; RUN: opt < %s -loop-simplify -lcssa -verify-loop-info -verify-dom-info -S | FileCheck %s
; LCSSA should work correctly in the case of an indirectbr that exits
; the loop, and the loop has exits with predecessors not within the loop
; (and btw these edges are unsplittable due to the indirectbr).
; PR5437
define i32 @test0() nounwind {
; CHECK-LABEL: @test0
entry:
br i1 undef, label %"4", label %"3"
"3": ; preds = %entry
ret i32 0
"4": ; preds = %entry
br i1 undef, label %"6", label %"5"
"5": ; preds = %"4"
unreachable
"6": ; preds = %"4"
br i1 undef, label %"10", label %"13"
"10": ; preds = %"6"
br i1 undef, label %"22", label %"15"
"13": ; preds = %"6"
unreachable
"15": ; preds = %"23", %"10"
unreachable
"22": ; preds = %"10"
br label %"23"
"23": ; preds = %"1375", %"22"
%0 = phi i32 [ undef, %"22" ], [ %1, %"1375" ] ; <i32> [#uses=1]
indirectbr i8* undef, [label %"15", label %"24", label %"25", label %"26", label %"27", label %"28", label %"29", label %"30", label %"32", label %"32", label %"33", label %"167", label %"173", label %"173", label %"173", label %"173", label %"173", label %"192", label %"193", label %"194", label %"196", label %"206", label %"231", label %"241", label %"251", label %"261", label %"307", label %"353", label %"354", label %"355", label %"361", label %"367", label %"400", label %"433", label %"466", label %"499", label %"509", label %"519", label %"529", label %"571", label %"589", label %"607", label %"635", label %"655", label %"664", label %"671", label %"680", label %"687", label %"692", label %"698", label %"704", label %"715", label %"715", label %"716", label %"725", label %"725", label %"725", label %"725", label %"724", label %"724", label %"724", label %"724", label %"737", label %"737", label %"737", label %"737", label %"761", label %"758", label %"759", label %"760", label %"766", label %"763", label %"764", label %"765", label %"771", label %"768", label %"769", label %"770", label %"780", label %"777", label %"778", label %"779", label %"821", label %"826", label %"831", label %"832", label %"833", label %"836", label %"836", label %"886", label %"905", label %"978", label %"978", label %"1136", label %"1166", label %"1179", label %"1201", label %"1212", label %"1212", label %"1274", label %"1284", label %"1284", label %"1346", label %"1347", label %"1348", label %"1349", label %"1350", label %"1353", label %"1353", label %"1353", label %"1355", label %"1355", label %"1357", label %"1357", label %"1358", label %"1359", label %"1374", label %"1375", label %"1376", label %"1377", label %"1378", label %"1379", label %"1386", label %"1395", label %"1394", label %"1425", label %"1426", label %"1440", label %"1449", label %"1455", label %"1461", label %"1471", label %"1482", label %"1484", label %"1486", label %"1489", label %"1489", label %"1492", label %"1494", label %"1494", label %"1497", label %"1499", label %"1499", label %"1515", label %"1546", label %"1546", label %"1566", label %"1584", label %"1587", label %"1591", label %"1605", label %"1609", label %"1609", label %"1640", label %"1648", label %"1651", label %"1703", label %"1710", label %"1718", label %"1724", label %"1725", label %"1726", label %"1727", label %"1728", label %"1731", label %"1732", label %"1733", label %"1734", label %"1735", label %"1741", label %"1750", label %"1752", label %"1754", label %"1755", label %"1757", label %"1759", label %"1761", label %"1764", label %"1764", label %"1766", label %"1768", label %"1775", label %"1775", label %"1781", label %"1781", label %"1790", label %"1827", label %"1836", label %"1836", label %"1845", label %"1845", label %"1848", label %"1849", label %"1851", label %"1853", label %"1856", label %"1861", label %"1861"]
