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-rw-r--r--src/codegen/ssa.cpp328
1 files changed, 205 insertions, 123 deletions
diff --git a/src/codegen/ssa.cpp b/src/codegen/ssa.cpp
index b7d925d07..bb1f51b81 100644
--- a/src/codegen/ssa.cpp
+++ b/src/codegen/ssa.cpp
@@ -31,7 +31,7 @@ struct ssaProcedure {
String name;
Entity *entity;
Type *type;
- DeclarationInfo *decl;
+ DeclInfo *decl;
AstNode *type_expr;
AstNode *body;
@@ -42,36 +42,26 @@ struct ssaProcedure {
-struct ssaTypeName {
- Entity *entity;
- Type *type;
-};
-struct ssaGlobal {
- b32 generated;
- Entity *entity;
- Type *type;
- ssaValue *value;
-};
-struct ssaConstant {
- Type *type;
- ExactValue value;
-};
-
-
+#define SSA_INSTRUCTION_KINDS \
+ SSA_INSTRUCTION_KIND(Invalid), \
+ SSA_INSTRUCTION_KIND(Local), \
+ SSA_INSTRUCTION_KIND(Store), \
+ SSA_INSTRUCTION_KIND(Load), \
+ SSA_INSTRUCTION_KIND(GetElementPtr), \
+ SSA_INSTRUCTION_KIND(Convert), \
+ SSA_INSTRUCTION_KIND(BinaryOp), \
+ SSA_INSTRUCTION_KIND(Count),
enum ssaInstructionKind {
- ssaInstruction_Invalid,
-
- ssaInstruction_Local,
- ssaInstruction_Store,
- ssaInstruction_Load,
- ssaInstruction_GetElementPtr,
-
- ssaInstruction_Convert,
-
- ssaInstruction_BinaryOp,
+#define SSA_INSTRUCTION_KIND(x) GB_JOIN2(ssaInstruction_, x)
+ SSA_INSTRUCTION_KINDS
+#undef SSA_INSTRUCTION_KIND
+};
- ssaInstruction_Count,
+String const ssa_instruction_strings[] = {
+#define SSA_INSTRUCTION_KIND(x) {cast(u8 *)#x, gb_size_of(#x)-1}
+ SSA_INSTRUCTION_KINDS
+#undef SSA_INSTRUCTION_KIND
};
struct ssaInstruction {
@@ -91,18 +81,18 @@ struct ssaInstruction {
ssaValue *value;
} store;
struct {
+ Type *type;
ssaValue *address;
} load;
struct {
ssaValue *address;
- Type *result_type;
- Type *element_type;
- isize index_count;
- isize indices[2];
+ Type * result_type;
+ Type * element_type;
+ ssaValue *indices[2];
+ isize index_count;
+ b32 inbounds;
} get_element_ptr;
-
-
struct {
Type *type;
Token op;
@@ -131,9 +121,20 @@ struct ssaValue {
i32 id;
union {
- ssaConstant constant;
- ssaTypeName type_name;
- ssaGlobal global;
+ struct {
+ Type * type;
+ ExactValue value;
+ } constant;
+ struct {
+ Entity *entity;
+ Type * type;
+ } type_name;
+ struct {
+ b32 generated;
+ Entity * entity;
+ Type * type;
+ ssaValue *value;
+ } global;
ssaProcedure procedure;
ssaBlock block;
ssaInstruction instruction;
@@ -188,7 +189,9 @@ Type *ssa_instruction_type(ssaInstruction *instr) {
case ssaInstruction_Store:
return ssa_value_type(instr->store.address);
case ssaInstruction_Load:
- return ssa_value_type(instr->load.address);
+ return instr->load.type;
+ case ssaInstruction_GetElementPtr:
+ return instr->get_element_ptr.result_type;
case ssaInstruction_BinaryOp:
return instr->binary_op.type;
}
@@ -204,7 +207,10 @@ void ssa_instruction_set_type(ssaInstruction *instr, Type *type) {
ssa_value_set_type(instr->store.value, type);
break;
case ssaInstruction_Load:
- // NOTE(bill): Do nothing
+ instr->load.type = type;
+ break;
+ case ssaInstruction_GetElementPtr:
+ instr->get_element_ptr.result_type = type;
break;
case ssaInstruction_BinaryOp:
instr->binary_op.type = type;
@@ -251,8 +257,8 @@ void ssa_value_set_type(ssaValue *value, Type *type) {
