1 ; REQUIRES: asserts 2 ; RUN: llc < %s -march=x86 -stats 2>&1 | grep "Number of blocks eliminated" | grep 6 3 ; PR1296 4 5 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" 6 target triple = "i686-apple-darwin8" 7 8 define i32 @foo(i32 %A, i32 %B, i32 %C) nounwind { 9 entry: 10 switch i32 %A, label %out [ 11 i32 1, label %bb 12 i32 0, label %bb13 13 i32 2, label %bb35 14 ] 15 16 bb: ; preds = %cond_next, %entry 17 %i.144.1 = phi i32 [ 0, %entry ], [ %tmp7, %cond_next ] ; <i32> [#uses=2] 18 %tmp4 = and i32 %i.144.1, %B ; <i32> [#uses=1] 19 icmp eq i32 %tmp4, 0 ; <i1>:0 [#uses=1] 20 br i1 %0, label %cond_next, label %out 21 22 cond_next: ; preds = %bb 23 %tmp7 = add i32 %i.144.1, 1 ; <i32> [#uses=2] 24 icmp slt i32 %tmp7, 1000 ; <i1>:1 [#uses=1] 25 br i1 %1, label %bb, label %out 26 27 bb13: ; preds = %cond_next18, %entry 28 %i.248.1 = phi i32 [ 0, %entry ], [ %tmp20, %cond_next18 ] ; <i32> [#uses=2] 29 %tmp16 = and i32 %i.248.1, %C ; <i32> [#uses=1] 30 icmp eq i32 %tmp16, 0 ; <i1>:2 [#uses=1] 31 br i1 %2, label %cond_next18, label %out 32 33 cond_next18: ; preds = %bb13 34 %tmp20 = add i32 %i.248.1, 1 ; <i32> [#uses=2] 35 icmp slt i32 %tmp20, 1000 ; <i1>:3 [#uses=1] 36 br i1 %3, label %bb13, label %out 37 38 bb27: ; preds = %bb35 39 %tmp30 = and i32 %i.3, %C ; <i32> [#uses=1] 40 icmp eq i32 %tmp30, 0 ; <i1>:4 [#uses=1] 41 br i1 %4, label %cond_next32, label %out 42 43 cond_next32: ; preds = %bb27 44 %indvar.next = add i32 %i.3, 1 ; <i32> [#uses=1] 45 br label %bb35 46 47 bb35: ; preds = %entry, %cond_next32 48 %i.3 = phi i32 [ %indvar.next, %cond_next32 ], [ 0, %entry ] ; <i32> [#uses=3] 49 icmp slt i32 %i.3, 1000 ; <i1>:5 [#uses=1] 50 br i1 %5, label %bb27, label %out 51 52 out: ; preds = %bb27, %bb35, %bb13, %cond_next18, %bb, %cond_next, %entry 53 %result.0 = phi i32 [ 0, %entry ], [ 1, %bb ], [ 0, %cond_next ], [ 1, %bb13 ], [ 0, %cond_next18 ], [ 1, %bb27 ], [ 0, %bb35 ] ; <i32> [#uses=1] 54 ret i32 %result.0 55 } 56
