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46 lines
1.9 KiB
LLVM
46 lines
1.9 KiB
LLVM
; RUN: opt < %s -O1 -S -loop-versioning-licm -debug-only=loop-versioning-licm 2>&1 | FileCheck %s
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; REQUIRES: asserts
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;
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; Test to confirm loop is not a candidate for LoopVersioningLICM.
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;
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; CHECK: Loop: Loop at depth 2 containing: %for.body3<header><latch><exiting>
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; CHECK-NEXT: LAA: Runtime check not found !!
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; CHECK-NEXT: Loop instructions not suitable for LoopVersioningLICM
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define i32 @foo(i32* nocapture %var1, i32 %itr) #0 {
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entry:
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%cmp18 = icmp eq i32 %itr, 0
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br i1 %cmp18, label %for.end8, label %for.cond1.preheader
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for.cond1.preheader: ; preds = %entry, %for.inc6
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%j.020 = phi i32 [ %j.1.lcssa, %for.inc6 ], [ 0, %entry ]
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%i.019 = phi i32 [ %inc7, %for.inc6 ], [ 0, %entry ]
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%cmp216 = icmp ult i32 %j.020, %itr
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br i1 %cmp216, label %for.body3.lr.ph, label %for.inc6
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for.body3.lr.ph: ; preds = %for.cond1.preheader
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%0 = zext i32 %j.020 to i64
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br label %for.body3
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for.body3: ; preds = %for.body3, %for.body3.lr.ph
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%indvars.iv = phi i64 [ %0, %for.body3.lr.ph ], [ %indvars.iv.next, %for.body3 ]
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%arrayidx = getelementptr inbounds i32, i32* %var1, i64 %indvars.iv
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%1 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %1, %itr
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store i32 %add, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %itr
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br i1 %exitcond, label %for.inc6, label %for.body3
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for.inc6: ; preds = %for.body3, %for.cond1.preheader
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%j.1.lcssa = phi i32 [ %j.020, %for.cond1.preheader ], [ %itr, %for.body3 ]
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%inc7 = add nuw i32 %i.019, 1
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%exitcond21 = icmp eq i32 %inc7, %itr
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br i1 %exitcond21, label %for.end8, label %for.cond1.preheader
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for.end8: ; preds = %for.inc6, %entry
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ret i32 0
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}
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