-ssaValue *ssa_build_expression(ssaProcedure *proc, AstNode *expr);
-ssaValue *ssa_build_single_expression(ssaProcedure *proc, AstNode *expr, TypeAndValue *tv);
+ssaValue *ssa_build_expr(ssaProcedure *proc, AstNode *expr);
+ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue *tv);
ssaLvalue ssa_build_address(ssaProcedure *proc, AstNode *expr);
ssaValue *ssa_emit_conversion(ssaProcedure *proc, ssaValue *value, Type *a_type);
@@ -318,16 +324,24 @@ ssaValue *ssa_make_instruction_load(ssaProcedure *p, ssaValue *address) {
ssaValue *v = ssa_alloc_instruction(p->module->allocator, ssaInstruction_Load);
ssaInstruction *i = &v->instruction;
i->load.address = address;
+ i->load.type = ssa_value_type(address);
if (p->curr_block) {
gb_array_append(p->curr_block->values, v);
}
return v;
}
-ssaValue *ssa_make_instruction_get_element_ptr(ssaProcedure *p, ssaValue *address) {
+ssaValue *ssa_make_instruction_get_element_ptr(ssaProcedure *p, ssaValue *address,
+ ssaValue *index0, ssaValue *index1, isize index_count,
+ b32 inbounds) {
ssaValue *v = ssa_alloc_instruction(p->module->allocator, ssaInstruction_GetElementPtr);
ssaInstruction *i = &v->instruction;
i->get_element_ptr.address = address;
+ i->get_element_ptr.indices[0] = index0;
+ i->get_element_ptr.indices[1] = index1;
+ i->get_element_ptr.index_count = index_count;
+ i->get_element_ptr.element_type = ssa_value_type(address);
+ i->get_element_ptr.inbounds = inbounds;
if (p->curr_block) {
gb_array_append(p->curr_block->values, v);
}
@@ -354,7 +368,7 @@ ssaValue *ssa_make_value_constant(gbAllocator a, Type *type, ExactValue value) {
return v;
}
-ssaValue *ssa_make_value_procedure(gbAllocator a, Entity *e, DeclarationInfo *decl, ssaModule *m) {
+ssaValue *ssa_make_value_procedure(gbAllocator a, Entity *e, DeclInfo *decl, ssaModule *m) {
ssaValue *v = ssa_alloc_value(a, ssaValue_Procedure);
v->procedure.module = m;
v->procedure.entity = e;
@@ -446,8 +460,8 @@ void ssa_end_procedure_body(ssaProcedure *proc) {
b32 ssa_is_blank_identifier(AstNode *i) {
- GB_ASSERT(i->kind == AstNode_Identifier);
- return are_strings_equal(i->identifier.token.string, make_string("_"));
+ GB_ASSERT(i->kind == AstNode_Ident);
+ return are_strings_equal(i->ident.token.string, make_string("_"));
}
@@ -485,8 +499,6 @@ ssaValue *ssa_emit_store(ssaProcedure *p, ssaValue *address, ssaValue *value) {
ssaValue *ssa_emit_load(ssaProcedure *p, ssaValue *address) {
ssaValue *v = ssa_make_instruction_load(p, address);
- Type *t = ssa_value_type(address);
- ssa_value_set_type(v, type_deref(t));
ssa_emit(p, v);
return v;
}
@@ -590,12 +602,12 @@ ssaValue *ssa_emit_compare(ssaProcedure *proc, Token op, ssaValue *left, ssaValu
return ssa_emit(proc, v);
}
-ssaValue *ssa_build_single_expression(ssaProcedure *proc, AstNode *expr, TypeAndValue *tv) {
+ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue *tv) {
switch (expr->kind) {
- case AstNode_Identifier: {
+ case AstNode_Ident: {
Entity *e = *map_get(&proc->module->info->uses, hash_pointer(expr));
if (e->kind == Entity_Builtin) {
- // TODO(bill): Entity_Builtin
+ GB_PANIC("TODO(bill): Entity_Builtin");
return NULL;
}
@@ -605,32 +617,34 @@ ssaValue *ssa_build_single_expression(ssaProcedure *proc, AstNode *expr, TypeAnd
