llvm-6502/test/Transforms/SCCP/2002-05-21-InvalidSimplify.ll
Chris Lattner 53eaf1e431 New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2705 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-21 22:23:38 +00:00

40 lines
1.2 KiB
LLVM

; 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: as < %s | opt -sccp -simplifycfg | dis | grep ret
void "old_main"() {
bb3: ;[#uses=1]
br label %bb6
bb6: ;[#uses=3]
%reg403 = phi int [ %reg155, %bb14 ], [ 0, %bb3 ] ; <int> [#uses=2]
%reg155 = add int %reg403, 1 ; <int> [#uses=3]
br label %bb11
bb11:
%reg407 = phi int [ %reg408, %bb11 ], [ 0, %bb6 ] ; <int> [#uses=2]
%reg408 = add int %reg407, 1 ; <int> [#uses=2]
%cond550 = setle int %reg407, 1 ; <bool> [#uses=1]
br bool %cond550, label %bb11, label %bb12
bb12: ;[#uses=2]
br label %bb13
bb13: ;[#uses=3]
%reg409 = phi int [ %reg410, %bb13 ], [ 0, %bb12 ] ; <int> [#uses=1]
%reg410 = add int %reg409, 1 ; <int> [#uses=2]
%cond552 = setle int %reg410, 2 ; <bool> [#uses=1]
br bool %cond552, label %bb13, label %bb14
bb14: ;[#uses=2]
%cond553 = setle int %reg155, 31 ; <bool> [#uses=1]
br bool %cond553, label %bb6, label %bb15
bb15: ;[#uses=1]
ret void
}