1 ; RUN: llc -verify-machineinstrs < %s | FileCheck %s
3 target datalayout = "E-p:32:32"
4 target triple = "powerpc-unknown-linux-gnu"
7 ; There are 4 inner loops (%bb, %bb12, %bb25, %bb38) that all exit to %cond_next48
8 ; The last (whichever it is) should have a fallthrough exit, and the other three
9 ; need an unconditional branch. No other block should have an unconditional
10 ; branch to cond_next48
12 ;CHECK: .LBB0_7: # %cond_next48
17 define void @foo(i32 %W, i32 %X, i32 %Y, i32 %Z) {
19 %tmp1 = and i32 %W, 1 ; <i32> [#uses=1]
20 %tmp1.upgrd.1 = icmp eq i32 %tmp1, 0 ; <i1> [#uses=1]
21 br i1 %tmp1.upgrd.1, label %cond_false, label %bb5
22 bb: ; preds = %bb5, %bb
23 %indvar77 = phi i32 [ %indvar.next78, %bb ], [ 0, %bb5 ] ; <i32> [#uses=1]
24 %tmp2 = tail call i32 (...) @bar( ) ; <i32> [#uses=0]
25 %indvar.next78 = add i32 %indvar77, 1 ; <i32> [#uses=2]
26 %exitcond79 = icmp eq i32 %indvar.next78, %X ; <i1> [#uses=1]
27 br i1 %exitcond79, label %cond_next48, label %bb
29 %tmp = icmp eq i32 %X, 0 ; <i1> [#uses=1]
30 br i1 %tmp, label %cond_next48, label %bb
31 cond_false: ; preds = %entry
32 %tmp10 = and i32 %W, 2 ; <i32> [#uses=1]
33 %tmp10.upgrd.2 = icmp eq i32 %tmp10, 0 ; <i1> [#uses=1]
34 br i1 %tmp10.upgrd.2, label %cond_false20, label %bb16
35 bb12: ; preds = %bb16, %bb12
36 %indvar72 = phi i32 [ %indvar.next73, %bb12 ], [ 0, %bb16 ] ; <i32> [#uses=1]
37 %tmp13 = tail call i32 (...) @bar( ) ; <i32> [#uses=0]
38 %indvar.next73 = add i32 %indvar72, 1 ; <i32> [#uses=2]
39 %exitcond74 = icmp eq i32 %indvar.next73, %Y ; <i1> [#uses=1]
40 br i1 %exitcond74, label %cond_next48, label %bb12
41 bb16: ; preds = %cond_false
42 %tmp18 = icmp eq i32 %Y, 0 ; <i1> [#uses=1]
43 br i1 %tmp18, label %cond_next48, label %bb12
44 cond_false20: ; preds = %cond_false
45 %tmp23 = and i32 %W, 4 ; <i32> [#uses=1]
46 %tmp23.upgrd.3 = icmp eq i32 %tmp23, 0 ; <i1> [#uses=1]
47 br i1 %tmp23.upgrd.3, label %cond_false33, label %bb29
48 bb25: ; preds = %bb29, %bb25
49 %indvar67 = phi i32 [ %indvar.next68, %bb25 ], [ 0, %bb29 ] ; <i32> [#uses=1]
50 %tmp26 = tail call i32 (...) @bar( ) ; <i32> [#uses=0]
51 %indvar.next68 = add i32 %indvar67, 1 ; <i32> [#uses=2]
52 %exitcond69 = icmp eq i32 %indvar.next68, %Z ; <i1> [#uses=1]
53 br i1 %exitcond69, label %cond_next48, label %bb25
54 bb29: ; preds = %cond_false20
55 %tmp31 = icmp eq i32 %Z, 0 ; <i1> [#uses=1]
56 br i1 %tmp31, label %cond_next48, label %bb25
57 cond_false33: ; preds = %cond_false20
58 %tmp36 = and i32 %W, 8 ; <i32> [#uses=1]
59 %tmp36.upgrd.4 = icmp eq i32 %tmp36, 0 ; <i1> [#uses=1]
60 br i1 %tmp36.upgrd.4, label %cond_next48, label %bb42
62 %tmp39 = tail call i32 (...) @bar( ) ; <i32> [#uses=0]
63 %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
65 bb42: ; preds = %bb38, %cond_false33
66 %indvar = phi i32 [ %indvar.next, %bb38 ], [ 0, %cond_false33 ] ; <i32> [#uses=4]
67 %W_addr.0 = sub i32 %W, %indvar ; <i32> [#uses=1]
68 %exitcond = icmp eq i32 %indvar, %W ; <i1> [#uses=1]
69 br i1 %exitcond, label %cond_next48, label %bb38
70 cond_next48: ; preds = %bb42, %cond_false33, %bb29, %bb25, %bb16, %bb12, %bb5, %bb
71 %W_addr.1 = phi i32 [ %W, %bb5 ], [ %W, %bb16 ], [ %W, %bb29 ], [ %W, %cond_false33 ], [ %W_addr.0, %bb42 ], [ %W, %bb25 ], [ %W, %bb12 ], [ %W, %bb ] ; <i32> [#uses=1]
72 %tmp50 = icmp eq i32 %W_addr.1, 0 ; <i1> [#uses=1]
73 br i1 %tmp50, label %UnifiedReturnBlock, label %cond_true51
74 cond_true51: ; preds = %cond_next48
75 %tmp52 = tail call i32 (...) @bar( ) ; <i32> [#uses=0]
77 UnifiedReturnBlock: ; preds = %cond_next48