1 ; RUN: llvm-as <%s -bitcode-mdindex-threshold=0 | llvm-bcanalyzer -dump | FileCheck %s
2 ; Check that nodes are emitted in post-order to minimize the need for temporary
3 ; nodes. The graph structure is designed to foil naive implementations of
4 ; iteratitive post-order traersals: the leaves, !3 and !4, are reachable from
5 ; the entry node, !6, as well as from !5. There is one leaf on either side to
6 ; be sure it tickles bugs whether operands are visited forward or reverse.
8 ; Nodes in this testcase are numbered to match how they are referenced in
9 ; bitcode. !3 is referenced as opN=3.
11 ; We don't care about the order of the strings (or of !3 and !4). Let's just
12 ; make sure the strings are first and make it clear that there are two of them.
13 ; CHECK: <STRINGS {{.*}} num-strings = 2 {
18 ; Before the records we emit an offset to the index for the block
19 ; CHECK-NEXT: <INDEX_OFFSET
21 ; The leafs should come first (in either order).
22 ; CHECK-NEXT: <NODE op0=1/>
23 ; CHECK-NEXT: <NODE op0=2/>
27 ; CHECK-NEXT: <NODE op0=3 op1=4/>
30 ; CHECK-NEXT: <NODE op0=3 op1=5 op2=4/>
33 ; Before the named records we emit the index containing the position of the
34 ; previously emitted records
35 ; CHECK-NEXT: <INDEX {{.*}} (offset match)
37 ; Note: named metadata nodes are not cannot reference null so their operands
38 ; are numbered off-by-one.
40 ; CHECK-NEXT: <NAMED_NODE op0=5/>