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- ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
- ; PR4599
- target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
- ; CHECK: Loop %for.body: backedge-taken count is (-1 + {{%?}}ecx)
- define i32 @foo(i32 %ecx) nounwind {
- entry:
- %cmp2 = icmp eq i32 %ecx, 0 ; <i1> [#uses=1]
- br i1 %cmp2, label %for.end, label %bb.nph
- for.cond: ; preds = %for.inc
- %cmp = icmp ult i32 %inc, %ecx ; <i1> [#uses=1]
- br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
- for.cond.for.end_crit_edge: ; preds = %for.cond
- %phitmp = add i32 %i.01, 2 ; <i32> [#uses=1]
- br label %for.end
- bb.nph: ; preds = %entry
- br label %for.body
- for.body: ; preds = %bb.nph, %for.cond
- %i.01 = phi i32 [ %inc, %for.cond ], [ 0, %bb.nph ] ; <i32> [#uses=3]
- %call = call i32 @bar(i32 %i.01) nounwind ; <i32> [#uses=0]
- br label %for.inc
- for.inc: ; preds = %for.body
- %inc = add i32 %i.01, 1 ; <i32> [#uses=2]
- br label %for.cond
- for.end: ; preds = %for.cond.for.end_crit_edge, %entry
- %i.0.lcssa = phi i32 [ %phitmp, %for.cond.for.end_crit_edge ], [ 1, %entry ] ; <i32> [#uses=1]
- ret i32 %i.0.lcssa
- }
- declare i32 @bar(i32)
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