"24": ; preds = %"23"
unreachable
"25": ; preds = %"23"
unreachable
"26": ; preds = %"23"
unreachable
"27": ; preds = %"23"
unreachable
"28": ; preds = %"23"
unreachable
"29": ; preds = %"23"
unreachable
"30": ; preds = %"23"
unreachable
"32": ; preds = %"23", %"23"
unreachable
"33": ; preds = %"23"
unreachable
"167": ; preds = %"23"
unreachable
"173": ; preds = %"23", %"23", %"23", %"23", %"23"
unreachable
"192": ; preds = %"23"
unreachable
"193": ; preds = %"23"
unreachable
"194": ; preds = %"23"
unreachable
"196": ; preds = %"23"
unreachable
"206": ; preds = %"23"
unreachable
"231": ; preds = %"23"
unreachable
"241": ; preds = %"23"
unreachable
"251": ; preds = %"23"
unreachable
"261": ; preds = %"23"
unreachable
"307": ; preds = %"23"
unreachable
"353": ; preds = %"23"
unreachable
"354": ; preds = %"23"
unreachable
"355": ; preds = %"23"
unreachable
"361": ; preds = %"23"
unreachable
"367": ; preds = %"23"
unreachable
"400": ; preds = %"23"
unreachable
"433": ; preds = %"23"
unreachable
"466": ; preds = %"23"
unreachable
"499": ; preds = %"23"
unreachable
"509": ; preds = %"23"
unreachable
"519": ; preds = %"23"
unreachable
"529": ; preds = %"23"
unreachable
"571": ; preds = %"23"
unreachable
"589": ; preds = %"23"
unreachable
"607": ; preds = %"23"
unreachable
"635": ; preds = %"23"
unreachable
"655": ; preds = %"23"
unreachable
"664": ; preds = %"23"
unreachable
"671": ; preds = %"23"
unreachable
"680": ; preds = %"23"
unreachable
"687": ; preds = %"23"
unreachable
"692": ; preds = %"23"
br label %"1862"
"698": ; preds = %"23"
unreachable
"704": ; preds = %"23"
unreachable
"715": ; preds = %"23", %"23"
unreachable
"716": ; preds = %"23"
unreachable
"724": ; preds = %"23", %"23", %"23", %"23"
unreachable
"725": ; preds = %"23", %"23", %"23", %"23"
unreachable
"737": ; preds = %"23", %"23", %"23", %"23"
unreachable
"758": ; preds = %"23"
unreachable
"759": ; preds = %"23"
unreachable
"760": ; preds = %"23"
unreachable
"761": ; preds = %"23"
unreachable
"763": ; preds = %"23"
unreachable
"764": ; preds = %"23"
unreachable
"765": ; preds = %"23"
br label %"766"
"766": ; preds = %"765", %"23"
unreachable
"768": ; preds = %"23"
unreachable
"769": ; preds = %"23"
unreachable
"770": ; preds = %"23"
unreachable
"771": ; preds = %"23"
unreachable
"777": ; preds = %"23"
unreachable
"778": ; preds = %"23"
unreachable
"779": ; preds = %"23"
unreachable
"780": ; preds = %"23"
unreachable
"821": ; preds = %"23"
unreachable
"826": ; preds = %"23"
unreachable
"831": ; preds = %"23"
unreachable
"832": ; preds = %"23"
unreachable
"833": ; preds = %"23"
unreachable
"836": ; preds = %"23", %"23"
unreachable
"886": ; preds = %"23"
unreachable
"905": ; preds = %"23"
unreachable
"978": ; preds = %"23", %"23"
unreachable
"1136": ; preds = %"23"
unreachable
"1166": ; preds = %"23"
unreachable
"1179": ; preds = %"23"
unreachable
"1201": ; preds = %"23"
unreachable
"1212": ; preds = %"23", %"23"
unreachable
"1274": ; preds = %"23"
unreachable
"1284": ; preds = %"23", %"23"
unreachable
"1346": ; preds = %"23"
unreachable
"1347": ; preds = %"23"
unreachable
"1348": ; preds = %"23"
unreachable
"1349": ; preds = %"23"
unreachable
"1350": ; preds = %"23"
unreachable
"1353": ; preds = %"23", %"23", %"23"
unreachable
"1355": ; preds = %"23", %"23"
unreachable
"1357": ; preds = %"23", %"23"
unreachable
"1358": ; preds = %"23"
unreachable
"1359": ; preds = %"23"
unreachable
"1374": ; preds = %"23"
unreachable
"1375": ; preds = %"23"
%1 = zext i8 undef to i32 ; <i32> [#uses=1]
