[Bug target/89506] [7/8/9 Regression] ICE: in decompose, at rtl.h:2266 with -Og -g

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89506

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45840
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45840&action=edit
gcc9-pr89506.patch

If 0x80000000 is the only immediate in which adds r0,r0,#imm and adds
r0,r0,#-imm differ in condition code flags settings, then we could just use
this patch.