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| author | Adam Nemet <anemet@caviumnetworks.com> | 2009-07-18 21:55:40 +0000 |
|---|---|---|
| committer | Adam Nemet <nemet@gcc.gnu.org> | 2009-07-18 21:55:40 +0000 |
| commit | 827f4079406b72fce7b49a29abe60ecb801462d5 (patch) | |
| tree | 31910105b61e164fdc184c5ff130eb63a48de118 /gcc | |
| parent | f3ce108897e16f828b3350ac5c5be9d0ffc622c0 (diff) | |
| download | gcc-827f4079406b72fce7b49a29abe60ecb801462d5.zip gcc-827f4079406b72fce7b49a29abe60ecb801462d5.tar.gz gcc-827f4079406b72fce7b49a29abe60ecb801462d5.tar.bz2 | |
combine.c (make_compound_operation): If force_to_mode re-expanded the compound use gen_lowpart instead to convert to...
* combine.c (make_compound_operation) <SUBREG>: If force_to_mode
re-expanded the compound use gen_lowpart instead to convert to the
desired mode.
testsuite/
* gcc.target/mips/ext-2.c: New test.
From-SVN: r149781
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/combine.c | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/mips/ext-2.c | 14 |
4 files changed, 30 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c087253..8ad42bf 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2009-07-18 Adam Nemet <anemet@caviumnetworks.com> + * combine.c (make_compound_operation) <SUBREG>: If force_to_mode + re-expanded the compound use gen_lowpart instead to convert to the + desired mode. + +2009-07-18 Adam Nemet <anemet@caviumnetworks.com> + * combine.c (try_widen_shift_mode): Add COUNT, OUTER_CODE and OUTER_CONST arguments. <LSHIFTRT>: Use them to allow widening if the bits shifted in from diff --git a/gcc/combine.c b/gcc/combine.c index 39daf28..3f39bc3 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -7061,6 +7061,12 @@ make_compound_operation (rtx x, enum rtx_code in_code) if (GET_CODE (newer) != SUBREG) newer = make_compound_operation (newer, in_code); + /* force_to_mode can expand compounds. If it just re-expanded the + compound use gen_lowpart instead to convert to the desired + mode. */ + if (rtx_equal_p (newer, x)) + return gen_lowpart (GET_MODE (x), tem); + return newer; } diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 3200817..b1f8698 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,9 @@ 2009-07-18 Adam Nemet <anemet@caviumnetworks.com> + * gcc.target/mips/ext-2.c: New test. + +2009-07-18 Adam Nemet <anemet@caviumnetworks.com> + * gcc.target/mips/octeon-exts-7.c: New test. * gcc.target/mips/octeon-exts-2.c: Revert previous change. * gcc.target/mips/octeon-exts-5.c: Likewise. diff --git a/gcc/testsuite/gcc.target/mips/ext-2.c b/gcc/testsuite/gcc.target/mips/ext-2.c new file mode 100644 index 0000000..8d502b2 --- /dev/null +++ b/gcc/testsuite/gcc.target/mips/ext-2.c @@ -0,0 +1,14 @@ +/* Turn the truncate,zero_extend,lshiftrt sequence before the or into a + zero_extract. The truncate is due to TARGET_PROMOTE_PROTOTYPES, the + zero_extend to PROMOTE_MODE. */ +/* { dg-do compile } */ +/* { dg-options "-O isa_rev>=2 -mgp64" } */ +/* { dg-final { scan-assembler "\tdext\t" } } */ +/* { dg-final { scan-assembler-not "and" } } */ +/* { dg-final { scan-assembler-not "srl" } } */ + +void +f (unsigned char x, unsigned char *r) +{ + *r = 0x50 | (x >> 4); +} |