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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 49/56] tcg/optimize: Use fold_xi_to_x for mul
Date: Wed, 27 Oct 2021 19:41:24 -0700
Message-Id: <20211028024131.1492790-50-richard.henderson@linaro.org>
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Cc: Luis Pires <luis.pires@eldorado.org.br>,
=?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <f4bug@amsat.org>
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Recognize the identity function for low-part multiply.
Suggested-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daud=C3=A9 <f4bug@amsat.org>
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 6d795954f2..907049fb06 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1461,7 +1461,8 @@ 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;
--=20
2.25.1