http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50721
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-unknown-linux-gnu
CC| |bernds at gcc dot gnu.org
Component|fortran |target
Target Milestone|--- |4.6.2
Summary|[4.6/4.7 Regression] |[4.6/4.7 Regression]
|gfortran miscompiles FGSL |Segfault of -O0 compiled
| |program on x86_64 related
| |to register allocator
--- Comment #7 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-10-13
23:56:40 UTC ---
Another observation: Works with -m32, fails with -m64 (on
x86_64-unknown-linux-gnu)
Regression hunting using 4.6.0 20100429 (experimental):
Works: Rev. 158910
Fails: Rev. 158911
That's the following commit:
Author: bernds
Date: Thu Apr 29 21:37:01 2010
New Revision: 158911
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=158911
Log:
PR target/42895
* doc/tm.texi (ADJUST_REG_ALLOC_ORDER): Renamed from
ORDER_REGS_FOR_LOCAL_ALLOC. All instances of this macro changed.
(HONOR_REG_ALLOC_ORDER): Describe new macro.
* ira.c (setup_alloc_regs): Use ADJUST_REG_ALLOC_ORDER if defined.
* ira-color.c (assign_hard_reg): Take prologue/epilogue costs into
account only if HONOR_REG_ALLOC_ORDER is not defined.
* config/arm/arm.h (HONOR_REG_ALLOC_ORDER): Define.
* system.h (ORDER_REGS_FOR_LOCAL_ALLOC): Poison.
