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| author | Richard Kenner <kenner@vlsi1.ultra.nyu.edu> | 2001-01-20 17:47:45 +0000 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 2001-01-20 12:47:45 -0500 |
| commit | 2954d7dbf7d309d5b5c8fc2a32dae155936ee264 (patch) | |
| tree | d266c733475e09758d1260c90b41f1c6bf07614a /gcc | |
| parent | 1d26ac96cc832057ed835b238ca35dfdb930762f (diff) | |
| download | gcc-2954d7dbf7d309d5b5c8fc2a32dae155936ee264.zip gcc-2954d7dbf7d309d5b5c8fc2a32dae155936ee264.tar.gz gcc-2954d7dbf7d309d5b5c8fc2a32dae155936ee264.tar.bz2 | |
stmt.c (expand_return): Don't return anything if size is zero.
* stmt.c (expand_return): Don't return anything if size is zero.
Delete redundant assignment to BYTES.
* expr.c (move_block_from_reg): Do nothing if NREGS is zero.
From-SVN: r39156
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/expr.c | 3 | ||||
| -rw-r--r-- | gcc/stmt.c | 15 |
3 files changed, 18 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index cded5b2..3cff034 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +Sat Jan 20 12:46:57 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu> + + * stmt.c (expand_return): Don't return anything if size is zero. + Delete redundant assignment to BYTES. + * expr.c (move_block_from_reg): Do nothing if NREGS is zero. + 2001-01-20 Marek Michalkiewicz <marekm@linux.org.pl> * config/avr/avr.h (INIT_TARGET_OPTABS): Remove most of it, was @@ -1857,6 +1857,9 @@ move_block_from_reg (regno, x, nregs, size) #endif enum machine_mode mode; + if (nregs == 0) + return; + /* If SIZE is that of a mode no bigger than a word, just use that mode's store operation. */ if (size <= UNITS_PER_WORD @@ -3016,6 +3016,12 @@ expand_return (retval) rtx result_val = expand_expr (retval_rhs, NULL_RTX, VOIDmode, 0); enum machine_mode tmpmode, result_reg_mode; + if (bytes == 0) + { + expand_null_return (); + return; + } + /* Structures whose size is not a multiple of a word are aligned to the least significant byte (to the right). On a BYTES_BIG_ENDIAN machine, this means we must skip the empty high order bytes when @@ -3063,15 +3069,12 @@ expand_return (retval) /* Find the smallest integer mode large enough to hold the entire structure and use that mode instead of BLKmode on the USE insn for the return register. */ - bytes = int_size_in_bytes (TREE_TYPE (retval_rhs)); for (tmpmode = GET_CLASS_NARROWEST_MODE (MODE_INT); tmpmode != VOIDmode; tmpmode = GET_MODE_WIDER_MODE (tmpmode)) - { - /* Have we found a large enough mode? */ - if (GET_MODE_SIZE (tmpmode) >= bytes) - break; - } + /* Have we found a large enough mode? */ + if (GET_MODE_SIZE (tmpmode) >= bytes) + break; /* No suitable mode found. */ if (tmpmode == VOIDmode) |