https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122692
Bug ID: 122692
Summary: U16 array to U8 array saturation test fails on
riscv64-linux-gnu
Product: gcc
Version: 15.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: john_platts at hotmail dot com
Target Milestone: ---
Created attachment 62811
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62811&action=edit
Test program to reproduce GCC 15 bug on riscv64-linux-gnu
Attached is a test program that fails on riscv64-linux-gnu when compiled with
GCC 15.2.0 but runs successfully on x86_64-linux-gnu when compiled with GCC
15.2.0.
The same compiler bug also causes failures in TestAllReorderDemote2To in Google
Highway with the EMU128 target on RISC-V, and this GCC compiler bug is reported
at https://github.com/google/highway/issues/2793.
The attached test program needs to be compiled with the -O3 -fPIC -fPIE -fpie
-std=c++17 options.
To trigger this GCC 15 compiler bug, the arrays need to be allocated through a
function with the __attribute__((__noinline__,__noipa__)) that in turn
allocates the array using ::malloc.
