From d4ca9de33906972fa06bd2b7e38cbc2b4d3574c2 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Thu, 14 Mar 2019 21:24:44 +0100
Subject: Add ssa string

---
 src/ssa/ssa.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 50 insertions(+), 8 deletions(-)

(limited to 'src/ssa')

diff --git a/src/ssa/ssa.c b/src/ssa/ssa.c
index 1b5ed3d..b8aa8b0 100644
--- a/src/ssa/ssa.c
+++ b/src/ssa/ssa.c
@@ -1,6 +1,7 @@
 #include "../../include/ssa/ssa.h"
 #include "../../include/std/mem.h"
 #include "../../include/std/log.h"
+#include "../../include/std/hash.h"
 #include "../../include/ast.h"
 #include <assert.h>
 
@@ -47,7 +48,9 @@ SsaNumber create_ssa_float(f64 value) {
 int ssa_init(Ssa *self, ScopedAllocator *allocator) {
     return_if_error(buffer_init(&self->instructions, allocator));
     return_if_error(hash_map_init(&self->intermediates, allocator, sizeof(SsaIntermediateIndex), compare_number, hash_number));
+    return_if_error(hash_map_init(&self->strings, allocator, sizeof(SsaStringIndex), hash_compare_string, amal_hash_string));
     self->intermediate_counter = 0;
+    self->string_counter = 0;
     self->reg_counter = 0;
     self->func_counter = 0;
     return 0;
@@ -91,6 +94,24 @@ static CHECK_RESULT int ssa_try_add_intermediate(Ssa *self, SsaNumber number, Ss
     return hash_map_insert(&self->intermediates, key, result_index);
 }
 
+static CHECK_RESULT int ssa_try_add_string(Ssa *self, BufferView str, SsaStringIndex *result_index) {
+    bool exists;
+    assert(result_index);
+
+    exists = hash_map_get(&self->strings, str, result_index);
+    if(exists)
+        return 0;
+    
+    /* Overflow */
+    if(self->string_counter + 1 < self->string_counter)
+        return -1;
+    
+    *result_index = self->string_counter;
+    ++self->string_counter;
+    amal_log_debug("s%u = \"%.*s\"", *result_index, str.size, str.data);
+    return hash_map_insert(&self->strings, str, result_index);
+}
+
 static CHECK_RESULT int ssa_add_ins_form1(Ssa *self, SsaInstructionType ins_type, SsaRegister lhs, u16 rhs) {
     usize index;
     index = self->instructions.size;
@@ -128,6 +149,13 @@ int ssa_ins_assign_inter(Ssa *self, SsaRegister dest, SsaNumber number) {
     return ssa_add_ins_form1(self, SSA_ASSIGN_INTER, dest, index);
 }
 
+int ssa_ins_assign_string(Ssa *self, SsaRegister dest, BufferView str) {
+    SsaStringIndex index;
+    return_if_error(ssa_try_add_string(self, str, &index));
+    amal_log_debug("r%u = s%u", dest, index);
+    return ssa_add_ins_form1(self, SSA_ASSIGN_STRING, dest, index);
+}
+
 int ssa_ins_assign_reg(Ssa *self, SsaRegister dest, SsaRegister src) {
     amal_log_debug("r%u = r%u", dest, src);
     return ssa_add_ins_form1(self, SSA_ASSIGN_INTER, dest, src);
@@ -208,30 +236,43 @@ static CHECK_RESULT SsaRegister number_generate_ssa(Number *self, SsaCompilerCon
 
 static CHECK_RESULT SsaRegister funcdecl_generate_ssa(FunctionDecl *self, SsaCompilerContext *context) {
     /* TODO: Implement */
+    throw_if_error(ssa_ins_func_start(&context->ssa, 0, &self->ssa_func_index));
     scope_generate_ssa(&self->body, context);
+    throw_if_error(ssa_ins_func_end(&context->ssa));
     return 0;
 }
 
 static CHECK_RESULT SsaRegister funccall_generate_ssa(FunctionCall *self, SsaCompilerContext *context) {
     /* TODO: Implement */
-    (void)self;
-    (void)context;
-    return 0;
+    Ast *ast;
+    Ast *ast_end;
+    SsaRegister reg;
+
+    ast = buffer_start(&self->args);
+    ast_end = buffer_end(&self->args);
+    for(; ast != ast_end; ++ast) {
+        SsaRegister arg_reg;
+        arg_reg = ast_generate_ssa(ast, context);
+        throw_if_error(ssa_ins_push(&context->ssa, arg_reg));
+    }
+    /* TODO: Use real func index */
+    throw_if_error(ssa_ins_call(&context->ssa, 0, &reg));
+    return reg;
 }
 
 static CHECK_RESULT SsaRegister lhs_generate_ssa(LhsExpr *self, SsaCompilerContext *context) {
     /* TODO: Implement */
     SsaRegister rhs_reg;
-    amal_log_debug("lhs_generate_ssa");
     rhs_reg = ast_generate_ssa(&self->rhs_expr, context);
+    /* TODO: Is this correct? */
     return rhs_reg;
 }
 
 static CHECK_RESULT SsaRegister string_generate_ssa(String *self, SsaCompilerContext *context) {
-    /* TODO: Implement */
-    (void)self;
-    (void)context;
-    return 0;
+    SsaRegister reg;
+    throw_if_error(ssa_get_unique_reg(&context->ssa, &reg));
+    throw_if_error(ssa_ins_assign_string(&context->ssa, reg, self->str));
+    return reg;
 }
 
 static CHECK_RESULT SsaRegister variable_generate_ssa(Variable *self, SsaCompilerContext *context) {
@@ -269,6 +310,7 @@ static CHECK_RESULT SsaRegister binop_generate_ssa(Binop *self, SsaCompilerConte
 }
 
 CHECK_RESULT SsaRegister ast_generate_ssa(Ast *self, SsaCompilerContext *context) {
+    assert(self->resolve_status == AST_RESOLVED);
     switch(self->type) {
         case AST_NONE:
             return 0;
-- 
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