1 ; RUN: llc < %s -mtriple=thumbv7-apple-darwin | FileCheck %s
4 define i32 @t1(i32 %a, i32 %b, i32 %c, i32 %d) nounwind {
8 switch i32 %c, label %cond_next [
9 i32 1, label %cond_true
10 i32 7, label %cond_true
14 %tmp12 = add i32 %a, 1
15 %tmp1518 = add i32 %tmp12, %b
19 %tmp15 = add i32 %b, %a
23 ; FIXME: Check for # of unconditional branch after adding branch folding post ifcvt.
24 define i32 @t2(i32 %a, i32 %b) nounwind {
30 %tmp1434 = icmp eq i32 %a, %b ; <i1> [#uses=1]
31 br i1 %tmp1434, label %bb17, label %bb.outer
33 bb.outer: ; preds = %cond_false, %entry
34 %b_addr.021.0.ph = phi i32 [ %b, %entry ], [ %tmp10, %cond_false ] ; <i32> [#uses=5]
35 %a_addr.026.0.ph = phi i32 [ %a, %entry ], [ %a_addr.026.0, %cond_false ] ; <i32> [#uses=1]
38 bb: ; preds = %cond_true, %bb.outer
39 %indvar = phi i32 [ 0, %bb.outer ], [ %indvar.next, %cond_true ] ; <i32> [#uses=2]
40 %tmp. = sub i32 0, %b_addr.021.0.ph ; <i32> [#uses=1]
41 %tmp.40 = mul i32 %indvar, %tmp. ; <i32> [#uses=1]
42 %a_addr.026.0 = add i32 %tmp.40, %a_addr.026.0.ph ; <i32> [#uses=6]
43 %tmp3 = icmp sgt i32 %a_addr.026.0, %b_addr.021.0.ph ; <i1> [#uses=1]
44 br i1 %tmp3, label %cond_true, label %cond_false
46 cond_true: ; preds = %bb
47 %tmp7 = sub i32 %a_addr.026.0, %b_addr.021.0.ph ; <i32> [#uses=2]
48 %tmp1437 = icmp eq i32 %tmp7, %b_addr.021.0.ph ; <i1> [#uses=1]
49 %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
50 br i1 %tmp1437, label %bb17, label %bb
52 cond_false: ; preds = %bb
53 %tmp10 = sub i32 %b_addr.021.0.ph, %a_addr.026.0 ; <i32> [#uses=2]
54 %tmp14 = icmp eq i32 %a_addr.026.0, %tmp10 ; <i1> [#uses=1]
55 br i1 %tmp14, label %bb17, label %bb.outer
57 bb17: ; preds = %cond_false, %cond_true, %entry
58 %a_addr.026.1 = phi i32 [ %a, %entry ], [ %tmp7, %cond_true ], [ %a_addr.026.0, %cond_false ] ; <i32> [#uses=1]
62 @x = external global i32* ; <i32**> [#uses=1]
64 define void @foo(i32 %a) nounwind {
66 %tmp = load i32*, i32** @x ; <i32*> [#uses=1]
67 store i32 %a, i32* %tmp
71 ; Tail call prevents use of ifcvt in this one. Seems like a win though.
72 define void @t3(i32 %a, i32 %b) nounwind {
77 ; CHECK: b.w _foo @ TAILCALL
78 %tmp1 = icmp sgt i32 %a, 10 ; <i1> [#uses=1]
79 br i1 %tmp1, label %cond_true, label %UnifiedReturnBlock
81 cond_true: ; preds = %entry
82 tail call void @foo( i32 %b )
85 UnifiedReturnBlock: ; preds = %entry