diff options
| author | nemet <nemet@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-01-03 05:05:06 +0000 |
|---|---|---|
| committer | nemet <nemet@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-01-03 05:05:06 +0000 |
| commit | db87f8200d54ef230646fdcc3e80bb9b9508b4ee (patch) | |
| tree | 1b9624afc1f2b260e99b731fadcf5c018503ec90 | |
| parent | dae1861fbf49f08b1bfee665a89c01d4e593918c (diff) | |
| download | ppe42-gcc-db87f8200d54ef230646fdcc3e80bb9b9508b4ee.tar.gz ppe42-gcc-db87f8200d54ef230646fdcc3e80bb9b9508b4ee.zip | |
* combine.c (apply_distributive_law <SUBREG>): Check
TRULY_NOOP_TRUNCATION.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@109261 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/combine.c | 7 |
2 files changed, 11 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index cac24795603..1be3f95da3f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2006-01-02 Adam Nemet <anemet@caviumnetworks.com> + + * combine.c (apply_distributive_law <SUBREG>): Check + TRULY_NOOP_TRUNCATION. + 2006-01-02 Geoffrey Keating <geoffk@apple.com> * dwarf2out.c (have_switched_text_section): Delete. diff --git a/gcc/combine.c b/gcc/combine.c index 1361b10d27c..e9bd6676792 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -7798,7 +7798,12 @@ apply_distributive_law (rtx x) || (GET_MODE_SIZE (GET_MODE (lhs)) > GET_MODE_SIZE (GET_MODE (SUBREG_REG (lhs)))) || VECTOR_MODE_P (GET_MODE (lhs)) - || GET_MODE_SIZE (GET_MODE (SUBREG_REG (lhs))) > UNITS_PER_WORD) + || GET_MODE_SIZE (GET_MODE (SUBREG_REG (lhs))) > UNITS_PER_WORD + /* Result might need to be truncated. Don't change mode if + explicit truncation is needed. */ + || !TRULY_NOOP_TRUNCATION + (GET_MODE_BITSIZE (GET_MODE (x)), + GET_MODE_BITSIZE (GET_MODE (SUBREG_REG (lhs))))) return x; tem = simplify_gen_binary (code, GET_MODE (SUBREG_REG (lhs)), |
