[Bug target/85038] x32: unnecessary address-size prefix when a pointer register is already zero-extended

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85038 --- Comment #2 from Andrew Pinski --- Note on some aarch64 micro-arch, the zero extend does not take up an issue slot and is removed in the pipeline before issue. So it might be less than an issue about the zero extend there except for cache

[Bug target/85038] x32: unnecessary address-size prefix when a pointer register is already zero-extended

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85038 --- Comment #1 from Peter Cordes --- Correction for AArch64: it supports addressing modes with a 64-bit base register + 32-bit index register with zero or sign extension for the 32-bit index. But not 32-bit base registers. As a hack that's