1; RUN: llc < %s -march=x86 -stats |& grep {Number of blocks eliminated} | grep 6 2; PR1296 3 4target 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" 5target triple = "i686-apple-darwin8" 6 7define i32 @foo(i32 %A, i32 %B, i32 %C) nounwind { 8entry: 9 switch i32 %A, label %out [ 10 i32 1, label %bb 11 i32 0, label %bb13 12 i32 2, label %bb35 13 ] 14 15bb: ; preds = %cond_next, %entry 16 %i.144.1 = phi i32 [ 0, %entry ], [ %tmp7, %cond_next ] ; <i32> [#uses=2] 17 %tmp4 = and i32 %i.144.1, %B ; <i32> [#uses=1] 18 icmp eq i32 %tmp4, 0 ; <i1>:0 [#uses=1] 19 br i1 %0, label %cond_next, label %out 20 21cond_next: ; preds = %bb 22 %tmp7 = add i32 %i.144.1, 1 ; <i32> [#uses=2] 23 icmp slt i32 %tmp7, 1000 ; <i1>:1 [#uses=1] 24 br i1 %1, label %bb, label %out 25 26bb13: ; preds = %cond_next18, %entry 27 %i.248.1 = phi i32 [ 0, %entry ], [ %tmp20, %cond_next18 ] ; <i32> [#uses=2] 28 %tmp16 = and i32 %i.248.1, %C ; <i32> [#uses=1] 29 icmp eq i32 %tmp16, 0 ; <i1>:2 [#uses=1] 30 br i1 %2, label %cond_next18, label %out 31 32cond_next18: ; preds = %bb13 33 %tmp20 = add i32 %i.248.1, 1 ; <i32> [#uses=2] 34 icmp slt i32 %tmp20, 1000 ; <i1>:3 [#uses=1] 35 br i1 %3, label %bb13, label %out 36 37bb27: ; preds = %bb35 38 %tmp30 = and i32 %i.3, %C ; <i32> [#uses=1] 39 icmp eq i32 %tmp30, 0 ; <i1>:4 [#uses=1] 40 br i1 %4, label %cond_next32, label %out 41 42cond_next32: ; preds = %bb27 43 %indvar.next = add i32 %i.3, 1 ; <i32> [#uses=1] 44 br label %bb35 45 46bb35: ; preds = %entry, %cond_next32 47 %i.3 = phi i32 [ %indvar.next, %cond_next32 ], [ 0, %entry ] ; <i32> [#uses=3] 48 icmp slt i32 %i.3, 1000 ; <i1>:5 [#uses=1] 49 br i1 %5, label %bb27, label %out 50 51out: ; preds = %bb27, %bb35, %bb13, %cond_next18, %bb, %cond_next, %entry 52 %result.0 = phi i32 [ 0, %entry ], [ 1, %bb ], [ 0, %cond_next ], [ 1, %bb13 ], [ 0, %cond_next18 ], [ 1, %bb27 ], [ 0, %bb35 ] ; <i32> [#uses=1] 53 ret i32 %result.0 54} 55