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| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/reload.c | 17 |
2 files changed, 22 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e1464af..ee3047b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2002-01-13 Richard Henderson <rth@redhat.com> + + * reload.c (find_reloads): Use a hard reg destination as reload reg + for an input reload of the source. + 2002-01-13 Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at> * doc/install.texi (Binaries): Make link to ftp.writtenword.com diff --git a/gcc/reload.c b/gcc/reload.c index 3996050..8f82c93 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -4241,6 +4241,23 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p) rld[i].nregs = CLASS_MAX_NREGS (rld[i].class, rld[i].mode); } + /* Special case a simple move with an input reload and a + destination of a hard reg, if the hard reg is ok, use it. */ + for (i = 0; i < n_reloads; i++) + if (rld[i].when_needed == RELOAD_FOR_INPUT + && GET_CODE (PATTERN (insn)) == SET + && GET_CODE (SET_DEST (PATTERN (insn))) == REG + && SET_SRC (PATTERN (insn)) == rld[i].in) + { + rtx dest = SET_DEST (PATTERN (insn)); + unsigned int regno = REGNO (dest); + + if (regno < FIRST_PSEUDO_REGISTER + && TEST_HARD_REG_BIT (reg_class_contents[rld[i].class], regno) + && HARD_REGNO_MODE_OK (regno, rld[i].mode)) + rld[i].reg_rtx = dest; + } + return retval; } |