| Jakob Stoklund Olesen | e3b5482 | 2012-05-23 20:21:06 +0000 | [diff] [blame^] | 1 | ; RUN: llc < %s -verify-coalescing |
| 2 | ; PR12927 |
| 3 | target triple = "x86_64-apple-macosx10.8.0" |
| 4 | |
| 5 | ; This is a case where removeCopyByCommutingDef() creates an identity copy that |
| 6 | ; joinCopy must then deal with correctly. |
| 7 | |
| 8 | @s = common global i16 0, align 2 |
| 9 | @g1 = common global i32 0, align 4 |
| 10 | @g2 = common global i32 0, align 4 |
| 11 | @g0 = common global i32 0, align 4 |
| 12 | |
| 13 | define void @func() nounwind uwtable ssp { |
| 14 | for.body.lr.ph: |
| 15 | %0 = load i32* @g2, align 4, !tbaa !0 |
| 16 | %tobool6 = icmp eq i32 %0, 0 |
| 17 | %s.promoted = load i16* @s, align 2 |
| 18 | %.pre = load i32* @g1, align 4, !tbaa !0 |
| 19 | br i1 %tobool6, label %for.body.us, label %for.body |
| 20 | |
| 21 | for.body.us: ; preds = %for.body.lr.ph, %for.inc.us |
| 22 | %1 = phi i32 [ %3, %for.inc.us ], [ %.pre, %for.body.lr.ph ] |
| 23 | %dec13.us = phi i16 [ %dec12.us, %for.inc.us ], [ %s.promoted, %for.body.lr.ph ] |
| 24 | %i.011.us = phi i32 [ %inc.us, %for.inc.us ], [ undef, %for.body.lr.ph ] |
| 25 | %v.010.us = phi i32 [ %phitmp.us, %for.inc.us ], [ 1, %for.body.lr.ph ] |
| 26 | %tobool1.us = icmp ne i32 %v.010.us, 0 |
| 27 | %2 = zext i1 %tobool1.us to i16 |
| 28 | %lnot.ext.us = xor i16 %2, 1 |
| 29 | %add.us = add i16 %dec13.us, %lnot.ext.us |
| 30 | %conv3.us = zext i16 %add.us to i32 |
| 31 | %add4.us = sub i32 0, %1 |
| 32 | %tobool5.us = icmp eq i32 %conv3.us, %add4.us |
| 33 | br i1 %tobool5.us, label %for.inc.us, label %if.then7.us |
| 34 | |
| 35 | for.inc.us: ; preds = %cond.end.us, %for.body.us |
| 36 | %3 = phi i32 [ %1, %for.body.us ], [ %4, %cond.end.us ] |
| 37 | %dec12.us = phi i16 [ %add.us, %for.body.us ], [ %dec.us, %cond.end.us ] |
| 38 | %inc.us = add i32 %i.011.us, 1 |
| 39 | %phitmp.us = udiv i32 %v.010.us, 12 |
| 40 | %tobool.us = icmp eq i32 %inc.us, 0 |
| 41 | br i1 %tobool.us, label %for.end, label %for.body.us |
| 42 | |
| 43 | cond.end.us: ; preds = %if.then7.us, %cond.false.us |
| 44 | %4 = phi i32 [ 0, %cond.false.us ], [ %1, %if.then7.us ] |
| 45 | %cond.us = phi i32 [ 0, %cond.false.us ], [ %v.010.us, %if.then7.us ] |
| 46 | store i32 %cond.us, i32* @g0, align 4, !tbaa !0 |
| 47 | br label %for.inc.us |
| 48 | |
| 49 | cond.false.us: ; preds = %if.then7.us |
| 50 | store i32 0, i32* @g1, align 4, !tbaa !0 |
| 51 | br label %cond.end.us |
| 52 | |
| 53 | if.then7.us: ; preds = %for.body.us |
| 54 | %dec.us = add i16 %add.us, -1 |
| 55 | br i1 %tobool1.us, label %cond.end.us, label %cond.false.us |
| 56 | |
| 57 | for.body: ; preds = %for.body.lr.ph, %for.body |
| 58 | %dec13 = phi i16 [ %dec12, %for.body ], [ %s.promoted, %for.body.lr.ph ] |
| 59 | %i.011 = phi i32 [ %inc, %for.body ], [ undef, %for.body.lr.ph ] |
| 60 | %v.010 = phi i32 [ %phitmp, %for.body ], [ 1, %for.body.lr.ph ] |
| 61 | %tobool1 = icmp eq i32 %v.010, 0 |
| 62 | %lnot.ext = zext i1 %tobool1 to i16 |
| 63 | %add = add i16 %dec13, %lnot.ext |
| 64 | %conv3 = zext i16 %add to i32 |
| 65 | %add4 = sub i32 0, %.pre |
| 66 | %not.tobool5 = icmp ne i32 %conv3, %add4 |
| 67 | %dec = sext i1 %not.tobool5 to i16 |
| 68 | %dec12 = add i16 %add, %dec |
| 69 | %inc = add i32 %i.011, 1 |
| 70 | %phitmp = udiv i32 %v.010, 12 |
| 71 | %tobool = icmp eq i32 %inc, 0 |
| 72 | br i1 %tobool, label %for.end, label %for.body |
| 73 | |
| 74 | for.end: ; preds = %for.inc.us, %for.body |
| 75 | %dec12.lcssa = phi i16 [ %dec12.us, %for.inc.us ], [ %dec12, %for.body ] |
| 76 | store i16 %dec12.lcssa, i16* @s, align 2 |
| 77 | ret void |
| 78 | } |
| 79 | |
| 80 | !0 = metadata !{metadata !"int", metadata !1} |
| 81 | !1 = metadata !{metadata !"omnipotent char", metadata !2} |
| 82 | !2 = metadata !{metadata !"Simple C/C++ TBAA"} |