Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/LoopInterchange/currentLimitation.ll

@@ -1,58 +0,0 @@
-; RUN: opt < %s -basicaa -loop-interchange -S | FileCheck %s
-;; These are test that fail to interchange due to current limitation. This will go off once we extend the loop interchange pass.
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
- 
-@A = common global [100 x [100 x i32]] zeroinitializer
-@B = common global [100 x [100 x [100 x i32]]] zeroinitializer
- 
-;;--------------------------------------Test case 01------------------------------------
-;; [FIXME] This loop though valid is currently not interchanged due to the limitation that we cannot split the inner loop latch due to multiple use of inner induction
-;; variable.(used to increment the loop counter and to access A[j+1][i+1]
-;;  for(int i=0;i<N-1;i++)
-;;    for(int j=1;j<N-1;j++)
-;;      A[j+1][i+1] = A[j+1][i+1] + k;
-
-define void @interchange_01(i32 %k, i32 %N) {
- entry:
-   %sub = add nsw i32 %N, -1
-   %cmp26 = icmp sgt i32 %N, 1
-   br i1 %cmp26, label %for.cond1.preheader.lr.ph, label %for.end17
- 
- for.cond1.preheader.lr.ph:
-   %cmp324 = icmp sgt i32 %sub, 1
-   %0 = add i32 %N, -2
-   %1 = sext i32 %sub to i64
-   br label %for.cond1.preheader
- 
- for.cond.loopexit:
-   %cmp = icmp slt i64 %indvars.iv.next29, %1
-   br i1 %cmp, label %for.cond1.preheader, label %for.end17
- 
- for.cond1.preheader:
-   %indvars.iv28 = phi i64 [ 0, %for.cond1.preheader.lr.ph ], [ %indvars.iv.next29, %for.cond.loopexit ]
-   %indvars.iv.next29 = add nuw nsw i64 %indvars.iv28, 1
-   br i1 %cmp324, label %for.body4, label %for.cond.loopexit
- 
- for.body4:
-   %indvars.iv = phi i64 [ %indvars.iv.next, %for.body4 ], [ 1, %for.cond1.preheader ]
-   %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
-   %arrayidx7 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv.next, i64 %indvars.iv.next29
-   %2 = load i32, i32* %arrayidx7
-   %add8 = add nsw i32 %2, %k
-   store i32 %add8, i32* %arrayidx7
-   %lftr.wideiv = trunc i64 %indvars.iv to i32
-   %exitcond = icmp eq i32 %lftr.wideiv, %0
-   br i1 %exitcond, label %for.cond.loopexit, label %for.body4
- 
- for.end17: 
-   ret void
-}
-;; Inner loop not split so it is not interchanged.
-; CHECK-LABEL: @interchange_01
-; CHECK:      for.body4:
-; CHECK-NEXT:   %indvars.iv = phi i64 [ %indvars.iv.next, %for.body4 ], [ 1, %for.body4.preheader ]
-; CHECK-NEXT:   %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
-; CHECK-NEXT:   %arrayidx7 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv.next, i64 %indvars.iv.next29
-