1 ; REQUIRES: asserts 2 ; RUN: llc < %s -disable-preheader-prot=true -stats 2>&1 | grep "Number of blocks eliminated" | grep 3 3 ; RUN: llc < %s -disable-preheader-prot=true -stats -cgp-freq-ratio-to-skip-merge=10 2>&1 | grep "Number of blocks eliminated" | grep 6 4 ; RUN: llc < %s -disable-preheader-prot=false -stats 2>&1 | grep "Number of blocks eliminated" | grep 3 5 ; PR1296 6 7 target 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" 8 target triple = "i686-apple-darwin8" 9 10 define i32 @foo(i32 %A, i32 %B, i32 %C) nounwind { 11 entry: 12 switch i32 %A, label %out [ 13 i32 1, label %bb 14 i32 0, label %bb13 15 i32 2, label %bb35 16 ] 17 18 bb: ; preds = %cond_next, %entry 19 %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 %out 23 24 cond_next: ; preds = %bb 25 %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 %out 28 29 bb13: ; preds = %cond_next18, %entry 30 %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 %out 34 35 cond_next18: ; preds = %bb13 36 %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 %out 39 40 bb27: ; preds = %bb35 41 %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 %out 44 45 cond_next32: ; preds = %bb27 46 %indvar.next = add i32 %i.3, 1 ; <i32> [#uses=1] 47 br label %bb35 48 49 bb35: ; preds = %entry, %cond_next32 50 %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 %out 53 54 out: ; preds = %bb27, %bb35, %bb13, %cond_next18, %bb, %cond_next, %entry 55 %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.0 57 } 58
