From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: luis.pires@eldorado.org.br, alex.bennee@linaro.org,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>
Subject: [PATCH v3 31/48] tcg/optimize: Split out fold_xx_to_x
Date: Thu, 21 Oct 2021 14:05:22 -0700 [thread overview]
Message-ID: <20211021210539.825582-32-richard.henderson@linaro.org> (raw)
In-Reply-To: <20211021210539.825582-1-richard.henderson@linaro.org>
Pull the "op r, a, a => mov r, a" optimization into a function,
and use it in the outer opcode fold functions.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/optimize.c | 39 ++++++++++++++++++++++++---------------
1 file changed, 24 insertions(+), 15 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 5ac7a45597..8dfe8694da 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -704,8 +704,22 @@ static bool fold_xx_to_i(OptContext *ctx, TCGOp *op, uint64_t i)
return false;
}
+/* If the binary operation has both arguments equal, fold to identity. */
+static bool fold_xx_to_x(OptContext *ctx, TCGOp *op)
+{
+ if (args_are_copies(op->args[1], op->args[2])) {
+ return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[1]);
+ }
+ return false;
+}
+
/*
* These outermost fold_<op> functions are sorted alphabetically.
+ *
+ * The ordering of the transformations should be:
+ * 1) those that produce a constant
+ * 2) those that produce a copy
+ * 3) those that produce information about the result value.
*/
static bool fold_add(OptContext *ctx, TCGOp *op)
@@ -748,7 +762,11 @@ static bool fold_add2_i32(OptContext *ctx, TCGOp *op)
static bool fold_and(OptContext *ctx, TCGOp *op)
{
- return fold_const2(ctx, op);
+ if (fold_const2(ctx, op) ||
+ fold_xx_to_x(ctx, op)) {
+ return true;
+ }
+ return false;
}
static bool fold_andc(OptContext *ctx, TCGOp *op)
@@ -1101,7 +1119,11 @@ static bool fold_not(OptContext *ctx, TCGOp *op)
static bool fold_or(OptContext *ctx, TCGOp *op)
{
- return fold_const2(ctx, op);
+ if (fold_const2(ctx, op) ||
+ fold_xx_to_x(ctx, op)) {
+ return true;
+ }
+ return false;
}
static bool fold_orc(OptContext *ctx, TCGOp *op)
@@ -1732,19 +1754,6 @@ void tcg_optimize(TCGContext *s)
break;
}
- /* Simplify expression for "op r, a, a => mov r, a" cases */
- switch (opc) {
- CASE_OP_32_64_VEC(or):
- CASE_OP_32_64_VEC(and):
- if (args_are_copies(op->args[1], op->args[2])) {
- tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[1]);
- continue;
- }
- break;
- default:
- break;
- }
-
/*
* Process each opcode.
* Sorted alphabetically by opcode as much as possible.
--
2.25.1
next prev parent reply other threads:[~2021-10-21 21:31 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 21:04 [PATCH v3 00/48] tcg: optimize redundant sign extensions Richard Henderson
2021-10-21 21:04 ` [PATCH v3 01/48] tcg/optimize: Rename "mask" to "z_mask" Richard Henderson
2021-10-21 21:04 ` [PATCH v3 02/48] tcg/optimize: Split out OptContext Richard Henderson
2021-10-22 14:53 ` Philippe Mathieu-Daudé
2021-10-21 21:04 ` [PATCH v3 03/48] tcg/optimize: Remove do_default label Richard Henderson
2021-10-22 15:12 ` Philippe Mathieu-Daudé
2021-10-21 21:04 ` [PATCH v3 04/48] tcg/optimize: Change tcg_opt_gen_{mov, movi} interface Richard Henderson
2021-10-21 21:04 ` [PATCH v3 05/48] tcg/optimize: Move prev_mb into OptContext Richard Henderson
2021-10-22 15:13 ` Philippe Mathieu-Daudé
2021-10-21 21:04 ` [PATCH v3 06/48] tcg/optimize: Split out init_arguments Richard Henderson
2021-10-21 21:04 ` [PATCH v3 07/48] tcg/optimize: Split out copy_propagate Richard Henderson
2021-10-21 21:04 ` [PATCH v3 08/48] tcg/optimize: Split out fold_call Richard Henderson
2021-10-21 21:05 ` [PATCH v3 09/48] tcg/optimize: Drop nb_oargs, nb_iargs locals Richard Henderson
2021-10-21 21:05 ` [PATCH v3 10/48] tcg/optimize: Change fail return for do_constant_folding_cond* Richard Henderson
2021-10-22 13:53 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 11/48] tcg/optimize: Return true from tcg_opt_gen_{mov, movi} Richard Henderson
2021-10-26 15:13 ` [PATCH v3 11/48] tcg/optimize: Return true from tcg_opt_gen_{mov,movi} Alex Bennée
2021-10-21 21:05 ` [PATCH v3 12/48] tcg/optimize: Split out finish_folding Richard Henderson
2021-10-26 15:16 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 13/48] tcg/optimize: Use a boolean to avoid a mass of continues Richard Henderson
2021-10-26 15:17 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 14/48] tcg/optimize: Split out fold_mb, fold_qemu_{ld,st} Richard Henderson
2021-10-22 13:56 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 15/48] tcg/optimize: Split out fold_const{1,2} Richard Henderson
2021-10-26 15:19 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 16/48] tcg/optimize: Split out fold_setcond2 Richard Henderson
2021-10-26 15:31 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 17/48] tcg/optimize: Split out fold_brcond2 Richard Henderson
2021-10-22 17:26 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 18/48] tcg/optimize: Split out fold_brcond Richard Henderson
