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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 50/56] tcg/optimize: Use fold_xi_to_x for div
Date: Wed, 27 Oct 2021 19:41:25 -0700
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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 division.
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 | 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)
=20
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;
}
=20
static bool fold_dup(OptContext *ctx, TCGOp *op)
--=20
2.25.1