[llvm] [C API] Add blockaddress getters to C API (PR #81382)

[Nikita Popov via llvm-commits]

================
@@ -136,3 +136,31 @@ int llvm_module_list_globals(void) {
 
   return 0;
 }
+
+int llvm_module_list_global_block_address_values(void) {
+  LLVMModuleRef M = llvm_load_module(false, false);
+  LLVMValueRef g;
+
+  g = LLVMGetFirstGlobal(M);
+  while (g) {
+    LLVMValueRef GInit = LLVMGetInitializer(g);
+
+    if (GInit && LLVMIsABlockAddress(GInit)) {
+      const char *GlobalName = LLVMGetValueName(g);
+      LLVMValueRef Func = LLVMGetBlockAddressFunction(GInit);
+      LLVMBasicBlockRef BB = LLVMGetBlockAddressBasicBlock(GInit);
+
+      const char *FuncName = LLVMGetValueName(Func);
+      const char *BBName = LLVMGetBasicBlockName(BB);
+
+      printf("BlockAddress '%s' Func '%s' Basic Block '%s'\n", GlobalName,
+             FuncName, BBName);
+    }
+
+    g = LLVMGetNextGlobal(g);
+  }
+
+  LLVMDisposeModule(M);
+
+  return 0;
+}
----------------
nikic wrote:

You don't have to go through llvm-c-test with IR input, you can also directly add a unit test in https://github.com/llvm/llvm-project/blob/main/llvm/unittests/IR/ConstantsTest.cpp. Basically just call LLVMBlockAddress and then the getter on that and check that the inputs & outputs are the same.

https://github.com/llvm/llvm-project/pull/81382