2021-10-22 13:58 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 19/48] tcg/optimize: Split out fold_setcond Richard Henderson
2021-10-22 13:59 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 20/48] tcg/optimize: Split out fold_mulu2_i32 Richard Henderson
2021-10-22 14:00 ` Philippe Mathieu-Daudé
2021-10-22 17:32 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 21/48] tcg/optimize: Split out fold_addsub2_i32 Richard Henderson
2021-10-22 14:01 ` Philippe Mathieu-Daudé
2021-10-22 17:33 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 22/48] tcg/optimize: Split out fold_movcond Richard Henderson
2021-10-22 14:05 ` Philippe Mathieu-Daudé
2021-10-22 17:34 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 23/48] tcg/optimize: Split out fold_extract2 Richard Henderson
2021-10-22 14:07 ` Philippe Mathieu-Daudé
2021-10-22 17:34 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 24/48] tcg/optimize: Split out fold_extract, fold_sextract Richard Henderson
2021-10-22 14:08 ` Philippe Mathieu-Daudé
2021-10-22 17:34 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 25/48] tcg/optimize: Split out fold_deposit Richard Henderson
2021-10-22 14:09 ` Philippe Mathieu-Daudé
2021-10-22 17:35 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 26/48] tcg/optimize: Split out fold_count_zeros Richard Henderson
2021-10-22 14:10 ` Philippe Mathieu-Daudé
2021-10-22 17:35 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 27/48] tcg/optimize: Split out fold_bswap Richard Henderson
2021-10-22 17:36 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 28/48] tcg/optimize: Split out fold_dup, fold_dup2 Richard Henderson
2021-10-22 14:12 ` Philippe Mathieu-Daudé
2021-10-22 17:36 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 29/48] tcg/optimize: Split out fold_mov Richard Henderson
2021-10-22 17:39 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 30/48] tcg/optimize: Split out fold_xx_to_i Richard Henderson
2021-10-22 21:04 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` Richard Henderson [this message]
2021-10-22 21:04 ` [PATCH v3 31/48] tcg/optimize: Split out fold_xx_to_x Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 32/48] tcg/optimize: Split out fold_xi_to_i Richard Henderson
2021-10-22 21:17 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 33/48] tcg/optimize: Add type to OptContext Richard Henderson
2021-10-22 22:11 ` Luis Fernando Fujita Pires
2021-10-23 18:25 ` Richard Henderson
2021-10-21 21:05 ` [PATCH v3 34/48] tcg/optimize: Split out fold_to_not Richard Henderson
2021-10-25 14:17 ` Luis Fernando Fujita Pires
2021-10-25 17:31 ` Richard Henderson
2021-10-25 18:13 ` Luis Fernando Fujita Pires
2021-10-25 18:35 ` Richard Henderson
2021-10-21 21:05 ` [PATCH v3 35/48] tcg/optimize: Split out fold_sub_to_neg Richard Henderson
2021-10-25 14:17 ` Luis Fernando Fujita Pires
2021-10-21 21:05 ` [PATCH v3 36/48] tcg/optimize: Split out fold_xi_to_x Richard Henderson
2021-10-25 14:26 ` Luis Fernando Fujita Pires
2021-10-25 17:46 ` Richard Henderson
2021-10-21 21:05 ` [PATCH v3 37/48] tcg/optimize: Split out fold_ix_to_i Richard Henderson
2021-10-25 14:26 ` Luis Fernando Fujita Pires
2021-10-26 19:11 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 38/48] tcg/optimize: Split out fold_masks Richard Henderson
2021-10-26 15:32 ` Alex Bennée
2021-10-26 18:50 ` Richard Henderson
2021-10-21 21:05 ` [PATCH v3 39/48] tcg/optimize: Expand fold_mulu2_i32 to all 4-arg multiplies Richard Henderson
2021-10-22 14:16 ` Philippe Mathieu-Daudé
2021-10-21 21:05 ` [PATCH v3 40/48] tcg/optimize: Expand fold_addsub2_i32 to 64-bit ops Richard Henderson
2021-10-26 16:21 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 41/48] tcg/optimize: Sink commutative operand swapping into fold functions Richard Henderson
2021-10-26 16:27 ` Alex Bennée
2021-10-26 19:33 ` Richard Henderson
2021-10-27 13:22 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 42/48] tcg/optimize: Add more simplifications for orc Richard Henderson
2021-10-26 16:22 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 43/48] tcg/optimize: Stop forcing z_mask to "garbage" for 32-bit values Richard Henderson
2021-10-26 16:35 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 44/48] tcg/optimize: Optimize sign extensions Richard Henderson
2021-10-26 16:34 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 45/48] tcg/optimize: Propagate sign info for logical operations Richard Henderson
2021-10-26 16:35 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 46/48] tcg/optimize: Propagate sign info for setcond Richard Henderson
2021-10-26 16:36 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 47/48] tcg/optimize: Propagate sign info for bit counting Richard Henderson
2021-10-26 16:36 ` Alex Bennée
2021-10-21 21:05 ` [PATCH v3 48/48] tcg/optimize: Propagate sign info for shifting Richard Henderson
2021-10-26 16:37 ` Alex Bennée
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