br label %"23"
"1376": ; preds = %"23"
unreachable
"1377": ; preds = %"23"
unreachable
"1378": ; preds = %"23"
unreachable
"1379": ; preds = %"23"
unreachable
"1386": ; preds = %"23"
unreachable
"1394": ; preds = %"23"
unreachable
"1395": ; preds = %"23"
unreachable
"1425": ; preds = %"23"
unreachable
"1426": ; preds = %"23"
unreachable
"1440": ; preds = %"23"
unreachable
"1449": ; preds = %"23"
unreachable
"1455": ; preds = %"23"
unreachable
"1461": ; preds = %"23"
unreachable
"1471": ; preds = %"23"
unreachable
"1482": ; preds = %"23"
unreachable
"1484": ; preds = %"23"
unreachable
"1486": ; preds = %"23"
unreachable
"1489": ; preds = %"23", %"23"
unreachable
"1492": ; preds = %"23"
unreachable
"1494": ; preds = %"23", %"23"
unreachable
"1497": ; preds = %"23"
unreachable
"1499": ; preds = %"23", %"23"
unreachable
"1515": ; preds = %"23"
unreachable
"1546": ; preds = %"23", %"23"
unreachable
"1566": ; preds = %"23"
br i1 undef, label %"1569", label %"1568"
"1568": ; preds = %"1566"
unreachable
"1569": ; preds = %"1566"
unreachable
"1584": ; preds = %"23"
unreachable
"1587": ; preds = %"23"
unreachable
"1591": ; preds = %"23"
unreachable
"1605": ; preds = %"23"
unreachable
"1609": ; preds = %"23", %"23"
unreachable
"1640": ; preds = %"23"
unreachable
"1648": ; preds = %"23"
unreachable
"1651": ; preds = %"23"
unreachable
"1703": ; preds = %"23"
unreachable
"1710": ; preds = %"23"
unreachable
"1718": ; preds = %"23"
unreachable
"1724": ; preds = %"23"
unreachable
"1725": ; preds = %"23"
unreachable
"1726": ; preds = %"23"
unreachable
"1727": ; preds = %"23"
unreachable
"1728": ; preds = %"23"
unreachable
"1731": ; preds = %"23"
unreachable
"1732": ; preds = %"23"
unreachable
"1733": ; preds = %"23"
unreachable
"1734": ; preds = %"23"
unreachable
"1735": ; preds = %"23"
unreachable
"1741": ; preds = %"23"
unreachable
"1750": ; preds = %"23"
unreachable
"1752": ; preds = %"23"
unreachable
"1754": ; preds = %"23"
unreachable
"1755": ; preds = %"23"
unreachable
"1757": ; preds = %"23"
unreachable
"1759": ; preds = %"23"
unreachable
"1761": ; preds = %"23"
unreachable
"1764": ; preds = %"23", %"23"
%2 = icmp eq i32 %0, 168 ; <i1> [#uses=0]
unreachable
"1766": ; preds = %"23"
unreachable
"1768": ; preds = %"23"
unreachable
"1775": ; preds = %"23", %"23"
unreachable
"1781": ; preds = %"23", %"23"
unreachable
"1790": ; preds = %"23"
unreachable
"1827": ; preds = %"23"
unreachable
"1836": ; preds = %"23", %"23"
br label %"1862"
"1845": ; preds = %"23", %"23"
unreachable
"1848": ; preds = %"23"
unreachable
"1849": ; preds = %"23"
unreachable
"1851": ; preds = %"23"
unreachable
"1853": ; preds = %"23"
unreachable
"1856": ; preds = %"23"
unreachable
"1861": ; preds = %"23", %"23"
unreachable
"41": ; preds = %"23", %"23"
unreachable
"1862": ; preds = %"1836", %"692"
unreachable
}
; An exit for Loop L1 may be the header of a disjoint Loop L2. Thus, when we
; create PHIs in one of such exits we are also inserting PHIs in L2 header. This
; could break LCSSA form for L2 because these inserted PHIs can also have uses
; in L2 exits. Test that we don't assert/crash on that.
define void @test1() {
; CHECK-LABEL: @test1
br label %lab1
lab1:
%tmp21 = add i32 undef, 677038203
br i1 undef, label %lab2, label %exit
lab2:
indirectbr i8* undef, [label %lab1, label %lab3]
lab3:
; CHECK: %tmp21.lcssa1 = phi i32 [ %tmp21.lcssa1, %lab4 ], [ %tmp21, %lab2 ]
%tmp12 = phi i32 [ %tmp21, %lab2 ], [ %tmp12, %lab4 ]
br i1 undef, label %lab5, label %lab4
lab4:
br label %lab3
lab5:
; CHECK: %tmp21.lcssa1.lcssa = phi i32 [ %tmp21.lcssa1, %lab3 ]
%tmp15 = add i32 %tmp12, undef
br label %exit
exit:
ret void
}