diff options
| author | Joseph Myers <joseph@codesourcery.com> | 2008-06-04 12:17:50 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2008-06-04 12:17:50 +0000 |
| commit | d8d060b871814c10555071404eb88dd7f9a6aed7 (patch) | |
| tree | 34d800b5977091b32c2932a09d612fb5986fd13c /gcc/config/m68k/m68k.c | |
| parent | 17086702c1afbca195ddcffabb7e8f36e86ae9ff (diff) | |
2008-06-04 Joseph Myers <joseph@codesourcery.com>
Maxim Kuvyrkov <maxim@codesourcery.com>
* config/m68k/m68k.opt (mxgot): New option.
* config/m68k/m68k.c (legitimize_pic_address): Handle -mxgot.
(m68k_output_addr_const_extra): New.
* config/m68k/m68k.h (OUTPUT_ADDR_CONST_EXTRA): New.
* config/m68k/m68k-protos.h (m68k_output_addr_const_extra): Declare.
* config/m68k/m68k.md (UNSPEC_GOTOFF): Define.
* doc/invoke.texi (M680x0 Options): Document -mxgot.
testsuite:
2008-06-04 Joseph Myers <joseph@codesourcery.com>
Maxim Kuvyrkov <maxim@codesourcery.com>
* gcc.target/m68k/xgot-1.c: New test.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@136355 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/m68k/m68k.c')
| -rw-r--r-- | gcc/config/m68k/m68k.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/gcc/config/m68k/m68k.c b/gcc/config/m68k/m68k.c index 52a60da0664..a1437d29c36 100644 --- a/gcc/config/m68k/m68k.c +++ b/gcc/config/m68k/m68k.c @@ -2059,9 +2059,30 @@ legitimize_pic_address (rtx orig, enum machine_mode mode ATTRIBUTE_UNUSED, { gcc_assert (reg); - pic_ref = gen_rtx_MEM (Pmode, - gen_rtx_PLUS (Pmode, - pic_offset_table_rtx, orig)); + if (TARGET_COLDFIRE && TARGET_XGOT) + /* When compiling with -mxgot switch the code for the above + example will look like this: + + movel a5, a0 + addl _foo@GOT, a0 + movel a0@, a0 + movel #12345, a0@ */ + { + rtx pic_offset; + + /* Wrap ORIG in UNSPEC_GOTOFF to tip m68k_output_addr_const_extra + to put @GOT after reference. */ + pic_offset = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, orig), + UNSPEC_GOTOFF); + pic_offset = gen_rtx_CONST (Pmode, pic_offset); + emit_move_insn (reg, pic_offset); + emit_insn (gen_addsi3 (reg, reg, pic_offset_table_rtx)); + pic_ref = gen_rtx_MEM (Pmode, reg); + } + else + pic_ref = gen_rtx_MEM (Pmode, + gen_rtx_PLUS (Pmode, + pic_offset_table_rtx, orig)); crtl->uses_pic_offset_table = 1; MEM_READONLY_P (pic_ref) = 1; emit_move_insn (reg, pic_ref); @@ -3869,6 +3890,20 @@ print_operand (FILE *file, rtx op, int letter) } } +/* m68k implementation of OUTPUT_ADDR_CONST_EXTRA. */ + +bool +m68k_output_addr_const_extra (FILE *file, rtx x) +{ + if (GET_CODE (x) != UNSPEC || XINT (x, 1) != UNSPEC_GOTOFF) + return false; + + output_addr_const (file, XVECEXP (x, 0, 0)); + /* ??? What is the non-MOTOROLA syntax? */ + fputs ("@GOT", file); + return true; +} + /* A C compound statement to output to stdio stream STREAM the assembler syntax for an instruction operand that is a memory |