[Bug target/111755] The built-in memset function in GCC inadvertently generates code like "vst1.8 {d8-d9}, [sp:64]", which assumes an 8-byte alignment on the stack pointer $sp, leading to alignment vi

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111755

Andrew Pinski  changed:

   What|Removed |Added

 Status|WAITING |RESOLVED
 Resolution|--- |INVALID

--- Comment #5 from Andrew Pinski  ---
.

[Bug target/111755] The built-in memset function in GCC inadvertently generates code like "vst1.8 {d8-d9}, [sp:64]", which assumes an 8-byte alignment on the stack pointer $sp, leading to alignment vi

[kuzume at axell dot co.jp via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111755

--- Comment #4 from kuzume  ---
I apologize, but I will retract this report. I've realized that the IRQ handler
call of a certain RTOS I'm using is invoking with $sp as a multiple of 4, not
8. This violates the ARM ABI convention.

[Bug target/111755] The built-in memset function in GCC inadvertently generates code like "vst1.8 {d8-d9}, [sp:64]", which assumes an 8-byte alignment on the stack pointer $sp, leading to alignment vi

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111755

--- Comment #3 from Andrew Pinski  ---
The ARM EABI says the stack is always aligned to 8 byte so unless you change
GCC to be do this, this is exacted and the incoming stack needs to be aligned
correctly.

[Bug target/111755] The built-in memset function in GCC inadvertently generates code like "vst1.8 {d8-d9}, [sp:64]", which assumes an 8-byte alignment on the stack pointer $sp, leading to alignment vi

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111755

--- Comment #2 from Andrew Pinski  ---
Also can you attach the testcase where this happens?

Please read https://gcc.gnu.org/bugs/ on what information we need.

[Bug target/111755] The built-in memset function in GCC inadvertently generates code like "vst1.8 {d8-d9}, [sp:64]", which assumes an 8-byte alignment on the stack pointer $sp, leading to alignment vi

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111755

Andrew Pinski  changed:

   What|Removed |Added

   Last reconfirmed||2023-10-10
 Ever confirmed|0   |1
 Status|UNCONFIRMED |WAITING

--- Comment #1 from Andrew Pinski  ---
> which assumes an 8-byte alignment on the stack pointer $sp, leading to 
> alignment violations.

Isn't that the ABI?

What target is this for?