forked from OSchip/llvm-project
109 lines
3.6 KiB
LLVM
109 lines
3.6 KiB
LLVM
; RUN: opt < %s -S -loop-flatten -verify-loop-info -verify-dom-info -verify-scev -verify | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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; Test case and IR corresponding to this code:
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;
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; int k = 0;
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; for(int i = 0; i < n; i++)
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; for(int j = 0; j < n; j++) {
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; A[k] = B[k];
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; k++;
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; }
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;
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; TODO: this case doesn't trigger yet.
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;
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define dso_local void @v0(i32 %n, i32* nocapture %A, i32* nocapture readonly %B) local_unnamed_addr #0 {
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;
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; CHECK-LABEL: @v0
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; CHECK-NOT: %flatten.tripcount = mul i32 %n, %n
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;
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entry:
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%cmp21 = icmp sgt i32 %n, 0
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br i1 %cmp21, label %for.cond1.preheader.us.preheader, label %for.cond.cleanup
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for.cond1.preheader.us.preheader:
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br label %for.cond1.preheader.us
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for.cond1.preheader.us:
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%i.023.us = phi i32 [ %inc8.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
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%k.022.us = phi i32 [ %inc.us.lcssa, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
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%0 = add i32 %n, %k.022.us
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br label %for.body4.us
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for.body4.us:
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%k.119.us = phi i32 [ %k.022.us, %for.cond1.preheader.us ], [ %inc.us, %for.body4.us ]
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%arrayidx.us = getelementptr inbounds i32, i32* %B, i32 %k.119.us
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%1 = load i32, i32* %arrayidx.us, align 4
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%arrayidx5.us = getelementptr inbounds i32, i32* %A, i32 %k.119.us
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store i32 %1, i32* %arrayidx5.us, align 4
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%inc.us = add i32 %k.119.us, 1
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%exitcond = icmp ne i32 %inc.us, %0
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br i1 %exitcond, label %for.body4.us, label %for.cond1.for.cond.cleanup3_crit_edge.us
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for.cond1.for.cond.cleanup3_crit_edge.us:
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%inc.us.lcssa = phi i32 [ %inc.us, %for.body4.us ]
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%inc8.us = add nuw nsw i32 %i.023.us, 1
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%cmp.us = icmp slt i32 %inc8.us, %n
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br i1 %cmp.us, label %for.cond1.preheader.us, label %for.cond.cleanup.loopexit
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for.cond.cleanup.loopexit:
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br label %for.cond.cleanup
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for.cond.cleanup:
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ret void
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}
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; Test case and IR corresponding to this code:
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;
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; for(int i = 0; i < n; i++)
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; for(int j = 0; j < n; j++) {
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; int k = i*n+j;
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; A[k] = B[k];
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; k++;
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; }
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;
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define dso_local void @v1(i32 %n, i32* nocapture %A, i32* nocapture readonly %B) local_unnamed_addr #0 {
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;
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; CHECK-LABEL: @v1
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; CHECK: for.cond1.preheader.us.preheader:
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; CHECK: %flatten.tripcount = mul i32 %n, %n
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; CHECK: for.cond1.for.cond.cleanup3_crit_edge.us:
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; CHECK: %inc8.us = add nuw nsw i32 %i.024.us, 1
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; CHECK: %cmp.us = icmp slt i32 %inc8.us, %flatten.tripcount
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;
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entry:
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%cmp23 = icmp sgt i32 %n, 0
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br i1 %cmp23, label %for.cond1.preheader.us.preheader, label %for.cond.cleanup
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for.cond1.preheader.us.preheader:
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br label %for.cond1.preheader.us
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for.cond1.preheader.us:
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%i.024.us = phi i32 [ %inc8.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
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%mul.us = mul nsw i32 %i.024.us, %n
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br label %for.body4.us
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for.body4.us:
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%j.022.us = phi i32 [ 0, %for.cond1.preheader.us ], [ %inc6.us, %for.body4.us ]
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%add.us = add nsw i32 %j.022.us, %mul.us
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%arrayidx.us = getelementptr inbounds i32, i32* %B, i32 %add.us
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%0 = load i32, i32* %arrayidx.us, align 4
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%arrayidx5.us = getelementptr inbounds i32, i32* %A, i32 %add.us
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store i32 %0, i32* %arrayidx5.us, align 4
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%inc6.us = add nuw nsw i32 %j.022.us, 1
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%exitcond = icmp ne i32 %inc6.us, %n
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br i1 %exitcond, label %for.body4.us, label %for.cond1.for.cond.cleanup3_crit_edge.us
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for.cond1.for.cond.cleanup3_crit_edge.us:
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%inc8.us = add nuw nsw i32 %i.024.us, 1
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%cmp.us = icmp slt i32 %inc8.us, %n
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br i1 %cmp.us, label %for.cond1.preheader.us, label %for.cond.cleanup.loopexit
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for.cond.cleanup.loopexit:
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br label %for.cond.cleanup
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for.cond.cleanup:
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ret void
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}
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