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| author | Ben Elliston <bje@gcc.gnu.org> | 2006-01-13 09:15:26 +1100 |
|---|---|---|
| committer | Ben Elliston <bje@gcc.gnu.org> | 2006-01-13 09:15:26 +1100 |
| commit | 1cd99a23170ba575038abfd96bd0694e363e944c (patch) | |
| tree | 914665bdaa03f828fb3f838c805d2c632bd14cac | |
| parent | 04aff2c049817a650207994adad47b1259f1cb7d (diff) | |
| download | gcc-1cd99a23170ba575038abfd96bd0694e363e944c.zip gcc-1cd99a23170ba575038abfd96bd0694e363e944c.tar.gz gcc-1cd99a23170ba575038abfd96bd0694e363e944c.tar.bz2 | |
rtl.texi (Insns): Remove statement that libcalls cannot return in memory...
* doc/rtl.texi (Insns): Remove statement that libcalls cannot
return in memory, as this is no limitation is no longer present.
From-SVN: r109649
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/doc/rtl.texi | 9 |
2 files changed, 8 insertions, 9 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 38405e7..0436ceaa 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2006-01-13 Ben Elliston <bje@au.ibm.com> + + * doc/rtl.texi (Insns): Remove statement that libcalls cannot + return in memory, as this is no limitation is no longer present. + 2006-01-12 DJ Delorie <dj@redhat.com> * config/m32c/addsub.md (addhi3): Add two more alternatives, for @@ -10,7 +15,8 @@ DTORS_SECTION_ASM_OP, INIT_ARRAY_SECTION_ASM_OP, FINI_ARRAY_SECTION_ASM_OP): Define. - * config/m32c/m32c.c (m32c_legitimize_address): Remove temporary variable. + * config/m32c/m32c.c (m32c_legitimize_address): Remove temporary + variable. (m32c_legitimize_reload_address): New logic to reload FB to An. (m32c_output_reg_push): Add newline. (m32c_output_reg_pop): Likewise. diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index 1150ae3..acd99c9 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -2991,14 +2991,7 @@ TARGET_PASS_BY_REFERENCE}) are stored. If the argument is caller-copied (@pxref{Register Arguments, TARGET_CALLEE_COPIES}), the stack slot will be mentioned in @code{CLOBBER} and @code{USE} entries; if it's callee-copied, only a @code{USE} will appear, and the -@code{MEM} may point to addresses that are not stack slots. These -@code{MEM}s are used only in libcalls, because, unlike regular function -calls, @code{CONST_CALL}s (which libcalls generally are, @pxref{Flags, -CONST_CALL_P}) aren't assumed to read and write all memory, so flow -would consider the stores dead and remove them. Note that, since a -libcall must never return values in memory (@pxref{Aggregate Return, -RETURN_IN_MEMORY}), there will never be a @code{CLOBBER} for a memory -address holding a return value. +@code{MEM} may point to addresses that are not stack slots. @code{CLOBBER}ed registers in this list augment registers specified in @code{CALL_USED_REGISTERS} (@pxref{Register Basics}). |