[Bug rtl-optimization/14782] [3.3/3.4/3.5 Regression] produces an unaligned data access at -O2

[danglin at gcc dot gnu dot org]

------- Additional Comments From danglin at gcc dot gnu dot org  2004-06-20 00:08 -------
With Carlos's testcase at -O2, the initial insns in the function bug are:

        ldi 0,%r20
        ldo 1(%r26),%r26
        ldo 1(%r20),%r20
        ldd 23(%r26),%r21

This appears to be a bug in the PA GO_IF_LEGITIMATE_ADDRESS macro.  It should
reject 14-bit offsets for DImode loads that aren't properly aligned as ldd
doesn't support them.  ldd differs from ldb/ldh/ldw in this respect.  It
needs both the base and displacement aligned.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14782