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; RUN: llc < %s -verify-coalescing
; PR12927
target triple = "x86_64-apple-macosx10.8.0"
; This is a case where removeCopyByCommutingDef() creates an identity copy that
; joinCopy must then deal with correctly.
@s = common global i16 0, align 2
@g1 = common global i32 0, align 4
@g2 = common global i32 0, align 4
@g0 = common global i32 0, align 4
define void @func() nounwind uwtable ssp {
for.body.lr.ph:
%0 = load i32, i32* @g2, align 4
%tobool6 = icmp eq i32 %0, 0
%s.promoted = load i16, i16* @s, align 2
%.pre = load i32, i32* @g1, align 4
br i1 %tobool6, label %for.body.us, label %for.body
for.body.us: ; preds = %for.body.lr.ph, %for.inc.us
%1 = phi i32 [ %3, %for.inc.us ], [ %.pre, %for.body.lr.ph ]
%dec13.us = phi i16 [ %dec12.us, %for.inc.us ], [ %s.promoted, %for.body.lr.ph ]
%i.011.us = phi i32 [ %inc.us, %for.inc.us ], [ undef, %for.body.lr.ph ]
%v.010.us = phi i32 [ %phitmp.us, %for.inc.us ], [ 1, %for.body.lr.ph ]
%tobool1.us = icmp ne i32 %v.010.us, 0
%2 = zext i1 %tobool1.us to i16
%lnot.ext.us = xor i16 %2, 1
%add.us = add i16 %dec13.us, %lnot.ext.us
%conv3.us = zext i16 %add.us to i32
%add4.us = sub i32 0, %1
%tobool5.us = icmp eq i32 %conv3.us, %add4.us
br i1 %tobool5.us, label %for.inc.us, label %if.then7.us
for.inc.us: ; preds = %cond.end.us, %for.body.us
%3 = phi i32 [ %1, %for.body.us ], [ %4, %cond.end.us ]
%dec12.us = phi i16 [ %add.us, %for.body.us ], [ %dec.us, %cond.end.us ]
%inc.us = add i32 %i.011.us, 1
%phitmp.us = udiv i32 %v.010.us, 12
%tobool.us = icmp eq i32 %inc.us, 0
br i1 %tobool.us, label %for.end, label %for.body.us
cond.end.us: ; preds = %if.then7.us, %cond.false.us
%4 = phi i32 [ 0, %cond.false.us ], [ %1, %if.then7.us ]
%cond.us = phi i32 [ 0, %cond.false.us ], [ %v.010.us, %if.then7.us ]
store i32 %cond.us, i32* @g0, align 4
br label %for.inc.us
cond.false.us: ; preds = %if.then7.us
store i32 0, i32* @g1, align 4
br label %cond.end.us
if.then7.us: ; preds = %for.body.us
%dec.us = add i16 %add.us, -1
br i1 %tobool1.us, label %cond.end.us, label %cond.false.us
for.body: ; preds = %for.body.lr.ph, %for.body
%dec13 = phi i16 [ %dec12, %for.body ], [ %s.promoted, %for.body.lr.ph ]
%i.011 = phi i32 [ %inc, %for.body ], [ undef, %for.body.lr.ph ]
%v.010 = phi i32 [ %phitmp, %for.body ], [ 1, %for.body.lr.ph ]
%tobool1 = icmp eq i32 %v.010, 0
%lnot.ext = zext i1 %tobool1 to i16
%add = add i16 %dec13, %lnot.ext
%conv3 = zext i16 %add to i32
%add4 = sub i32 0, %.pre
%not.tobool5 = icmp ne i32 %conv3, %add4
%dec = sext i1 %not.tobool5 to i16
%dec12 = add i16 %add, %dec
%inc = add i32 %i.011, 1
%phitmp = udiv i32 %v.010, 12
%tobool = icmp eq i32 %inc, 0
br i1 %tobool, label %for.end, label %for.body
for.end: ; preds = %for.inc.us, %for.body
%dec12.lcssa = phi i16 [ %dec12.us, %for.inc.us ], [ %dec12, %for.body ]
store i16 %dec12.lcssa, i16* @s, align 2
ret void
}
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