Add testdata for a function with two conditionals that eventually join

PiperOrigin-RevId: 696656402

Author: dhoekwater

propeller/testdata/BUILD

@@ -46,6 +46,7 @@ exports_files([
     "sample.bin",
     "sample.c",
     "sample_section.bin",
+    "simple_conditionals_join.protobuf",
     "test_comdat.h",
     "test_comdat_1.cc",
     "test_comdat_2.cc",

propeller/testdata/simple_conditionals_join.protobuf

@@ -0,0 +1,93 @@
+## CFG consisting of a function with two conditionals which eventually join on
+## a single return basic block. In addition, size of foo.2 is zero.
+##
+##      foo
+##      |  \
+##      |   \110
+##      |    \
+##      |     v
+##   150|     foo.1
+##      |     /   \
+##      |    /100  \10
+##      |   /       \
+##      v  v         v
+##     foo.2        foo.3
+##       \           /
+##        \         /
+##     250 \       /10
+##          \     /
+##           v   v
+##            foo.4
+
+cfg {
+  name: "foo"
+  function_index: 10
+  node {
+    bb_id: 0
+    size: 10
+    out_edges {
+      sink {
+        function_index: 10
+        bb_index: 1
+      }
+      weight: 110
+      kind: BRANCH_OR_FALLTHROUGH
+    }
+    out_edges {
+      sink {
+        function_index: 10
+        bb_index: 2
+      }
+      weight: 150
+      kind: BRANCH_OR_FALLTHROUGH
+    }
+  }
+  node {
+    bb_id: 1
+    size: 4
+    out_edges {
+      sink {
+        function_index: 10
+        bb_index: 2
+      }
+      weight: 100
+      kind: BRANCH_OR_FALLTHROUGH
+    }
+    out_edges {
+      sink {
+        function_index: 10
+        bb_index: 3
+      }
+      weight: 10
+      kind: BRANCH_OR_FALLTHROUGH
+    }
+  }
+  node {
+    bb_id: 2
+    size: 0
+    out_edges {
+      sink {
+        function_index: 10
+        bb_index: 4
+      }
+      weight: 250
+      kind: BRANCH_OR_FALLTHROUGH
+    }
+  }
+  node {
+    bb_id: 3
+    size: 2
+    out_edges {
+      sink {
+        function_index: 10
+        bb_index: 4
+      }
+      weight: 10
+      kind: BRANCH_OR_FALLTHROUGH
+    }
+  }
+  node {
+    bb_id: 4
+    size: 2
+  }
+}