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| author | Nick Lewycky <nicholas@mxc.ca> | 2011-10-03 07:10:45 +0000 |
|---|---|---|
| committer | Nick Lewycky <nicholas@mxc.ca> | 2011-10-03 07:10:45 +0000 |
| commit | 1cbae18cf60c023840aab605958eea635c837f16 (patch) | |
| tree | 67a37d875940fb03401c676b053ccfd557c257ad /test | |
| parent | 48488a64fadb2f99706029e51ae4c06fcfac5cdb (diff) | |
| download | llvm-1cbae18cf60c023840aab605958eea635c837f16.tar.gz llvm-1cbae18cf60c023840aab605958eea635c837f16.tar.bz2 llvm-1cbae18cf60c023840aab605958eea635c837f16.tar.xz | |
Reapply r140979 with fix! We never did get a testcase, but careful review of the
logic by David Meyer revealed this bug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140992 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Analysis/ScalarEvolution/max-trip-count.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/max-trip-count.ll b/test/Analysis/ScalarEvolution/max-trip-count.ll index 843fb07308..0cdbdf57a6 100644 --- a/test/Analysis/ScalarEvolution/max-trip-count.ll +++ b/test/Analysis/ScalarEvolution/max-trip-count.ll @@ -70,3 +70,31 @@ for.end: ; preds = %for.body, %for.cond } declare i32 @printf(i8*, ...) + +define void @test(i8* %a, i32 %n) nounwind { +entry: + %cmp1 = icmp sgt i32 %n, 0 + br i1 %cmp1, label %for.body.lr.ph, label %for.end + +for.body.lr.ph: ; preds = %entry + %tmp = zext i32 %n to i64 + br label %for.body + +for.body: ; preds = %for.body, %for.body.lr.ph + %indvar = phi i64 [ %indvar.next, %for.body ], [ 0, %for.body.lr.ph ] + %arrayidx = getelementptr i8* %a, i64 %indvar + store i8 0, i8* %arrayidx, align 1 + %indvar.next = add i64 %indvar, 1 + %exitcond = icmp ne i64 %indvar.next, %tmp + br i1 %exitcond, label %for.body, label %for.cond.for.end_crit_edge + +for.cond.for.end_crit_edge: ; preds = %for.body + br label %for.end + +for.end: ; preds = %for.cond.for.end_crit_edge, %entry + ret void +} + +; CHECK: Determining loop execution counts for: @test +; CHECK-NEXT: backedge-taken count is +; CHECK-NEXT: max backedge-taken count is -1 |