}
} break;
- case AstNode_ParenExpression:
- return ssa_build_single_expression(proc, unparen_expression(expr), tv);
+ case AstNode_ParenExpr:
+ return ssa_build_single_expr(proc, unparen_expr(expr), tv);
- case AstNode_DereferenceExpression: {
- ssaLvalue addr = ssa_build_address(proc, expr->dereference_expression.operand);
- return ssa_lvalue_load(addr, proc);
+ case AstNode_DerefExpr: {
+ ssaLvalue addr = ssa_build_address(proc, expr);
+ ssaValue *load = ssa_lvalue_load(addr, proc);
+ ssa_value_set_type(load, type_deref(ssa_value_type(load)));
+ return load;
} break;
- case AstNode_UnaryExpression: {
- auto *ue = &expr->unary_expression;
+ case AstNode_UnaryExpr: {
+ auto *ue = &expr->unary_expr;
switch (ue->op.kind) {
case Token_Pointer:
- return ssa_lvalue_address(ssa_build_address(proc, ue->operand), proc);
+ return ssa_lvalue_address(ssa_build_address(proc, ue->expr), proc);
case Token_Add:
- return ssa_build_expression(proc, ue->operand);
+ return ssa_build_expr(proc, ue->expr);
case Token_Sub: {
- // NOTE(bill): -x == 0 - x
+ // NOTE(bill): -`x` == 0 - `x`
ExactValue zero = make_exact_value_integer(0);
ssaValue *left = ssa_make_value_constant(proc->module->allocator, tv->type, zero);
- ssaValue *right = ssa_build_expression(proc, ue->operand);
+ ssaValue *right = ssa_build_expr(proc, ue->expr);
return ssa_emit_arith(proc, ue->op, left, right, tv->type);
} break;
case Token_Xor: { // Bitwise not
- // NOTE(bill): "not" x == x "xor" -1
+ // NOTE(bill): "not" `x` == `x` "xor" `-1`
ExactValue neg_one = make_exact_value_integer(-1);
- ssaValue *left = ssa_build_expression(proc, ue->operand);
+ ssaValue *left = ssa_build_expr(proc, ue->expr);
ssaValue *right = ssa_make_value_constant(proc->module->allocator, tv->type, neg_one);
return ssa_emit_arith(proc, ue->op, left, right, tv->type);
} break;
@@ -641,8 +655,8 @@ ssaValue *ssa_build_single_expression(ssaProcedure *proc, AstNode *expr, TypeAnd
}
} break;
- case AstNode_BinaryExpression: {
- auto *be = &expr->binary_expression;
+ case AstNode_BinaryExpr: {
+ auto *be = &expr->binary_expr;
switch (be->op.kind) {
case Token_Add:
case Token_Sub:
@@ -653,17 +667,17 @@ ssaValue *ssa_build_single_expression(ssaProcedure *proc, AstNode *expr, TypeAnd
case Token_Or:
case Token_Xor:
return ssa_emit_arith(proc, be->op,
- ssa_build_expression(proc, be->left),
- ssa_build_expression(proc, be->right),
+ ssa_build_expr(proc, be->left),
+ ssa_build_expr(proc, be->right),
tv->type);
case Token_AndNot: {
- AstNode ue = {AstNode_UnaryExpression};
- ue.unary_expression.op = be->op;
- ue.unary_expression.op.kind = Token_Xor;
- ue.unary_expression.operand = be->right;
- ssaValue *left = ssa_build_expression(proc, be->left);
- ssaValue *right = ssa_build_expression(proc, &ue);
+ AstNode ue = {AstNode_UnaryExpr};
+ ue.unary_expr.op = be->op;
+ ue.unary_expr.op.kind = Token_Xor;
+ ue.unary_expr.expr = be->right;
+ ssaValue *left = ssa_build_expr(proc, be->left);
+ ssaValue *right = ssa_build_expr(proc, &ue);
Token op = be->op;
op.kind = Token_And;
return ssa_emit_arith(proc, op, left, right, tv->type);
@@ -676,8 +690,8 @@ ssaValue *ssa_build_single_expression(ssaProcedure *proc, AstNode *expr, TypeAnd
