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re PR target/32413 (internal compiler error: in reload_cse_simplify_operands, at postreload.c:396) 

PR target/32413
    * config/i386/i386.c (ix86_register_move_cost): Rise the cost of
    moves between MMX/SSE registers to at least 8 units to prevent
    ICE caused by non-tieable SI/HI/QImodes in SSE registers.

From-SVN: r125951
This commit is contained in:
Uros Bizjak 2007-06-22 19:51:06 +02:00 committed by Uros Bizjak
parent 58a9545435
commit 147bbdd051
2 changed files with 16 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2007-06-22 Uros Bizjak <ubizjak@gmail.com>
PR target/32413
* config/i386/i386.c (ix86_register_move_cost): Rise the cost of
moves between MMX/SSE registers to at least 8 units to prevent
ICE caused by non-tieable SI/HI/QImodes in SSE registers.
2007-06-22 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.c (override_options): Correct x86_sahf

10
gcc/config/i386/i386.c
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@ -20279,7 +20279,15 @@ ix86_register_move_cost (enum machine_mode mode, enum reg_class class1,
/* Moves between SSE/MMX and integer unit are expensive. */
if (MMX_CLASS_P (class1) != MMX_CLASS_P (class2)
|| SSE_CLASS_P (class1) != SSE_CLASS_P (class2))
return ix86_cost->mmxsse_to_integer;
/* ??? By keeping returned value relatively high, we limit the number
of moves between integer and MMX/SSE registers for all targets.
Additionally, high value prevents problem with x86_modes_tieable_p(),
where integer modes in MMX/SSE registers are not tieable
because of missing QImode and HImode moves to, from or between
MMX/SSE registers. */
return MAX (ix86_cost->mmxsse_to_integer, 8);
if (MAYBE_FLOAT_CLASS_P (class1))
return ix86_cost->fp_move;
if (MAYBE_SSE_CLASS_P (class1))