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| author | Richard Kenner <kenner@gcc.gnu.org> | 1994-07-30 12:54:26 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1994-07-30 12:54:26 -0400 |
| commit | 96c9d70dda35cd5901c6905172c44e472d49dc21 (patch) | |
| tree | 1e392c1d1b880f9fbed9c70c9957d31f9a1ee5b2 /gcc | |
| parent | 260ced47a74fd7867dac1853f75f9a6837501869 (diff) | |
| download | gcc-96c9d70dda35cd5901c6905172c44e472d49dc21.zip gcc-96c9d70dda35cd5901c6905172c44e472d49dc21.tar.gz gcc-96c9d70dda35cd5901c6905172c44e472d49dc21.tar.bz2 | |
(tablejump): Rework to look like normal add but verify that label is for next insn and is tablejump...
(tablejump): Rework to look like normal add but verify that label is
for next insn and is tablejump; look for ADDR_DIFF_ELT.
From-SVN: r7831
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/alpha/alpha.md | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/gcc/config/alpha/alpha.md b/gcc/config/alpha/alpha.md index fc9a5b8..93dec2c 100644 --- a/gcc/config/alpha/alpha.md +++ b/gcc/config/alpha/alpha.md @@ -2546,8 +2546,9 @@ (define_expand "tablejump" [(set (match_dup 3) (sign_extend:DI (match_operand:SI 0 "register_operand" ""))) - (parallel [(set (pc) (plus:DI (match_dup 3) (reg:DI 29))) - (use (label_ref (match_operand 1 "" ""))) + (parallel [(set (pc) + (plus:DI (match_dup 3) + (label_ref:DI (match_operand 1 "" "")))) (clobber (match_scratch:DI 2 "=r"))])] "" " @@ -2556,19 +2557,20 @@ (define_insn "" [(set (pc) (plus:DI (match_operand:DI 0 "register_operand" "r") - (reg:DI 29))) - (use (label_ref (match_operand 1 "" ""))) + (label_ref:DI (match_operand 1 "" "")))) (clobber (match_scratch:DI 2 "=r"))] - "" + "next_active_insn (insn) != 0 + && GET_CODE (PATTERN (next_active_insn (insn))) == ADDR_DIFF_VEC + && PREV_INSN (next_active_insn (insn)) == operands[1]" "* { rtx best_label = 0; rtx jump_table_insn = next_active_insn (operands[1]); if (GET_CODE (jump_table_insn) == JUMP_INSN - && GET_CODE (PATTERN (jump_table_insn)) == ADDR_VEC) + && GET_CODE (PATTERN (jump_table_insn)) == ADDR_DIFF_VEC) { rtx jump_table = PATTERN (jump_table_insn); - int n_labels = XVECLEN (jump_table, 0); + int n_labels = XVECLEN (jump_table, 1); int best_count = -1; int i, j; @@ -2577,12 +2579,12 @@ int count = 1; for (j = i + 1; j < n_labels; j++) - if (XEXP (XVECEXP (jump_table, 0, i), 0) - == XEXP (XVECEXP (jump_table, 0, j), 0)) + if (XEXP (XVECEXP (jump_table, 1, i), 0) + == XEXP (XVECEXP (jump_table, 1, j), 0)) count++; if (count > best_count) - best_count = count, best_label = XVECEXP (jump_table, 0, i); + best_count = count, best_label = XVECEXP (jump_table, 1, i); } } |