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[PATCH v4 44/51] tcg/optimize: Use fold_xi_to_x for mul
From: |
Richard Henderson |
Subject: |
[PATCH v4 44/51] tcg/optimize: Use fold_xi_to_x for mul |
Date: |
Tue, 26 Oct 2021 16:09:36 -0700 |
Recognize the identity function for low-part multiply.
Suggested-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/optimize.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index bea82305db..fe2b1eb18e 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1460,7 +1460,8 @@ static bool fold_movcond(OptContext *ctx, TCGOp *op)
static bool fold_mul(OptContext *ctx, TCGOp *op)
{
if (fold_const2(ctx, op) ||
- fold_xi_to_i(ctx, op, 0)) {
+ fold_xi_to_i(ctx, op, 0) ||
+ fold_xi_to_x(ctx, op, 1)) {
return true;
}
return false;
--
2.25.1
- RE: [PATCH v4 38/51] tcg/optimize: Split out fold_masks, (continued)
- [PATCH v4 32/51] tcg/optimize: Split out fold_xi_to_i, Richard Henderson, 2021/10/26
- [PATCH v4 36/51] tcg/optimize: Split out fold_xi_to_x, Richard Henderson, 2021/10/26
- [PATCH v4 41/51] tcg/optimize: Sink commutative operand swapping into fold functions, Richard Henderson, 2021/10/26
- [PATCH v4 40/51] tcg/optimize: Expand fold_addsub2_i32 to 64-bit ops, Richard Henderson, 2021/10/26
- [PATCH v4 44/51] tcg/optimize: Use fold_xi_to_x for mul,
Richard Henderson <=
- [PATCH v4 46/51] tcg/optimize: Use fold_xx_to_i for rem, Richard Henderson, 2021/10/26
- [PATCH v4 47/51] tcg/optimize: Optimize sign extensions, Richard Henderson, 2021/10/26
- [PATCH v4 50/51] tcg/optimize: Propagate sign info for bit counting, Richard Henderson, 2021/10/26