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| author | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2020-09-05 11:55:15 +0200 |
|---|---|---|
| committer | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2020-09-07 00:57:44 +0200 |
| commit | 814cda15f647c14e0892deef3c57d73417e87b34 (patch) | |
| tree | 1012b03f192acc772217ab325d161a30211c843b /linearize.c | |
| parent | 5c86c487ea5e3c6d4a56d7c98b39e33b6b4a28f5 (diff) | |
| download | sparse-dev-814cda15f647c14e0892deef3c57d73417e87b34.tar.gz | |
builtin: teach sparse to linearize __builtin_fma()
The support for the linearization of builtins was already
added for __builtin_unreachable() but this builtin has
no arguments and no return value.
So, to complete the experience of builtin linearization,
add the linearization of __builtin_fma().
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Diffstat (limited to 'linearize.c')
| -rw-r--r-- | linearize.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/linearize.c b/linearize.c index 3690f2e7..1081bda8 100644 --- a/linearize.c +++ b/linearize.c @@ -2585,6 +2585,23 @@ struct entrypoint *linearize_symbol(struct symbol *sym) * Builtin functions */ +static pseudo_t linearize_fma(struct entrypoint *ep, struct expression *expr) +{ + struct instruction *insn = alloc_typed_instruction(OP_FMADD, expr->ctype); + struct expression *arg; + + PREPARE_PTR_LIST(expr->args, arg); + insn->src1 = linearize_expression(ep, arg); + NEXT_PTR_LIST(arg) + insn->src2 = linearize_expression(ep, arg); + NEXT_PTR_LIST(arg) + insn->src3 = linearize_expression(ep, arg); + FINISH_PTR_LIST(arg); + + add_one_insn(ep, insn); + return insn->target = alloc_pseudo(insn); +} + static pseudo_t linearize_unreachable(struct entrypoint *ep, struct expression *exp) { add_unreachable(ep); @@ -2597,6 +2614,9 @@ static struct sym_init { struct symbol_op op; } builtins_table[] = { // must be declared in builtin.c:declare_builtins[] + { "__builtin_fma", linearize_fma }, + { "__builtin_fmaf", linearize_fma }, + { "__builtin_fmal", linearize_fma }, { "__builtin_unreachable", linearize_unreachable }, { } }; |