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29 lines
774 B
LLVM
29 lines
774 B
LLVM
; RUN: opt < %s -analyze -scalar-evolution \
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; RUN: -scalar-evolution-max-iterations=0 | FileCheck %s
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; PR2607
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define i32 @_Z1aj(i32 %j) nounwind {
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entry:
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icmp sgt i32 0, %j ; <i1>:0 [#uses=1]
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br i1 %0, label %bb.preheader, label %return
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bb.preheader: ; preds = %entry
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br label %bb
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bb: ; preds = %bb, %bb.preheader
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%i.01 = phi i32 [ %1, %bb ], [ 0, %bb.preheader ] ; <i32> [#uses=1]
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add i32 %i.01, -1 ; <i32>:1 [#uses=3]
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icmp sgt i32 %1, %j ; <i1>:2 [#uses=1]
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br i1 %2, label %bb, label %return.loopexit
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return.loopexit: ; preds = %bb
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br label %return
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return: ; preds = %return.loopexit, %entry
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%i.0.lcssa = phi i32 [ 0, %entry ], [ %1, %return.loopexit ] ; <i32> [#uses=1]
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ret i32 %i.0.lcssa
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}
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; CHECK: backedge-taken count is (-1 + (-1 * %j))
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