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[PULL v2 51/60] tcg/optimize: Use fold_xi_to_x for div
From: |
Richard Henderson |
Subject: |
[PULL v2 51/60] tcg/optimize: Use fold_xi_to_x for div |
Date: |
Thu, 28 Oct 2021 21:33:20 -0700 |
Recognize the identity function for division.
Suggested-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/optimize.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 907049fb06..f8b0709157 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1218,7 +1218,11 @@ static bool fold_deposit(OptContext *ctx, TCGOp *op)
static bool fold_divide(OptContext *ctx, TCGOp *op)
{
- return fold_const2(ctx, op);
+ if (fold_const2(ctx, op) ||
+ fold_xi_to_x(ctx, op, 1)) {
+ return true;
+ }
+ return false;
}
static bool fold_dup(OptContext *ctx, TCGOp *op)
--
2.25.1
- [PULL v2 40/60] tcg/optimize: Split out fold_sub_to_neg, (continued)
- [PULL v2 40/60] tcg/optimize: Split out fold_sub_to_neg, Richard Henderson, 2021/10/29
- [PULL v2 41/60] tcg/optimize: Split out fold_xi_to_x, Richard Henderson, 2021/10/29
- [PULL v2 42/60] tcg/optimize: Split out fold_ix_to_i, Richard Henderson, 2021/10/29
- [PULL v2 43/60] tcg/optimize: Split out fold_masks, Richard Henderson, 2021/10/29
- [PULL v2 45/60] tcg/optimize: Expand fold_addsub2_i32 to 64-bit ops, Richard Henderson, 2021/10/29
- [PULL v2 48/60] tcg/optimize: Stop forcing z_mask to "garbage" for 32-bit values, Richard Henderson, 2021/10/29
- [PULL v2 60/60] softmmu: fix for "after access" watchpoints, Richard Henderson, 2021/10/29
- [PULL v2 44/60] tcg/optimize: Expand fold_mulu2_i32 to all 4-arg multiplies, Richard Henderson, 2021/10/29
- [PULL v2 47/60] tcg: Extend call args using the correct opcodes, Richard Henderson, 2021/10/29
- [PULL v2 46/60] tcg/optimize: Sink commutative operand swapping into fold functions, Richard Henderson, 2021/10/29
- [PULL v2 51/60] tcg/optimize: Use fold_xi_to_x for div,
Richard Henderson <=
- [PULL v2 52/60] tcg/optimize: Use fold_xx_to_i for rem, Richard Henderson, 2021/10/29
- [PULL v2 55/60] tcg/optimize: Propagate sign info for setcond, Richard Henderson, 2021/10/29
- [PULL v2 54/60] tcg/optimize: Propagate sign info for logical operations, Richard Henderson, 2021/10/29
- [PULL v2 58/60] softmmu: fix watchpoint processing in icount mode, Richard Henderson, 2021/10/29
- [PULL v2 50/60] tcg/optimize: Use fold_xi_to_x for mul, Richard Henderson, 2021/10/29
- [PULL v2 53/60] tcg/optimize: Optimize sign extensions, Richard Henderson, 2021/10/29
- [PULL v2 49/60] tcg/optimize: Use fold_xx_to_i for orc, Richard Henderson, 2021/10/29
- [PULL v2 57/60] tcg/optimize: Propagate sign info for shifting, Richard Henderson, 2021/10/29
- [PULL v2 56/60] tcg/optimize: Propagate sign info for bit counting, Richard Henderson, 2021/10/29
- [PULL v2 59/60] softmmu: remove useless condition in watchpoint check, Richard Henderson, 2021/10/29