1 ; RUN: opt -called-value-propagation -S < %s | FileCheck %s
3 target triple = "aarch64-unknown-linux-gnueabi"
6 ; This test checks that we propagate the functions through arguments and attach
7 ; !callees metadata to the call. Such metadata can enable optimizations of this
10 ; For example, the code below a illustrates a contrived sort-like algorithm
11 ; that accepts a pointer to a comparison function. Since the indirect call to
12 ; the comparison function has only two targets, the call can be promoted to two
13 ; direct calls using an if-then-else. The loop can then be unswitched and the
14 ; called functions inlined. This essentially produces two loops, once
15 ; specialized for each comparison.
17 ; CHECK: %tmp3 = call i1 %cmp(i64* %tmp1, i64* %tmp2), !callees ![[MD:[0-9]+]]
18 ; CHECK: ![[MD]] = !{i1 (i64*, i64*)* @ugt, i1 (i64*, i64*)* @ule}
20 define void @test_argument(i64* %x, i64 %n, i1 %flag) {
23 br i1 %flag, label %then, label %else
26 call void @arrange_data(i64* %x, i64 %tmp0, i1 (i64*, i64*)* @ugt)
30 call void @arrange_data(i64* %x, i64 %tmp0, i1 (i64*, i64*)* @ule)
37 define internal void @arrange_data(i64* %x, i64 %n, i1 (i64*, i64*)* %cmp) {
39 %tmp0 = icmp eq i64 %n, 1
40 br i1 %tmp0, label %merge, label %for.body
43 %i = phi i64 [ 0, %entry ], [ %i.next, %cmp.false ]
44 %i.next = add nuw nsw i64 %i, 1
45 %tmp1 = getelementptr inbounds i64, i64* %x, i64 %i
46 %tmp2 = getelementptr inbounds i64, i64* %x, i64 %i.next
47 %tmp3 = call i1 %cmp(i64* %tmp1, i64* %tmp2)
48 br i1 %tmp3, label %cmp.true, label %cmp.false
51 call void @swap(i64* %tmp1, i64* %tmp2)
55 %cond = icmp slt i64 %i.next, %n
56 br i1 %cond, label %for.body, label %for.end
60 call void @arrange_data(i64* %x, i64 %tmp4, i1 (i64*, i64*)* %cmp)
67 define internal i1 @ugt(i64* %a, i64* %b) {
69 %tmp0 = load i64, i64* %a
70 %tmp1 = load i64, i64* %b
71 %tmp2 = icmp ugt i64 %tmp0, %tmp1
75 define internal i1 @ule(i64* %a, i64* %b) {
77 %tmp0 = load i64, i64* %a
78 %tmp1 = load i64, i64* %b
79 %tmp2 = icmp ule i64 %tmp0, %tmp1
83 declare void @swap(i64*, i64*)