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- ; This test shows SCCP "proving" that the loop (from bb6 to 14) loops infinitely
- ; this is in fact NOT the case, so the return should still be alive in the code
- ; after sccp and CFG simplification have been performed.
- ;
- ; RUN: opt < %s -sccp -simplifycfg -S | \
- ; RUN: grep ret
- define void @old_main() {
- bb3:
- br label %bb6
- bb6: ; preds = %bb14, %bb3
- %reg403 = phi i32 [ %reg155, %bb14 ], [ 0, %bb3 ] ; <i32> [#uses=1]
- %reg155 = add i32 %reg403, 1 ; <i32> [#uses=2]
- br label %bb11
- bb11: ; preds = %bb11, %bb6
- %reg407 = phi i32 [ %reg408, %bb11 ], [ 0, %bb6 ] ; <i32> [#uses=2]
- %reg408 = add i32 %reg407, 1 ; <i32> [#uses=1]
- %cond550 = icmp sle i32 %reg407, 1 ; <i1> [#uses=1]
- br i1 %cond550, label %bb11, label %bb12
- bb12: ; preds = %bb11
- br label %bb13
- bb13: ; preds = %bb13, %bb12
- %reg409 = phi i32 [ %reg410, %bb13 ], [ 0, %bb12 ] ; <i32> [#uses=1]
- %reg410 = add i32 %reg409, 1 ; <i32> [#uses=2]
- %cond552 = icmp sle i32 %reg410, 2 ; <i1> [#uses=1]
- br i1 %cond552, label %bb13, label %bb14
- bb14: ; preds = %bb13
- %cond553 = icmp sle i32 %reg155, 31 ; <i1> [#uses=1]
- br i1 %cond553, label %bb6, label %bb15
- bb15: ; preds = %bb14
- ret void
- }
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