case Token_Gt:
case Token_GtEq: {
ssaValue *cmp = ssa_emit_compare(proc, be->op,
- ssa_build_expression(proc, be->left),
- ssa_build_expression(proc, be->right));
+ ssa_build_expr(proc, be->left),
+ ssa_build_expr(proc, be->right));
return ssa_emit_conversion(proc, cmp, default_type(tv->type));
} break;
@@ -685,18 +699,43 @@ ssaValue *ssa_build_single_expression(ssaProcedure *proc, AstNode *expr, TypeAnd
GB_PANIC("Invalid binary expression");
}
} break;
- case AstNode_ProcedureLiteral:
+ case AstNode_ProcLit:
break;
- case AstNode_CastExpression:
+ case AstNode_CastExpr:
break;
- case AstNode_CallExpression:
+ case AstNode_CallExpr:
break;
- case AstNode_SliceExpression:
+ case AstNode_SliceExpr:
break;
- case AstNode_IndexExpression: {
+ case AstNode_IndexExpr: {
+ auto *ie = &expr->index_expr;
+ Type *t = type_of_expr(proc->module->info, ie->expr);
+ t = get_base_type(t);
+ switch (t->kind) {
+ case Type_Basic: {
+ // TODO(bill): Strings AstNode_IndexExpression
+ } break;
+ case Type_Array: {
+ Type *t_int = &basic_types[Basic_int];
+ ssaValue *e = ssa_lvalue_address(ssa_build_address(proc, ie->expr), proc);
+ ssaValue *i0 = ssa_make_value_constant(proc->module->allocator, t_int, make_exact_value_integer(0));
+ ssaValue *i1 = ssa_emit_conversion(proc, ssa_build_expr(proc, ie->index), t_int);
+ ssaValue *gep = ssa_make_instruction_get_element_ptr(proc, e,
+ i0, i1, 2,
+ true);
+ ssa_value_set_type(gep, t->array.element);
+ return ssa_emit_load(proc, ssa_emit(proc, gep));
+ } break;
+
+ case Type_Slice:
+ break;
+
+ case Type_Pointer:
+ break;
+ }
} break;
- case AstNode_SelectorExpression:
+ case AstNode_SelectorExpr:
break;
}
@@ -705,8 +744,8 @@ ssaValue *ssa_build_single_expression(ssaProcedure *proc, AstNode *expr, TypeAnd
}
-ssaValue *ssa_build_expression(ssaProcedure *proc, AstNode *expr) {
- expr = unparen_expression(expr);
+ssaValue *ssa_build_expr(ssaProcedure *proc, AstNode *expr) {
+ expr = unparen_expr(expr);
TypeAndValue *tv = map_get(&proc->module->info->types, hash_pointer(expr));
if (tv) {
@@ -723,7 +762,7 @@ ssaValue *ssa_build_expression(ssaProcedure *proc, AstNode *expr) {
gb_printf("!Addressable!\n");
// TODO(bill): Addressing_Variable
} else {
- value = ssa_build_single_expression(proc, expr, tv);
+ value = ssa_build_single_expr(proc, expr, tv);
}
return value;
@@ -734,9 +773,9 @@ ssaValue *ssa_build_expression(ssaProcedure *proc, AstNode *expr) {
ssaLvalue ssa_build_address(ssaProcedure *proc, AstNode *expr) {
switch (expr->kind) {
- case AstNode_Identifier: {
+ case AstNode_Ident: {
if (!ssa_is_blank_identifier(expr)) {
- Entity *e = entity_of_identifier(proc->module->info, expr);
+ Entity *e = entity_of_ident(proc->module->info, expr);
ssaLvalue val = {ssaLvalue_Address};
val.address.expr = expr;
@@ -748,22 +787,65 @@ ssaLvalue ssa_build_address(ssaProcedure *proc, AstNode *expr) {
}
} break;
- case AstNode_ParenExpression:
- return ssa_build_address(proc, unparen_expression(expr));
+ case AstNode_ParenExpr:
+ return ssa_build_address(proc, unparen_expr(expr));
+
+/*
+ ssaLvalue addr = ssa_build_address(proc, expr->dereference_expr.operand);
+ ssaValue *load = ssa_lvalue_load(addr, proc);
+ ssaValue *deref = ssa_emit_load(proc, load);
