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| author | Richard Kenner <kenner@gcc.gnu.org> | 1996-10-23 10:30:26 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1996-10-23 10:30:26 -0400 |
| commit | 02214a5c1475a8fd2ed983889eab632f31708704 (patch) | |
| tree | 47bb500a8efd2abe9289f806cc3d31a6d6ec25a9 /gcc | |
| parent | 39647dcba53dcaa2e18984b86f5546589e92738a (diff) | |
| download | gcc-02214a5c1475a8fd2ed983889eab632f31708704.zip gcc-02214a5c1475a8fd2ed983889eab632f31708704.tar.gz gcc-02214a5c1475a8fd2ed983889eab632f31708704.tar.bz2 | |
(emit_libcall_block): Before adding an REG_EQUAL note, check that it will really apply to a single instruction.
(emit_libcall_block): Before adding an REG_EQUAL note, check that it will
really apply to a single instruction.
(expand_binop, expand_fix): Likewise.
From-SVN: r13005
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/optabs.c | 53 |
1 files changed, 32 insertions, 21 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index b34dad0..d743fc8 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -964,13 +964,16 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods) if (i == GET_MODE_BITSIZE (mode) / BITS_PER_WORD) { - rtx temp = emit_move_insn (target, target); + if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing) + { + rtx temp = emit_move_insn (target, target); - REG_NOTES (temp) = gen_rtx (EXPR_LIST, REG_EQUAL, - gen_rtx (binoptab->code, mode, - copy_rtx (xop0), - copy_rtx (xop1)), - REG_NOTES (temp)); + REG_NOTES (temp) = gen_rtx (EXPR_LIST, REG_EQUAL, + gen_rtx (binoptab->code, mode, + copy_rtx (xop0), + copy_rtx (xop1)), + REG_NOTES (temp)); + } return target; } else @@ -1144,12 +1147,15 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods) if (temp != 0) { - temp = emit_move_insn (product, product); - REG_NOTES (temp) = gen_rtx (EXPR_LIST, REG_EQUAL, - gen_rtx (MULT, mode, copy_rtx (op0), - copy_rtx (op1)), - REG_NOTES (temp)); - + if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing) + { + temp = emit_move_insn (product, product); + REG_NOTES (temp) = gen_rtx (EXPR_LIST, REG_EQUAL, + gen_rtx (MULT, mode, + copy_rtx (op0), + copy_rtx (op1)), + REG_NOTES (temp)); + } return product; } } @@ -2613,8 +2619,10 @@ emit_libcall_block (insns, target, result, equiv) } last = emit_move_insn (target, result); - REG_NOTES (last) = gen_rtx (EXPR_LIST, - REG_EQUAL, copy_rtx (equiv), REG_NOTES (last)); + if (mov_optab->handlers[(int) GET_MODE (target)].insn_code + != CODE_FOR_nothing) + REG_NOTES (last) = gen_rtx (EXPR_LIST, + REG_EQUAL, copy_rtx (equiv), REG_NOTES (last)); if (prev == 0) first = get_insns (); @@ -3823,13 +3831,16 @@ expand_fix (to, from, unsignedp) emit_label (lab2); - /* Make a place for a REG_NOTE and add it. */ - insn = emit_move_insn (to, to); - REG_NOTES (insn) = gen_rtx (EXPR_LIST, REG_EQUAL, - gen_rtx (UNSIGNED_FIX, GET_MODE (to), - copy_rtx (from)), - REG_NOTES (insn)); - + if (mov_optab->handlers[(int) GET_MODE (to)].insn_code + != CODE_FOR_nothing) + { + /* Make a place for a REG_NOTE and add it. */ + insn = emit_move_insn (to, to); + REG_NOTES (insn) = gen_rtx (EXPR_LIST, REG_EQUAL, + gen_rtx (UNSIGNED_FIX, GET_MODE (to), + copy_rtx (from)), + REG_NOTES (insn)); + } return; } #endif |