[PATCH 1/3] sparse, llvm: Fix symbol initializer code generation

[Pekka Enberg <penberg@kernel.org>]

The output_data() function does not see right hand side symbols for expressions
such as this in target.c:

  struct symbol *size_t_ctype = &uint_ctype;

Therefore, call output_data() recursively if LLVMGetNamedGlobal() returns NULL
for a symbol.

Cc: Christopher Li <sparse@chrisli.org>
Cc: Jeff Garzik <jgarzik@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---
 sparse-llvm.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/sparse-llvm.c b/sparse-llvm.c
index c037e02..ca49a6e 100644
--- a/sparse-llvm.c
+++ b/sparse-llvm.c
@@ -1055,7 +1055,7 @@ static void output_fn(LLVMModuleRef module, struct entrypoint *ep)
 	END_FOR_EACH_PTR(bb);
 }
 
-static int output_data(LLVMModuleRef module, struct symbol *sym)
+static LLVMValueRef output_data(LLVMModuleRef module, struct symbol *sym)
 {
 	struct expression *initializer = sym->initializer;
 	LLVMValueRef initial_value;
@@ -1071,6 +1071,8 @@ static int output_data(LLVMModuleRef module, struct symbol *sym)
 			struct symbol *sym = initializer->symbol;
 
 			initial_value = LLVMGetNamedGlobal(module, show_ident(sym->ident));
+			if (!initial_value)
+				initial_value = output_data(module, sym);
 			break;
 		}
 		default:
@@ -1090,7 +1092,7 @@ static int output_data(LLVMModuleRef module, struct symbol *sym)
 
 	LLVMSetInitializer(data, initial_value);
 
-	return 0;
+	return data;
 }
 
 static int compile(LLVMModuleRef module, struct symbol_list *list)
-- 
1.7.6.4