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| author | H.J. Lu <hjl@gnu.org> | 1998-07-26 00:34:10 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-07-25 18:34:10 -0600 |
| commit | 61dd26e6ba68d5698c7637f369c53d56de4c7fff (patch) | |
| tree | 723019ae3e377580a9ff7063d66f96b69e092002 | |
| parent | 3abe23a0ebc7fa6dd5f9a12d35a024d4fbfb5da1 (diff) | |
| download | gcc-61dd26e6ba68d5698c7637f369c53d56de4c7fff.zip gcc-61dd26e6ba68d5698c7637f369c53d56de4c7fff.tar.gz gcc-61dd26e6ba68d5698c7637f369c53d56de4c7fff.tar.bz2 | |
i386.h (CONST_DOUBLE_OK_FOR_LETTER_P): Return 0 when eliminating the frame pointer and compiling PIC code and reload...
* 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
| -rw-r--r-- | gcc/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/config/i386/i386.h | 13 |
2 files changed, 14 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index fd39809..572d235 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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. diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h index 51c0783..75e8bae 100644 --- a/gcc/config/i386/i386.h +++ b/gcc/config/i386/i386.h @@ -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 |