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1; REQUIRES: asserts2; RUN: llc < %s -disable-preheader-prot=true -stats 2>&1 | grep "Number of blocks eliminated" | grep 33; RUN: llc < %s -disable-preheader-prot=true -stats -cgp-freq-ratio-to-skip-merge=10 2>&1 | grep "Number of blocks eliminated" | grep 64; RUN: llc < %s -disable-preheader-prot=false -stats 2>&1 | grep "Number of blocks eliminated" | grep 35; PR12966 7target 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"8target triple = "i686-apple-darwin8"9 10define i32 @foo(i32 %A, i32 %B, i32 %C) nounwind {11entry:12 switch i32 %A, label %out [13 i32 1, label %bb14 i32 0, label %bb1315 i32 2, label %bb3516 ]17 18bb: ; preds = %cond_next, %entry19 %i.144.1 = phi i32 [ 0, %entry ], [ %tmp7, %cond_next ] ; <i32> [#uses=2]20 %tmp4 = and i32 %i.144.1, %B ; <i32> [#uses=1]21 icmp eq i32 %tmp4, 0 ; <i1>:0 [#uses=1]22 br i1 %0, label %cond_next, label %out23 24cond_next: ; preds = %bb25 %tmp7 = add i32 %i.144.1, 1 ; <i32> [#uses=2]26 icmp slt i32 %tmp7, 1000 ; <i1>:1 [#uses=1]27 br i1 %1, label %bb, label %out28 29bb13: ; preds = %cond_next18, %entry30 %i.248.1 = phi i32 [ 0, %entry ], [ %tmp20, %cond_next18 ] ; <i32> [#uses=2]31 %tmp16 = and i32 %i.248.1, %C ; <i32> [#uses=1]32 icmp eq i32 %tmp16, 0 ; <i1>:2 [#uses=1]33 br i1 %2, label %cond_next18, label %out34 35cond_next18: ; preds = %bb1336 %tmp20 = add i32 %i.248.1, 1 ; <i32> [#uses=2]37 icmp slt i32 %tmp20, 1000 ; <i1>:3 [#uses=1]38 br i1 %3, label %bb13, label %out39 40bb27: ; preds = %bb3541 %tmp30 = and i32 %i.3, %C ; <i32> [#uses=1]42 icmp eq i32 %tmp30, 0 ; <i1>:4 [#uses=1]43 br i1 %4, label %cond_next32, label %out44 45cond_next32: ; preds = %bb2746 %indvar.next = add i32 %i.3, 1 ; <i32> [#uses=1]47 br label %bb3548 49bb35: ; preds = %entry, %cond_next3250 %i.3 = phi i32 [ %indvar.next, %cond_next32 ], [ 0, %entry ] ; <i32> [#uses=3]51 icmp slt i32 %i.3, 1000 ; <i1>:5 [#uses=1]52 br i1 %5, label %bb27, label %out53 54out: ; preds = %bb27, %bb35, %bb13, %cond_next18, %bb, %cond_next, %entry55 %result.0 = phi i32 [ 0, %entry ], [ 1, %bb ], [ 0, %cond_next ], [ 1, %bb13 ], [ 0, %cond_next18 ], [ 1, %bb27 ], [ 0, %bb35 ] ; <i32> [#uses=1]56 ret i32 %result.057}58