1; RUN: llc -O1 <%s 2; PR12138 3target 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" 4target triple = "i386-apple-macosx10.7.0" 5 6%struct.S0 = type { i8, i32 } 7 8@d = external global [2 x [2 x %struct.S0]], align 4 9@c = external global i32, align 4 10@e = external global i32, align 4 11@b = external global i32, align 4 12@a = external global i32, align 4 13 14define void @fn2() nounwind optsize ssp { 15entry: 16 store i64 0, i64* bitcast ([2 x [2 x %struct.S0]]* @d to i64*), align 4 17 %0 = load i32, i32* @c, align 4 18 %tobool2 = icmp eq i32 %0, 0 19 %1 = load i32, i32* @a, align 4 20 %tobool4 = icmp eq i32 %1, 0 21 br label %for.cond 22 23for.cond: ; preds = %if.end, %entry 24 %f.1.0 = phi i32 [ undef, %entry ], [ %sub, %if.end ] 25 %g.0 = phi i64 [ 0, %entry ], [ %ins, %if.end ] 26 %tobool = icmp eq i32 %f.1.0, 0 27 br i1 %tobool, label %for.end, label %for.body 28 29for.body: ; preds = %for.cond 30 %2 = lshr i64 %g.0, 32 31 %conv = trunc i64 %2 to i16 32 br i1 %tobool2, label %lor.rhs, label %lor.end 33 34lor.rhs: ; preds = %for.body 35 store i32 1, i32* @e, align 4 36 br label %lor.end 37 38lor.end: ; preds = %lor.rhs, %for.body 39 %xor.i = xor i16 %conv, 1 40 %p1.lobit.i8 = lshr i64 %g.0, 47 41 %p1.lobit.i8.tr = trunc i64 %p1.lobit.i8 to i16 42 %p1.lobit.i = and i16 %p1.lobit.i8.tr, 1 43 %and.i = and i16 %p1.lobit.i, %xor.i 44 %3 = xor i16 %and.i, 1 45 %sub.conv.i = sub i16 %conv, %3 46 %conv3 = sext i16 %sub.conv.i to i32 47 store i32 %conv3, i32* @b, align 4 48 br i1 %tobool4, label %if.end, label %for.end 49 50if.end: ; preds = %lor.end 51 %mask = and i64 %g.0, -256 52 %ins = or i64 %mask, 1 53 %sub = add nsw i32 %f.1.0, -1 54 br label %for.cond 55 56for.end: ; preds = %lor.end, %for.cond 57 ret void 58} 59