diff options
| author | Jim Wilson <wilson@gcc.gnu.org> | 1994-09-29 17:31:34 -0700 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1994-09-29 17:31:34 -0700 |
| commit | 63f7136fd89b12e2a76b546474ae5ec88fb1f62a (patch) | |
| tree | 616398ace3755c646e53294910e5bf57088b00fe /gcc | |
| parent | 57cb9b60874ba518f04b3e5592f3c63c03771b06 (diff) | |
| download | gcc-63f7136fd89b12e2a76b546474ae5ec88fb1f62a.zip gcc-63f7136fd89b12e2a76b546474ae5ec88fb1f62a.tar.gz gcc-63f7136fd89b12e2a76b546474ae5ec88fb1f62a.tar.bz2 | |
(movdf+3): Handle overlapping registers in define_split.
From-SVN: r8176
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/sparc/sparc.md | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/gcc/config/sparc/sparc.md b/gcc/config/sparc/sparc.md index 2b68258..8440955 100644 --- a/gcc/config/sparc/sparc.md +++ b/gcc/config/sparc/sparc.md @@ -2039,6 +2039,8 @@ [(set_attr "type" "store,load,move,store,load") (set_attr "length" "1,1,2,3,3")]) +;; Must handle overlapping registers here, since parameters can be unaligned +;; in registers. ;; ??? Do we need a v9 version of this? (define_split [(set (match_operand:DF 0 "register_operand" "") @@ -2047,10 +2049,25 @@ [(set (match_dup 2) (match_dup 3)) (set (match_dup 4) (match_dup 5))] " -{ operands[2] = operand_subword (operands[0], 0, 0, DFmode); - operands[3] = operand_subword (operands[1], 0, 0, DFmode); - operands[4] = operand_subword (operands[0], 1, 0, DFmode); - operands[5] = operand_subword (operands[1], 1, 0, DFmode); }") +{ + rtx first_set = operand_subword (operands[0], 0, 0, DFmode); + rtx second_use = operand_subword (operands[1], 1, 0, DFmode); + + if (REGNO (first_set) == REGNO (second_use)) + { + operands[2] = operand_subword (operands[0], 1, 0, DFmode); + operands[3] = second_use; + operands[4] = first_set; + operands[5] = operand_subword (operands[1], 0, 0, DFmode); + } + else + { + operands[2] = first_set; + operands[3] = operand_subword (operands[1], 0, 0, DFmode); + operands[4] = operand_subword (operands[0], 1, 0, DFmode); + operands[5] = second_use; + } +}") (define_insn "" [(set (mem:DF (match_operand:SI 0 "symbolic_operand" "i,i")) |