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| ; RUN: llc -O1 < %s
; PR12138
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32-S128"
target triple = "i386-apple-macosx10.7.0"
%struct.S0 = type { i8, i32 }
@d = external global [2 x [2 x %struct.S0]], align 4
@c = external global i32, align 4
@e = external global i32, align 4
@b = external global i32, align 4
@a = external global i32, align 4
define void @fn2() nounwind optsize ssp {
entry:
store i64 0, i64* bitcast ([2 x [2 x %struct.S0]]* @d to i64*), align 4
%0 = load i32, i32* @c, align 4
%tobool2 = icmp eq i32 %0, 0
%1 = load i32, i32* @a, align 4
%tobool4 = icmp eq i32 %1, 0
br label %for.cond
for.cond: ; preds = %if.end, %entry
%f.1.0 = phi i32 [ undef, %entry ], [ %sub, %if.end ]
%g.0 = phi i64 [ 0, %entry ], [ %ins, %if.end ]
%tobool = icmp eq i32 %f.1.0, 0
br i1 %tobool, label %for.end, label %for.body
for.body: ; preds = %for.cond
%2 = lshr i64 %g.0, 32
%conv = trunc i64 %2 to i16
br i1 %tobool2, label %lor.rhs, label %lor.end
lor.rhs: ; preds = %for.body
store i32 1, i32* @e, align 4
br label %lor.end
lor.end: ; preds = %lor.rhs, %for.body
%xor.i = xor i16 %conv, 1
%p1.lobit.i8 = lshr i64 %g.0, 47
%p1.lobit.i8.tr = trunc i64 %p1.lobit.i8 to i16
%p1.lobit.i = and i16 %p1.lobit.i8.tr, 1
%and.i = and i16 %p1.lobit.i, %xor.i
%3 = xor i16 %and.i, 1
%sub.conv.i = sub i16 %conv, %3
%conv3 = sext i16 %sub.conv.i to i32
store i32 %conv3, i32* @b, align 4
br i1 %tobool4, label %if.end, label %for.end
if.end: ; preds = %lor.end
%mask = and i64 %g.0, -256
%ins = or i64 %mask, 1
%sub = add nsw i32 %f.1.0, -1
br label %for.cond
for.end: ; preds = %lor.end, %for.cond
ret void
}
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