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; RUN: opt -instcombine -S < %s | FileCheck %s
; This used to crash opt
@c = common global i32 0, align 4
@b = common global i32 0, align 4
@a = common global i16 0, align 2
@d = common global i32 0, align 4
define void @fn3() {
; CHECK: @fn3
bb:
%tmp = load i32, i32* @c, align 4
%tmp1 = icmp eq i32 %tmp, 0
br i1 %tmp1, label %bb2, label %bb6
bb2: ; preds = %bb
%tmp3 = load i32, i32* @b, align 4
%tmp.i = add nsw i32 255, %tmp3
%tmp5 = icmp ugt i32 %tmp.i, 254
br label %bb6
bb6: ; preds = %bb, %bb2
%tmp7 = phi i1 [ true, %bb ], [ %tmp5, %bb2 ]
%tmp8 = zext i1 %tmp7 to i32
%tmp10 = icmp eq i32 %tmp8, 0
%tmp12 = load i16, i16* @a, align 2
%tmp14 = icmp ne i16 %tmp12, 0
%tmp16 = select i1 %tmp10, i1 false, i1 %tmp14
%tmp17 = zext i1 %tmp16 to i32
store i32 %tmp17, i32* @d, align 4
ret void
}
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