diff options
| author | aoliva <aoliva@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-01-05 20:30:40 +0000 |
|---|---|---|
| committer | aoliva <aoliva@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-01-05 20:30:40 +0000 |
| commit | 60cb217d0a5f389aff93d2cfa3fc75a3e18d2f9d (patch) | |
| tree | cd3bd6b19e670bfdf72cd1a246f86955d72cf95f /gcc/config/sh/sh.md | |
| parent | af295e6f6733b1a9650652f64f0d5cff91cba911 (diff) | |
| download | gcc-60cb217d0a5f389aff93d2cfa3fc75a3e18d2f9d.tar.gz | |
* config/sh/sh.md (movdf): When splitting load into pair of
registers, don't clobber the register used in the address too
early.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@38722 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/sh/sh.md')
| -rw-r--r-- | gcc/config/sh/sh.md | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md index c40f7596f38..cd8c6d04f94 100644 --- a/gcc/config/sh/sh.md +++ b/gcc/config/sh/sh.md @@ -2745,15 +2745,29 @@ offset = 4; mem = copy_rtx (mem); PUT_MODE (mem, SImode); - word0 = gen_rtx(SUBREG, SImode, regop, 0); - emit_insn (store_p - ? gen_movsi_ie (mem, word0) : gen_movsi_ie (word0, mem)); - emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (offset))); - mem = copy_rtx (mem); - word1 = gen_rtx(SUBREG, SImode, regop, 1); - emit_insn (store_p - ? gen_movsi_ie (mem, word1) : gen_movsi_ie (word1, mem)); - emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (-offset))); + word0 = alter_subreg (gen_rtx (SUBREG, SImode, regop, 0)); + word1 = alter_subreg (gen_rtx (SUBREG, SImode, regop, 1)); + if (store_p || ! refers_to_regno_p (REGNO (word0), + REGNO (word0) + 1, addr, 0)) + { + emit_insn (store_p + ? gen_movsi_ie (mem, word0) + : gen_movsi_ie (word0, mem)); + emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (offset))); + mem = copy_rtx (mem); + emit_insn (store_p + ? gen_movsi_ie (mem, word1) + : gen_movsi_ie (word1, mem)); + emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (-offset))); + } + else + { + emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (offset))); + emit_insn (gen_movsi_ie (word1, mem)); + emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (-offset))); + mem = copy_rtx (mem); + emit_insn (gen_movsi_ie (word0, mem)); + } DONE; } } |