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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 | |
| 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')
| -rw-r--r-- | gcc/ChangeLog | 9 | ||||
| -rw-r--r-- | gcc/config/s390/s390.c | 5 | ||||
| -rw-r--r-- | gcc/config/s390/s390.h | 4 | ||||
| -rw-r--r-- | gcc/config/s390/s390.md | 2 | ||||
| -rw-r--r-- | gcc/doc/invoke.texi | 5 |
5 files changed, 20 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c5c093c..9b73990 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,12 @@ +2004-01-27 Ulrich Weigand <uweigand@de.ibm.com> + + * 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. + 2004-01-27 Zack Weinberg <zack@codesourcery.com> * ia64.c (ia64_function_arg): When placing HFAs in integer diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index e19bf00..72946ac 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -5267,6 +5267,11 @@ s390_return_addr_rtx (int count, rtx frame) { rtx addr; + /* Without backchain, we fail for all but the current frame. */ + + if (!TARGET_BACKCHAIN && count > 0) + return NULL_RTX; + /* For the current frame, we need to make sure the initial value of RETURN_REGNUM is actually saved. */ diff --git a/gcc/config/s390/s390.h b/gcc/config/s390/s390.h index 48a91ba..8ef6b68 100644 --- a/gcc/config/s390/s390.h +++ b/gcc/config/s390/s390.h @@ -114,9 +114,9 @@ extern int target_flags; #define TARGET_IEEE_FLOAT 1 #ifdef DEFAULT_TARGET_64BIT -#define TARGET_DEFAULT 0x33 +#define TARGET_DEFAULT 0x31 #else -#define TARGET_DEFAULT 0x3 +#define TARGET_DEFAULT 0x1 #endif #define TARGET_SWITCHES \ diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md index 215848b..73310fa 100644 --- a/gcc/config/s390/s390.md +++ b/gcc/config/s390/s390.md @@ -7246,7 +7246,7 @@ (plus (reg 15) (match_operand 1 "general_operand" ""))) (set (match_operand 0 "general_operand" "") (reg 15))] - "" + "TARGET_BACKCHAIN" { rtx stack = gen_rtx (REG, Pmode, STACK_POINTER_REGNUM); rtx chain = gen_rtx (MEM, Pmode, stack); 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 |