https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96347
--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> --- Created attachment 48946 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48946&action=edit disallow tpoff+offset from being stored in a temp Patch prevents the forced temp from being used to replace the rhs of the original PLUS expr at memory_address_addr_space (explow.c:434), so the excess errors are gone. Alters the resultant assembly in the following way: --- @@ -35,15 +35,11 @@ _Z5chain6Darray: main: .LFB4: .cfi_startproc - pushq %rbp - .cfi_def_cfa_offset 16 - .cfi_offset 6, -16 - leaq 8+testYearsBC@tpoff, %rbp pushq %rbx - .cfi_def_cfa_offset 24 - .cfi_offset 3, -24 - subq $40, %rsp - .cfi_def_cfa_offset 64 + .cfi_def_cfa_offset 16 + .cfi_offset 3, -16 + subq $32, %rsp + .cfi_def_cfa_offset 48 leaq 17(%rsp), %rbx jmp .L6 .p2align 4,,10 @@ -56,11 +52,11 @@ main: movl $0, (%rbx) movw %ax, 4(%rbx) movb $0, 6(%rbx) - movq %fs:0(%rbp), %rdx movq %fs:testYearsBC@tpoff, %rax + movq %fs:8+testYearsBC@tpoff, %rdx movb $0, 16(%rsp) - movq %rdx, 8(%rsp) movq %rax, (%rsp) + movq %rdx, 8(%rsp) testq %rax, %rax je .L7 jmp .L9 @@ -71,9 +67,8 @@ main: main.cold: .LFSB4: .L7: - .cfi_def_cfa_offset 64 - .cfi_offset 3, -24 - .cfi_offset 6, -16 + .cfi_def_cfa_offset 48 + .cfi_offset 3, -16 call abort@PLT .cfi_endproc .LFE4:
