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| author | Ulrich Weigand <uweigand@de.ibm.com> | 2004-01-28 00:14:00 +0000 |
|---|---|---|
| committer | Ulrich Weigand <uweigand@gcc.gnu.org> | 2004-01-28 00:14:00 +0000 |
| commit | 590fcf48ae3cd3527077ee13e54ad60b2d83037a (patch) | |
| tree | f428a6f4bbc64a95d745da8191034eafbae32c2c /gcc/doc | |
| parent | 62b21ea0fca95b23e9a5f3b5823ece85bea133d4 (diff) | |
| download | gcc-590fcf48ae3cd3527077ee13e54ad60b2d83037a.zip gcc-590fcf48ae3cd3527077ee13e54ad60b2d83037a.tar.gz gcc-590fcf48ae3cd3527077ee13e54ad60b2d83037a.tar.bz2 | |
s390.h (TARGET_DEFAULT): Default to !TARGET_BACKCHAIN.
* config/s390/s390.h (TARGET_DEFAULT): Default to !TARGET_BACKCHAIN.
* config/s390/s390.c (s390_return_addr_rtx): Fail for all but current
frame if !TARGET_BACKCHAIN.
* config/s390/s390.md ("allocate_stack"): Use pattern only if
TARGET_BACKCHAIN.
* doc/invoke.texi (-mbackchain/-mno-backchain): Document new default.
From-SVN: r76767
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index c21bdf3..440c3d7 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -10098,8 +10098,9 @@ generates IEEE floating-point instructions. This is the default. @opindex mno-backchain Generate (or do not generate) code which maintains an explicit backchain within the stack frame that points to the caller's frame. -This is currently needed to allow debugging. The default is to -generate the backchain. +This may be needed to allow debugging using tools that do not understand +DWARF-2 call frame information. The default is not to generate the +backchain. @item -msmall-exec @itemx -mno-small-exec |