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authorRichard Henderson <richard.henderson@linaro.org>2025-01-14 23:08:24 -0800
committerRichard Henderson <richard.henderson@linaro.org>2025-04-28 13:40:17 -0700
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tcg/optimize: With two const operands, prefer 0 in arg1
For most binary operands, two const operands fold.
However, the add/sub carry opcodes have a third input.
Prefer "reg, zero, const" since many risc hosts have a
zero register that can fit a "reg, reg, const" insn format.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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