diff options
| author | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-06-01 18:19:09 +0000 |
|---|---|---|
| committer | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-06-01 18:19:09 +0000 |
| commit | 51d8e657d0087d91e4000f241de335121ea3810d (patch) | |
| tree | c2f32333e3d90048910804ca1577c829154c8c3b | |
| parent | 61ef64167ce0275c52cd71312c85692fdc3702da (diff) | |
| download | gcc-51d8e657d0087d91e4000f241de335121ea3810d.tar.gz | |
* common.opt (fjump-tables): New.
* doc/invoke.texi (-fno-jump-tables): Document.
* stmt.c (expand_end_case_type): Do not emit jump tables unless
flag_jump_tables.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@100457 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/common.opt | 4 | ||||
| -rw-r--r-- | gcc/doc/invoke.texi | 10 | ||||
| -rw-r--r-- | gcc/stmt.c | 1 |
4 files changed, 22 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 66269506c54..adfecf5de16 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2005-06-01 Joseph S. Myers <joseph@codesourcery.com> + + * common.opt (fjump-tables): New. + * doc/invoke.texi (-fno-jump-tables): Document. + * stmt.c (expand_end_case_type): Do not emit jump tables unless + flag_jump_tables. + 2005-06-01 Richard Earnshaw <richard.earnshaw@arm.com> * arm.md (bunordered, bordered, bungt, bunlt, bunge, bunle, buneq) diff --git a/gcc/common.opt b/gcc/common.opt index 91cc3c1ccc2..a603707508a 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -488,6 +488,10 @@ fivopts Common Report Var(flag_ivopts) Init(1) Optimize induction variables on trees +fjump-tables +Common Var(flag_jump_tables) Init(1) +Use jump tables for sufficiently large switch statements + fkeep-inline-functions Common Report Var(flag_keep_inline_functions) Generate code for functions even if they are fully inlined diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index a6483e8eaa8..94c4b2ead7a 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -732,6 +732,7 @@ See S/390 and zSeries Options. -finhibit-size-directive -finstrument-functions @gol -fno-common -fno-ident @gol -fpcc-struct-return -fpic -fPIC -fpie -fPIE @gol +-fno-jump-tables @gol -freg-struct-return -fshared-data -fshort-enums @gol -fshort-double -fshort-wchar @gol -fverbose-asm -fpack-struct[=@var{n}] -fstack-check @gol @@ -12582,6 +12583,15 @@ generated position independent code can be only linked into executables. Usually these options are used when @option{-pie} GCC option will be used during linking. +@item -fno-jump-tables +@opindex fno-jump-tables +Do not use jump tables for switch statements even where it would be +more efficient than other code generation strategies. This option is +of use in conjunction with @option{-fpic} or @option{-fPIC} for +building code which forms part of a dynamic linker and cannot +reference the address of a jump table. On some targets, jump tables +do not require a GOT and this option is not needed. + @item -ffixed-@var{reg} @opindex ffixed Treat the register named @var{reg} as a fixed register; generated code diff --git a/gcc/stmt.c b/gcc/stmt.c index d1e71dea4f1..6bdaf51b9db 100644 --- a/gcc/stmt.c +++ b/gcc/stmt.c @@ -2458,6 +2458,7 @@ expand_case (tree exp) #ifndef ASM_OUTPUT_ADDR_DIFF_ELT || flag_pic #endif + || !flag_jump_tables || TREE_CONSTANT (index_expr) /* If neither casesi or tablejump is available, we can only go this way. */ |