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46bdfb0e6b
to more accurately describe what it does. Expand its doxygen comment to describe what the backedge-taken count is and how it differs from the actual iteration count of the loop. Adjust names and comments in associated code accordingly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65382 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
623 B
LLVM
23 lines
623 B
LLVM
; RUN: llvm-as < %s | opt -analyze -scalar-evolution \
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; RUN: -scalar-evolution-max-iterations=0 | grep {backedge-taken count is 13}
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; PR1706
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define i32 @f() {
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entry:
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br label %bb5
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bb: ; preds = %bb5
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%tmp2 = shl i32 %j.0, 1 ; <i32> [#uses=1]
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%tmp4 = add i32 %i.0, 268435456 ; <i32> [#uses=1]
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br label %bb5
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bb5: ; preds = %bb, %entry
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%j.0 = phi i32 [ 1, %entry ], [ %tmp2, %bb ] ; <i32> [#uses=2]
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%i.0 = phi i32 [ -1879048192, %entry ], [ %tmp4, %bb ] ; <i32> [#uses=2]
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%tmp7 = icmp slt i32 %i.0, 1610612736 ; <i1> [#uses=1]
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br i1 %tmp7, label %bb, label %return
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return: ; preds = %bb5
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ret i32 %j.0
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}
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