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| author | Adam Nemet <anemet@caviumnetworks.com> | 2006-01-03 05:05:06 +0000 |
|---|---|---|
| committer | Adam Nemet <nemet@gcc.gnu.org> | 2006-01-03 05:05:06 +0000 |
| commit | f13f406e12f237894d8b44632651959863b99dff (patch) | |
| tree | 1b9624afc1f2b260e99b731fadcf5c018503ec90 | |
| parent | 1146e682161b865edd7d440bfe2c7d4f42308dbe (diff) | |
| download | gcc-f13f406e12f237894d8b44632651959863b99dff.zip gcc-f13f406e12f237894d8b44632651959863b99dff.tar.gz gcc-f13f406e12f237894d8b44632651959863b99dff.tar.bz2 | |
combine.c (apply_distributive_law <SUBREG>): Check TRULY_NOOP_TRUNCATION.
* combine.c (apply_distributive_law <SUBREG>): Check
TRULY_NOOP_TRUNCATION.
From-SVN: r109261
| -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 cac2479..1be3f95 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 1361b10..e9bd667 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)), |