[Bug target/115875] -Oz optimization of "push IMM; pop REG" is used incorrectly for 64-bit constants with 31th bit set

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115875 --- Comment #2 from Denis Vlasenko --- 0xUL works, although it uses b8 ff ff ff ff mov$0x,%eax instead of 83 c8 ffor $0x,%eax

[Bug c/115875] New: -Oz optimization of "push IMM; pop REG" is used incorrectly for 64-bit constants with 31th bit set

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115875 Bug ID: 115875 Summary: -Oz optimization of "push IMM; pop REG" is used incorrectly for 64-bit constants with 31th bit set Product: gcc Version: 14.0 Status: UNCONFIRMED

[Bug target/100320] [8/9/10/11/12 Regression] 32-bit x86 memcpy is suboptimal

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100320 --- Comment #2 from Denis Vlasenko --- The relevant code in current git seems to be: static void expand_set_or_cpymem_via_rep (rtx destmem, rtx srcmem, rtx destptr, rtx srcptr, rtx value, rtx orig_value,

[Bug c/100320] New: regression: 32-bit x86 memcpy is suboptimal

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100320 Bug ID: 100320 Summary: regression: 32-bit x86 memcpy is suboptimal Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c