize loops with a negative stride.
-define void @test15(i32* nocapture %f) {
-entry:
-  br label %for.body
-
-for.body:
-  %indvars.iv = phi i64 [ 65536, %entry ], [ %indvars.iv.next, %for.body ]
-  %arrayidx = getelementptr inbounds i32, i32* %f, i64 %indvars.iv
-  store i32 0, i32* %arrayidx, align 4
-  %indvars.iv.next = add nsw i64 %indvars.iv, -1
-  %cmp = icmp sgt i64 %indvars.iv, 0
-  br i1 %cmp, label %for.body, label %for.cond.cleanup
-
-for.cond.cleanup:
-  ret void
-; CHECK-LABEL: @test15(
-; CHECK: call void @llvm.memset.p0i8.i64(i8* %f1, i8 0, i64 262148, i32 4, i1 false)
-; CHECK-NOT: store
-; CHECK: ret void
-}
-
-; Loop with a negative stride.  Verify an aliasing write to f[65536] prevents
-; the creation of a memset.
-define void @test16(i32* nocapture %f) {
-entry:
-  %arrayidx1 = getelementptr inbounds i32, i32* %f, i64 65536
-  br label %for.body
-
-for.body:                                         ; preds = %entry, %for.body
-  %indvars.iv = phi i64 [ 65536, %entry ], [ %indvars.iv.next, %for.body ]
-  %arrayidx = getelementptr inbounds i32, i32* %f, i64 %indvars.iv
-  store i32 0, i32* %arrayidx, align 4
-  store i32 1, i32* %arrayidx1, align 4
-  %indvars.iv.next = add nsw i64 %indvars.iv, -1
-  %cmp = icmp sgt i64 %indvars.iv, 0
-  br i1 %cmp, label %for.body, label %for.cond.cleanup
-
-for.cond.cleanup:                                 ; preds = %for.body
-  ret void
-; CHECK-LABEL: @test16(
-; CHECK-NOT: call void @llvm.memset.p0i8.i64
-; CHECK: ret void
-}