[Bug target/78658] powerpc64le: ICE with -mcpu=power9 -Og

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78658

--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Tue Dec  6 22:15:31 2016
New Revision: 243320

URL: https://gcc.gnu.org/viewcvs?rev=243320&root=gcc&view=rev
Log:
[gcc]
2016-12-06  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/78658
        * config/rs6000/rs6000.md (zero_extendqi<mode>2): Use ^ instead of
        ?* constraints for the ISA 3.0 patterns, so the register allocator
        is more likely to allocate QImode/HImode to vector registers for
        conversion to floating point unless a reload is needed.
        (zero_extendhi<mode>2): Likewise.
        (float<QHI:mode><FP_ISA3:mode>2_internal): Properly deal with the
        first alternative which is converting QImode/HImode to floating
        point and the QImode/HImode value is in a vector register, and
        does not allocate the second pseudo register.  Remove zero
        extending into traditional floating point registers, since the
        instruction used only works on traditional altivec registers.
        (floatuns<QHI:mode><FP_ISA3:mode>2_internal): Likewise.

[gcc/testsuite]
2016-12-06  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/78658
        * gcc.target/powerpc/pr78658.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/powerpc/pr78658.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.md
    trunk/gcc/testsuite/ChangeLog