https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119171
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by H.J. Lu <h...@gcc.gnu.org>: https://gcc.gnu.org/g:06440e726acfa9c9695a07dc524a832a53057ad6 commit r15-7957-g06440e726acfa9c9695a07dc524a832a53057ad6 Author: H.J. Lu <hjl.to...@gmail.com> Date: Sun Mar 9 07:00:23 2025 -0700 i386: Verify that argument registers are spilled properly While working on a local x86 patch, which passed the GCC testsuite, I got a compiler error: In function âparavirt_read_msrâ, inlined from âperf_ibs_handle_irqâ at arch/x86/events/amd/ibs.c:1055:2: ./arch/x86/include/asm/paravirt_types.h:397:17: error: âasmâ operand has impossible constraints or there are not enough registers 397 | asm volatile(ALTERNATIVE(PARAVIRT_CALL, ALT_CALL_INSTR, \ | ^~~ when building x86-64 Linux kernel. RDI, RSI, RDX and RCX registers are used to pass arguments in 64-bit mode. EAX, EDX and ECX registers are used to pass arguments in 32-bit mode. But there is no coverage in the GCC testsuite. Add tests to verify that argument registers are spilled properly. PR target/119171 * gcc.target/i386/pr119171-1.c: New test. * gcc.target/i386/pr119171-2.c: Likewise. Signed-off-by: H.J. Lu <hjl.to...@gmail.com>
