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tcg/optimize: Optimize sign extensions
authorRichard Henderson <richard.henderson@linaro.org>
Thu, 26 Aug 2021 19:04:46 +0000 (12:04 -0700)
committerRichard Henderson <richard.henderson@linaro.org>
Fri, 29 Oct 2021 03:55:07 +0000 (20:55 -0700)
commit57fe5c6df21c05af11435b2ed426a42ee3345298
treead89dde9ce08308cdc99f128fd71fc7e2f25286atree | snapshot
parent267c17e8252fd70b311871f3e936eb7cdf4abb51commit | diff
tcg/optimize: Optimize sign extensions

Certain targets, like riscv, produce signed 32-bit results.
This can lead to lots of redundant extensions as values are
manipulated.

Begin by tracking only the obvious sign-extensions, and
converting them to simple copies when possible.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
tcg/optimize.c diff | blob | history
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