0f6f72e805
With some undefined code, combine generates patterns where the arguments to
*_extract are out of range, e.b. a negative bit position. If the s390 backend
accepts these, they lead to not just undefined behaviour but invalid assembly
instructions (argument out of the allowed range). So this patch makes sure
that the rtl expressions with out of range arguments are rejected.
gcc/ChangeLog:
2016-12-02 Dominik Vogt <vogt@linux.vnet.ibm.com>
PR target/77822
* config/s390/s390.md ("extzv")
("*extzv<mode><clobbercc_or_nocc>")
("*extzvdi<clobbercc_or_nocc>_lshiftrt")
("*<risbg_n>_ior_and_sr_ze")
("*extract1bitdi<clobbercc_or_nocc>")
("*insv<mode><clobbercc_or_nocc>", "*insv_rnsbg_noshift")
("*insv_rnsbg_srl", "*insv<mode>_mem_reg")
("*insvdi_mem_reghigh", "*insvdi_reg_imm"): Use EXTRACT_ARGS_IN_RANGE
to validate the arguments of zero_extract and sign_extract.
gcc/testsuite/ChangeLog:
2016-12-02 Dominik Vogt <vogt@linux.vnet.ibm.com>
PR target/77822
* gcc.target/s390/s390.exp: Support .C tests.
* gcc.target/s390/pr77822-2.c: New test.
* gcc.target/s390/pr77822-1.C: New test.
From-SVN: r243160
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