diff options
| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-05-08 01:34:55 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-05-08 01:34:55 +0000 |
| commit | 886ccd9a3d2721d4cd88ab3e051bf07257e1d1e1 (patch) | |
| tree | 68b9ea358e14d47ebe5bf789990ddda92faa07d0 /gcc | |
| parent | 785f5424fc86e7d04f8230a198645aa0b535ea0f (diff) | |
| download | gcc-886ccd9a3d2721d4cd88ab3e051bf07257e1d1e1.tar.gz | |
* reload1.c (gen_mode_int): New function.
(reload_cse_move2add): Use it to generate the new constants.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@26834 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/reload1.c | 29 |
2 files changed, 30 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3081ed59d60..1f5eda9c25f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Sat May 8 01:34:19 1999 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> + + * reload1.c (gen_mode_int): New function. + (reload_cse_move2add): Use it to generate the new constants. + Sat May 8 01:25:09 1999 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * varasm.c (output_constant): Do nothing if -fsyntax-only. diff --git a/gcc/reload1.c b/gcc/reload1.c index c566d3819d0..f16ed109875 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -9962,6 +9962,24 @@ static enum machine_mode reg_mode[FIRST_PSEUDO_REGISTER]; reload_cse_move2add and move2add_note_store. */ static int move2add_luid; +/* Generate a CONST_INT and force it in the range of MODE. */ +static rtx +gen_mode_int (mode, value) + enum machine_mode mode; + HOST_WIDE_INT value; +{ + HOST_WIDE_INT cval = value & GET_MODE_MASK (mode); + int width = GET_MODE_BITSIZE (mode); + + /* If MODE is narrower than HOST_WIDE_INT and CVAL is a negative number, + sign extend it. */ + if (width > 0 && width < HOST_BITS_PER_WIDE_INT + && (cval & ((HOST_WIDE_INT) 1 << (width - 1))) != 0) + cval |= (HOST_WIDE_INT) -1 << width; + + return GEN_INT (cval); +} + static void reload_cse_move2add (first) rtx first; @@ -10013,8 +10031,9 @@ reload_cse_move2add (first) if (GET_CODE (src) == CONST_INT && reg_base_reg[regno] < 0) { int success = 0; - rtx new_src = GEN_INT (INTVAL (src) - - INTVAL (reg_offset[regno])); + rtx new_src + = gen_mode_int (GET_MODE (reg), + INTVAL (src) - INTVAL (reg_offset[regno])); /* (set (reg) (plus (reg) (const_int 0))) is not canonical; use (set (reg) (reg)) instead. We don't delete this insn, nor do we convert it into a @@ -10059,8 +10078,10 @@ reload_cse_move2add (first) && GET_CODE (XEXP (SET_SRC (set), 1)) == CONST_INT) { rtx src3 = XEXP (SET_SRC (set), 1); - rtx new_src = GEN_INT (INTVAL (src3) - - INTVAL (reg_offset[regno])); + rtx new_src + = gen_mode_int (GET_MODE (reg), + INTVAL (src3) + - INTVAL (reg_offset[regno])); int success = 0; if (new_src == const0_rtx) |