[Bug target/115042] [14/15/16 Regression] valgrind test fails to compile on armv7 asm operand has impossible constraints or there are not enough registers

[vmakarov at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115042

--- Comment #10 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
The 1st patch resulted in failures of equivalence substitution in the postponed
insns and resulted in wrong code generation on some secondary targets.

The 2nd patch variant change postponing algorithm and solves the equivalence
problem of the previous variant.  The patch also constrains insn postponing
only to asm insns.  It makes the patch more safe and constrains different code
generation too very rare cases.