+ ssa_value_set_type(deref, type_deref(ssa_value_type(deref)));
+ return deref;
+*/
+
+#if 1
+ case AstNode_DerefExpr: {
+ AstNode *operand = expr->deref_expr.expr;
+ ssaLvalue addr = ssa_build_address(proc, operand);
+ ssaValue *value = ssa_lvalue_load(addr, proc);
- case AstNode_DereferenceExpression: {
ssaLvalue val = {ssaLvalue_Address};
- AstNode *operand = expr->dereference_expression.operand;
- val.address.value = ssa_build_expression(proc, operand);
+ val.address.value = value;
val.address.expr = expr;
return val;
} break;
+#endif
- case AstNode_SelectorExpression:
+ case AstNode_SelectorExpr:
break;
- case AstNode_IndexExpression:
- break;
+ case AstNode_IndexExpr: {
+ ssaValue *v = NULL;
+ Type *element_type = NULL;
+ auto *ie = &expr->index_expr;
+ Type *t = type_of_expr(proc->module->info, expr->index_expr.expr);
+ t = get_base_type(t);
+ switch (t->kind) {
+ case Type_Array: {
+ Type *t_int = &basic_types[Basic_int];
+ ssaValue *e = ssa_lvalue_address(ssa_build_address(proc, ie->expr), proc);
+ ssaValue *i0 = ssa_make_value_constant(proc->module->allocator, t_int, make_exact_value_integer(0));
+ ssaValue *i1 = ssa_emit_conversion(proc, ssa_build_expr(proc, ie->index), t_int);
+ ssaValue *gep = ssa_make_instruction_get_element_ptr(proc, e,
+ i0, i1, 2,
+ true);
+ element_type = t->array.element;
+ v = gep;
+ } break;
+ case Type_Pointer:
+ GB_PANIC("ssa_build_address AstNode_IndexExpression Type_Slice");
+ break;
+ case Type_Slice:
+ GB_PANIC("ssa_build_address AstNode_IndexExpression Type_Slice");
+ break;
+ }
+
+ ssa_value_set_type(v, element_type);
+ ssaLvalue val = {ssaLvalue_Address};
+ val.address.value = ssa_emit(proc, v);
+ val.address.expr = expr;
+ return val;
+ } break;
// TODO(bill): Others address
}
@@ -782,19 +864,19 @@ void ssa_build_assign_op(ssaProcedure *proc, ssaLvalue lhs, ssaValue *value, Tok
}
-void ssa_build_statement(ssaProcedure *proc, AstNode *s);
+void ssa_build_stmt(ssaProcedure *proc, AstNode *s);
-void ssa_build_statement_list(ssaProcedure *proc, AstNode *list) {
+void ssa_build_stmt_list(ssaProcedure *proc, AstNode *list) {
for (AstNode *stmt = list ; stmt != NULL; stmt = stmt->next)
- ssa_build_statement(proc, stmt);
+ ssa_build_stmt(proc, stmt);
}
-void ssa_build_statement(ssaProcedure *proc, AstNode *s) {
+void ssa_build_stmt(ssaProcedure *proc, AstNode *s) {
switch (s->kind) {
- case AstNode_EmptyStatement:
+ case AstNode_EmptyStmt:
break;
- case AstNode_VariableDeclaration: {
- auto *vd = &s->variable_declaration;
+ case AstNode_VarDecl: {
+ auto *vd = &s->var_decl;
if (vd->kind == Declaration_Mutable) {
if (vd->name_count == vd->value_count) { // 1:1 assigment
gbArray(ssaLvalue) lvals;
@@ -815,7 +897,7 @@ void ssa_build_statement(ssaProcedure *proc, AstNode *s) {
}
for (AstNode *value = vd->value_list; value != NULL; value = value->next) {
- ssaValue *init = ssa_build_expression(proc, value);
+ ssaValue *init = ssa_build_expr(proc, value);
gb_array_append(inits, init);
}
@@ -837,22 +919,22 @@ void ssa_build_statement(ssaProcedure *proc, AstNode *s) {
}
} break;
- case AstNode_IncDecStatement: {
- Token op = s->inc_dec_statement.op;
+ case AstNode_IncDecStmt: {
