1 files changed, 24 insertions, 3 deletions
diff --git a/include/ssa/ssa.h b/include/ssa/ssa.h
index 21d7f40..b2c8065 100644
--- a/include/ssa/ssa.h
+++ b/include/ssa/ssa.h
@@ -8,6 +8,8 @@
 
 #include <setjmp.h>
 
+#define SSA_ERR_EXTERN_FUNC_SIG_MISMATCH -20
+
 typedef enum {
     SSA_ASSIGN_INTER,
     SSA_ASSIGN_STRING,
@@ -23,6 +25,7 @@ typedef enum {
     SSA_FUNC_END,
     SSA_PUSH,
     SSA_CALL,
+    SSA_CALL_EXTERN,
     SSA_JUMP_ZERO,
     SSA_JUMP,
     SSA_RET
@@ -41,10 +44,16 @@ typedef struct {
     SsaNumberType type;
 } SsaNumber;
 
+typedef struct {
+    FunctionSignature *func_sig;
+    BufferView name;
+} SsaExternFunc;
+
 typedef i16 JumpOffset;
-typedef u16 SsaRegister;
+typedef i16 SsaRegister;
 typedef u16 SsaIntermediateIndex;
 typedef u16 SsaStringIndex;
+typedef u16 SsaExternFuncIndex;
 typedef u16 SsaFuncIndex;
 
 typedef struct {
@@ -53,10 +62,15 @@ typedef struct {
     Buffer/*SsaNumber*/ intermediates;
     HashMapType(BufferView, SsaStringIndex) strings_map;
     Buffer/*BufferView*/ strings;
+    HashMapType(BufferView, SsaExternFuncIndex) extern_funcs_map;
+    Buffer/*SsaExternFunc*/ extern_funcs;
     SsaIntermediateIndex intermediate_counter;
     SsaStringIndex string_counter;
+    SsaExternFuncIndex extern_func_counter;
     SsaRegister reg_counter;
+    SsaRegister param_counter;
     SsaFuncIndex func_counter;
+    Parser *parser; /* Borrowed */
 } Ssa;
 
 typedef struct {
@@ -72,7 +86,8 @@ typedef struct {
 
 typedef struct {
     SsaFuncIndex func_index;
-    u16 num_registers;
+    u16 num_params_regs;
+    u16 num_local_vars_regs;
 } SsaInsFuncStart;
 
 typedef struct {
@@ -82,6 +97,12 @@ typedef struct {
 } SsaInsFuncCall;
 
 typedef struct {
+    u8 num_args;
+    SsaRegister result;
+    SsaExternFuncIndex extern_func_index;
+} SsaInsFuncCallExtern;
+
+typedef struct {
     SsaRegister condition_reg;
     JumpOffset jump_offset;
 } SsaInsJumpZero;
@@ -97,7 +118,7 @@ SsaNumber create_ssa_float(f64 value);
 SsaNumber ssa_get_intermediate(Ssa *self, SsaIntermediateIndex index);
 BufferView ssa_get_string(Ssa *self, SsaStringIndex index);
 
-CHECK_RESULT int ssa_init(Ssa *self, ArenaAllocator *allocator);
+CHECK_RESULT int ssa_init(Ssa *self, Parser *parser);
 
 typedef struct {
     jmp_buf env;