diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/Analysis/ScalarEvolution/trip-count8.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/trip-count8.ll b/test/Analysis/ScalarEvolution/trip-count8.ll new file mode 100644 index 0000000..21ccc47 --- /dev/null +++ b/test/Analysis/ScalarEvolution/trip-count8.ll @@ -0,0 +1,37 @@ +; RUN: llvm-as < %s | opt -analyze -scalar-evolution -disable-output \ +; RUN: | grep {Loop for\\.body: backedge-taken count is (-1 + \[%\]ecx)} +; 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" + +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) |