[PATCH] sparse, llvm: Fix 'void *' pointer code generation

[Pekka Enberg <penberg@kernel.org>]

Sparse front-end generates SYM_PTR with SYM_BASETYPE with bit_size set to -1
for "void *" pointers. We currently map that to LLVMVoidType() but that no
longer works with LLVM Subversion trunk:

  $ ./sparse-llvm validation/backend/struct.c
  sparse-llvm: Type.cpp:676: static llvm::PointerType* llvm::PointerType::get(llvm::Type*, unsigned int): Assertion `isValidElementType(EltTy) && "Invalid type for pointer element!"' failed.
Aborted

Fix the issue by switching to LLVMIntType(bits_per_pointer) in
sym_basetype_type().

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 |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/sparse-llvm.c b/sparse-llvm.c
index a85dfea..ec46a04 100644
--- a/sparse-llvm.c
+++ b/sparse-llvm.c
@@ -80,7 +80,7 @@ static LLVMTypeRef sym_basetype_type(struct symbol *sym)
 	} else {
 		switch (sym->bit_size) {
 		case -1:
-			ret = LLVMVoidType();
+			ret = LLVMIntType(bits_in_pointer);
 			break;
 		case 8:
 			ret = LLVMInt8Type();
-- 
1.7.6.4