diff options
| author | DJ Delorie <dj@redhat.com> | 2015-12-08 21:59:05 -0500 |
|---|---|---|
| committer | DJ Delorie <dj@gcc.gnu.org> | 2015-12-08 21:59:05 -0500 |
| commit | eb457a8c59cfeb602d66f1ba379b6ec3e9475d90 (patch) | |
| tree | 2746026609721700402925e8fdc8815c905a67a4 /gcc | |
| parent | 6b9ac1796ec8eed79e8d5e4ef03a347a6c86a25c (diff) | |
| download | gcc-eb457a8c59cfeb602d66f1ba379b6ec3e9475d90.zip gcc-eb457a8c59cfeb602d66f1ba379b6ec3e9475d90.tar.gz gcc-eb457a8c59cfeb602d66f1ba379b6ec3e9475d90.tar.bz2 | |
rx.opt (-mjsr): Add.
* config/rx/rx.opt (-mjsr): Add.
* config/rx/predicates.md (rx_call_operand): Avoid overflowing
calls when -mjsr.
* config/rx/rx.c (rx_function_ok_for_sibcall): Likewise for
overflowing jumps.
* doc/invoke.texi (-mjsr): Document it.
From-SVN: r231439
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 9 | ||||
| -rw-r--r-- | gcc/config/rx/predicates.md | 4 | ||||
| -rw-r--r-- | gcc/config/rx/rx.c | 3 | ||||
| -rw-r--r-- | gcc/config/rx/rx.opt | 6 | ||||
| -rw-r--r-- | gcc/doc/invoke.texi | 10 |
5 files changed, 31 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 44eddde..cc95209 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,12 @@ +2015-12-08 DJ Delorie <dj@redhat.com> + + * config/rx/rx.opt (-mjsr): Add. + * config/rx/predicates.md (rx_call_operand): Avoid overflowing + calls when -mjsr. + * config/rx/rx.c (rx_function_ok_for_sibcall): Likewise for + overflowing jumps. + * doc/invoke.texi (-mjsr): Document it. + 2015-12-08 Jan Hubicka <hubicka@ucw.cz> PR ipa/61886 diff --git a/gcc/config/rx/predicates.md b/gcc/config/rx/predicates.md index 967a3ab..26667cf 100644 --- a/gcc/config/rx/predicates.md +++ b/gcc/config/rx/predicates.md @@ -24,7 +24,9 @@ ;; Only registers and symbol refs are allowed. (define_predicate "rx_call_operand" - (match_code "symbol_ref,reg") + (ior (match_code "reg") + (and (match_test "!TARGET_JSR") + (match_code "symbol_ref"))) ) ;; For sibcall operations we can only use a symbolic address. diff --git a/gcc/config/rx/rx.c b/gcc/config/rx/rx.c index c2c9591..781b6b1 100644 --- a/gcc/config/rx/rx.c +++ b/gcc/config/rx/rx.c @@ -2857,6 +2857,9 @@ rx_warn_func_return (tree decl) static bool rx_function_ok_for_sibcall (tree decl, tree exp ATTRIBUTE_UNUSED) { + if (TARGET_JSR) + return false; + /* Do not allow indirect tailcalls. The sibcall patterns do not support them. */ if (decl == NULL) diff --git a/gcc/config/rx/rx.opt b/gcc/config/rx/rx.opt index 11113e2..56e8adf 100644 --- a/gcc/config/rx/rx.opt +++ b/gcc/config/rx/rx.opt @@ -149,3 +149,9 @@ Enable the use of the LRA register allocator. mallow-string-insns Target Report Var(rx_allow_string_insns) Init(1) Enables or disables the use of the SMOVF, SMOVB, SMOVU, SUNTIL, SWHILE and RMPA instructions. Enabled by default. + +;--------------------------------------------------- + +mjsr +Target Report Mask(JSR) +Always use JSR, never BSR, for calls. diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 5ab565c..6162a60 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -968,6 +968,7 @@ See RS/6000 and PowerPC Options. -mint-register=@gol -mpid@gol -mallow-string-insns -mno-allow-string-insns@gol +-mjsr@gol -mno-warn-multiple-fast-interrupts@gol -msave-acc-in-interrupts} @@ -20685,6 +20686,15 @@ accesses I/O space. When the instructions are enabled GCC defines the C preprocessor symbol @code{__RX_ALLOW_STRING_INSNS__}, otherwise it defines the symbol @code{__RX_DISALLOW_STRING_INSNS__}. + +@item -mjsr +@itemx -mno-jsr +@opindex mjsr +@opindex mno-jsr +Use only (or not only) @code{JSR} instructions to access functions. +This option can be used when code size exceeds the range of @code{BSR} +instructions. Note that @option{-mno-jsr} does not mean to not use +@code{JSR} but instead means that any type of branch may be used. @end table @emph{Note:} The generic GCC command-line option @option{-ffixed-@var{reg}} |