* [committed] tree-ssa-math-opts: correct -ffp-contract= check
@ 2023-05-17 18:43 Alexander Monakov
2023-05-18 6:15 ` Richard Biener
0 siblings, 1 reply; 2+ messages in thread
From: Alexander Monakov @ 2023-05-17 18:43 UTC (permalink / raw)
To: gcc-patches; +Cc: Alexander Monakov
Since tree-ssa-math-opts may freely contract across statement boundaries
we should enable it only for -ffp-contract=fast instead of disabling it
for -ffp-contract=off.
No functional change, since -ffp-contract=on is not exposed yet.
gcc/ChangeLog:
* tree-ssa-math-opts.cc (convert_mult_to_fma): Enable only for
FP_CONTRACT_FAST (no functional change).
---
Preapproved in PR 106092, pushed to trunk.
gcc/tree-ssa-math-opts.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/tree-ssa-math-opts.cc b/gcc/tree-ssa-math-opts.cc
index b58a2ac9e6..d71c51dc0e 100644
--- a/gcc/tree-ssa-math-opts.cc
+++ b/gcc/tree-ssa-math-opts.cc
@@ -3320,7 +3320,7 @@ convert_mult_to_fma (gimple *mul_stmt, tree op1, tree op2,
imm_use_iterator imm_iter;
if (FLOAT_TYPE_P (type)
- && flag_fp_contract_mode == FP_CONTRACT_OFF)
+ && flag_fp_contract_mode != FP_CONTRACT_FAST)
return false;
/* We don't want to do bitfield reduction ops. */
--
2.39.2
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [committed] tree-ssa-math-opts: correct -ffp-contract= check
2023-05-17 18:43 [committed] tree-ssa-math-opts: correct -ffp-contract= check Alexander Monakov
@ 2023-05-18 6:15 ` Richard Biener
0 siblings, 0 replies; 2+ messages in thread
From: Richard Biener @ 2023-05-18 6:15 UTC (permalink / raw)
To: Alexander Monakov; +Cc: gcc-patches
On Wed, May 17, 2023 at 8:44 PM Alexander Monakov via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
>
> Since tree-ssa-math-opts may freely contract across statement boundaries
> we should enable it only for -ffp-contract=fast instead of disabling it
> for -ffp-contract=off.
>
> No functional change, since -ffp-contract=on is not exposed yet.
OK.
> gcc/ChangeLog:
>
> * tree-ssa-math-opts.cc (convert_mult_to_fma): Enable only for
> FP_CONTRACT_FAST (no functional change).
> ---
>
> Preapproved in PR 106092, pushed to trunk.
>
> gcc/tree-ssa-math-opts.cc | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/gcc/tree-ssa-math-opts.cc b/gcc/tree-ssa-math-opts.cc
> index b58a2ac9e6..d71c51dc0e 100644
> --- a/gcc/tree-ssa-math-opts.cc
> +++ b/gcc/tree-ssa-math-opts.cc
> @@ -3320,7 +3320,7 @@ convert_mult_to_fma (gimple *mul_stmt, tree op1, tree op2,
> imm_use_iterator imm_iter;
>
> if (FLOAT_TYPE_P (type)
> - && flag_fp_contract_mode == FP_CONTRACT_OFF)
> + && flag_fp_contract_mode != FP_CONTRACT_FAST)
> return false;
>
> /* We don't want to do bitfield reduction ops. */
> --
> 2.39.2
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-05-17 18:43 [committed] tree-ssa-math-opts: correct -ffp-contract= check Alexander Monakov
2023-05-18 6:15 ` Richard Biener
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