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i386.h (CONST_DOUBLE_OK_FOR_LETTER_P): Return 0 when eliminating the frame pointer and compiling PIC code and reload...

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* i386.h (CONST_DOUBLE_OK_FOR_LETTER_P): Return 0 when eliminating
        the frame pointer and compiling PIC code and reload has not completed.

From-SVN: r21392
This commit is contained in:
H.J. Lu 1998-07-26 00:34:10 +00:00 committed by Jeff Law
parent 3abe23a0eb
commit 61dd26e6ba
2 changed files with 14 additions and 2 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
Sun Jul 26 01:11:12 1998 H.J. Lu (hjl@gnu.org)
* i386.h (CONST_DOUBLE_OK_FOR_LETTER_P): Return 0 when eliminating
the frame pointer and compiling PIC code and reload has not completed.
* i386.c (output_to_reg): Add code to emulate non-popping DImode
case.

13
gcc/config/i386/i386.h
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@ -896,10 +896,19 @@ enum reg_class
/* Similar, but for floating constants, and defining letters G and H.
Here VALUE is the CONST_DOUBLE rtx itself. We allow constants even if
TARGET_387 isn't set, because the stack register converter may need to
load 0.0 into the function value register. */
load 0.0 into the function value register.
We disallow these constants when -fomit-frame-pointer and compiling
PIC code since reload might need to force the constant to memory.
Forcing the constant to memory changes the elimination offsets after
the point where they must stay constant.
However, we must allow them after reload as completed as reg-stack.c
will create insns which use these constants. */
#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
((C) == 'G' ? standard_80387_constant_p (VALUE) : 0)
(((reload_completed || !flag_pic || !flag_omit_frame_pointer) && (C) == 'G') \
? standard_80387_constant_p (VALUE) : 0)
/* Place additional restrictions on the register class to use when it
is necessary to be able to hold a value of mode MODE in a reload