+ Token op = s->inc_dec_stmt.op;
if (op.kind == Token_Increment) {
op.kind = Token_Add;
} else if (op.kind == Token_Decrement) {
op.kind = Token_Sub;
}
- ssaLvalue lval = ssa_build_address(proc, s->inc_dec_statement.expression);
+ ssaLvalue lval = ssa_build_address(proc, s->inc_dec_stmt.expr);
ssaValue *one = ssa_make_value_constant(proc->module->allocator, ssa_lvalue_type(lval),
make_exact_value_integer(1));
ssa_build_assign_op(proc, lval, one, op);
} break;
- case AstNode_AssignStatement: {
- auto *assign = &s->assign_statement;
+ case AstNode_AssignStmt: {
+ auto *assign = &s->assign_stmt;
switch (assign->op.kind) {
case Token_Eq: {
gbArray(ssaLvalue) lvals;
@@ -873,7 +955,7 @@ void ssa_build_statement(ssaProcedure *proc, AstNode *s) {
if (assign->lhs_count == 1) {
AstNode *lhs = assign->lhs_list;
AstNode *rhs = assign->rhs_list;
- ssaValue *init = ssa_build_expression(proc, rhs);
+ ssaValue *init = ssa_build_expr(proc, rhs);
ssa_lvalue_store(lvals[0], proc, init);
} else {
gbArray(ssaValue *) inits;
@@ -881,7 +963,7 @@ void ssa_build_statement(ssaProcedure *proc, AstNode *s) {
defer (gb_array_free(inits));
for (AstNode *rhs = assign->rhs_list; rhs != NULL; rhs = rhs->next) {
- ssaValue *init = ssa_build_expression(proc, rhs);
+ ssaValue *init = ssa_build_expr(proc, rhs);
gb_array_append(inits, init);
}
@@ -903,33 +985,33 @@ void ssa_build_statement(ssaProcedure *proc, AstNode *s) {
kind += Token_Add - Token_AddEq; // Convert += to +
op.kind = cast(TokenKind)kind;
ssaLvalue lhs = ssa_build_address(proc, assign->lhs_list);
- ssaValue *value = ssa_build_expression(proc, assign->rhs_list);
+ ssaValue *value = ssa_build_expr(proc, assign->rhs_list);
ssa_build_assign_op(proc, lhs, value, op);
} break;
}
} break;
- case AstNode_ExpressionStatement:
- ssa_build_expression(proc, s->expression_statement.expression);
+ case AstNode_ExprStmt:
+ ssa_build_expr(proc, s->expr_stmt.expr);
break;
- case AstNode_BlockStatement:
- ssa_build_statement_list(proc, s->block_statement.list);
+ case AstNode_BlockStmt:
+ ssa_build_stmt_list(proc, s->block_stmt.list);
break;
- case AstNode_IfStatement:
+ case AstNode_IfStmt:
GB_PANIC("AstNode_IfStatement");
break;
- case AstNode_ReturnStatement:
+ case AstNode_ReturnStmt:
GB_PANIC("AstNode_ReturnStatement");
break;
- case AstNode_ForStatement:
+ case AstNode_ForStmt:
GB_PANIC("AstNode_ForStatement");
break;
- case AstNode_DeferStatement:
+ case AstNode_DeferStmt:
GB_PANIC("AstNode_DeferStatement");
break;
- case AstNode_BranchStatement:
+ case AstNode_BranchStmt:
GB_PANIC("AstNode_BranchStatement");
break;
}
@@ -945,9 +1027,9 @@ void ssa_build_procedure(ssaValue *value) {
AstNode *proc_decl = proc->decl->proc_decl;
switch (proc_decl->kind) {
- case AstNode_ProcedureDeclaration:
- proc->type_expr = proc_decl->procedure_declaration.type;
- proc->body = proc_decl->procedure_declaration.body;
+ case AstNode_ProcDecl:
+ proc->type_expr = proc_decl->proc_decl.type;
+ proc->body = proc_decl->proc_decl.body;
break;
default:
return;
@@ -960,7 +1042,7 @@ void ssa_build_procedure(ssaValue *value) {
ssa_begin_procedure_body(proc);
- ssa_build_statement(proc, proc->body);
+ ssa_build_stmt(proc, proc->body);
ssa_end_procedure_body(proc);
}