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| author | Richard Henderson <rth@cygnus.com> | 2000-01-06 17:46:25 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-01-06 17:46:25 -0800 |
| commit | 373a9956d89e89f6769aae98a4cc2f7c9ec4b15e (patch) | |
| tree | 407b344546f554f0e2a571ccdd0c4d0fde0ac6cf /gcc | |
| parent | ee77eda571f5a82d2836c83c5a62914669397b73 (diff) | |
| download | gcc-373a9956d89e89f6769aae98a4cc2f7c9ec4b15e.zip gcc-373a9956d89e89f6769aae98a4cc2f7c9ec4b15e.tar.gz gcc-373a9956d89e89f6769aae98a4cc2f7c9ec4b15e.tar.bz2 | |
alpha.md (adddi_2+1): Limit offset such that it will be loadable with a single ldah+lda pair.
* alpha.md (adddi_2+1): Limit offset such that it will be
loadable with a single ldah+lda pair.
(adddi_2+2): Explicitly fail split if we can't make it work.
From-SVN: r31267
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/alpha/alpha.md | 26 |
2 files changed, 30 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2e75b1d..86e1dda 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2000-01-06 Richard Henderson <rth@cygnus.com> + + * alpha.md (adddi_2+1): Limit offset such that it will be + loadable with a single ldah+lda pair. + (adddi_2+2): Explicitly fail split if we can't make it work. + 2000-01-06 Mumit Khan <khan@xraylith.wisc.edu> * protoize.c: Conditionally include unistd.h. diff --git a/gcc/config/alpha/alpha.md b/gcc/config/alpha/alpha.md index 31c3555..577cbe6 100644 --- a/gcc/config/alpha/alpha.md +++ b/gcc/config/alpha/alpha.md @@ -593,7 +593,19 @@ [(set (match_operand:DI 0 "register_operand" "=r") (plus:DI (match_operand:DI 1 "reg_no_subreg_operand" "r") (match_operand:DI 2 "const_int_operand" "n")))] - "REG_OK_FP_BASE_P (operands[1])" + "REG_OK_FP_BASE_P (operands[1]) + && INTVAL (operands[2]) >= 0 + /* This is the largest constant an lda+ldah pair can add, minus + an upper bound on the displacement between SP and AP during + register elimination. See INITIAL_ELIMINATION_OFFSET. */ + && INTVAL (operands[2]) + < (0x7fff8000 + - FIRST_PSEUDO_REGISTER * UNITS_PER_WORD + - ALPHA_ROUND(current_function_outgoing_args_size) + - (ALPHA_ROUND (get_frame_size () + + max_reg_num () * UNITS_PER_WORD + + current_function_pretend_args_size) + - current_function_pretend_args_size))" "#") ;; Don't do this if we are adjusting SP since we don't want to do it @@ -614,8 +626,18 @@ HOST_WIDE_INT low = (val & 0xffff) - 2 * (val & 0x8000); HOST_WIDE_INT rest = val - low; - operands[3] = GEN_INT (rest); operands[4] = GEN_INT (low); + if (CONST_OK_FOR_LETTER_P (rest, 'L')) + operands[3] = GEN_INT (rest); + else if (! no_new_pseudos) + { + operands[3] = gen_reg_rtx (DImode); + emit_move_insn (operands[3], operands[2]); + emit_insn (gen_adddi3 (operands[0], operands[1], operands[3])); + DONE; + } + else + FAIL; }") (define_insn "" |