[Bug rtl-optimization/72488] [7 Regression] wrong code (SIGFPE) at -Os and above on x86_64-linux-gnu (in the 64-bit mode)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72488

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
-Os -fno-tree-sink -fno-tree-reassoc -fno-tree-loop-im -fno-tree-pre
-fdisable-tree-ifcombine -fno-tree-loop-optimize  -fno-tree-forwprop
-fdisable-tree-vrp2 -fdisable-tree-phiopt3 -fdisable-tree-phiopt2
-fdump-tree-all-lineno -fdisable-tree-widening_mul -fdisable-tree-dom3
-fdisable-tree-phicprop2 -fdisable-tree-slsr -fdisable-tree-pre
-fdisable-tree-dom2 -fdisable-tree-cselim -fdisable-tree-phiopt1
-fdisable-tree-tailr2 -fdisable-tree-ch2 -fdisable-tree-cdce
-fdisable-tree-isolate-paths -fno-if-conversion -fno-if-conversion2
-fdbg-cnt=registered_jump_thread:0 -fdisable-tree-phicprop1
-fdisable-tree-bswap -fdisable-tree-laddress -fdisable-tree-sra
-fno-move-loop-invariants -da -fdisable-rtl-hoist

still reproduces it.  Looking at VRP1 in more detail may be worth, eventually
adding some debug counter for substitute-and-fold to force some ranges
varying.