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2cace1cd68
reg-stack pass does not maintain the data flow information correctly.
call df_insn_rescan_all after the transformation is done.
gcc/
PR rtl-optimization/97777
* reg-stack.c (rest_of_handle_stack_regs): call
df_insn_rescan_all if reg_to_stack return true.
gcc/testsuite/
PR rtl-optimization/97777
* gcc.target/i386/pr97777.c: New test.
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