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1; RUN: opt < %s -loop-reduce | llvm-dis2; PR33993 4@g_53 = external global i32 ; <ptr> [#uses=1]5 6define i32 @foo() nounwind {7bb5.thread:8 br label %bb9 10bb: ; preds = %bb5, %bb5.thread11 %indvar = phi i32 [ 0, %bb5.thread ], [ %indvar.next, %bb5 ] ; <i32> [#uses=2]12 br i1 false, label %bb5, label %bb113 14bb1: ; preds = %bb15 %l_2.0.reg2mem.0 = sub i32 0, %indvar ; <i32> [#uses=1]16 %0 = load volatile i32, ptr @g_53, align 4 ; <i32> [#uses=1]17 %1 = trunc i32 %l_2.0.reg2mem.0 to i16 ; <i16> [#uses=1]18 %2 = trunc i32 %0 to i16 ; <i16> [#uses=1]19 %3 = mul i16 %2, %1 ; <i16> [#uses=1]20 %4 = icmp eq i16 %3, 0 ; <i1> [#uses=1]21 br i1 %4, label %bb7, label %bb222 23bb2: ; preds = %bb2, %bb124 br label %bb225 26bb5: ; preds = %bb27 %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]28 br label %bb29 30bb7: ; preds = %bb131 ret i32 132}33