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select to phi in if expression

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This commit is contained in:
Ginger Bill
2016-12-30 16:31:04 +00:00
parent 2ecafda1d3
commit 6748f305db
1 changed files with 8 additions and 5 deletions
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src/ssa.c
+8 -5
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@@ -2654,6 +2654,9 @@ ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue
ssa_build_stmt(proc, ie->init);
}
ssaValueArray edges = {0};
array_init_reserve(&edges, proc->module->allocator, 2);
GB_ASSERT(ie->else_expr != NULL);
ssaBlock *then = ssa_add_block(proc, expr, "if.then");
ssaBlock *done = ssa_add_block(proc, expr, "if.done"); // NOTE(bill): Append later
@@ -2662,24 +2665,24 @@ ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue
ssaValue *cond = ssa_build_cond(proc, ie->cond, then, else_);
proc->curr_block = then;
ssaValue *iv = NULL;
ssaValue *ev = NULL;
ssa_open_scope(proc);
iv = ssa_build_expr(proc, ie->body);
array_add(&edges, ssa_build_expr(proc, ie->body));
ssa_close_scope(proc, ssaDeferExit_Default, NULL);
ssa_emit_jump(proc, done);
proc->curr_block = else_;
ssa_open_scope(proc);
ev = ssa_build_expr(proc, ie->else_expr);
array_add(&edges, ssa_build_expr(proc, ie->else_expr));
ssa_close_scope(proc, ssaDeferExit_Default, NULL);
ssa_emit_jump(proc, done);
proc->curr_block = done;
return ssa_emit_select(proc, cond, iv, ev);
Type *type = type_of_expr(proc->module->info, expr);
return ssa_emit(proc, ssa_make_instr_phi(proc, edges, type));
case_end;
case_ast_node(ge, GiveExpr, expr);