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| author | Jing Yu <jingyu@google.com> | 2010-01-15 21:54:01 +0000 |
|---|---|---|
| committer | Jing Yu <jingyu@gcc.gnu.org> | 2010-01-15 21:54:01 +0000 |
| commit | 4a62494df2d37fc03d1778fd69064dc6cd2dc0b9 (patch) | |
| tree | 58ebeac6f70fabacbde6abba8c1de445738f945e | |
| parent | 5a869057b49f37060b718042d5131e4f8d2da802 (diff) | |
| download | gcc-4a62494df2d37fc03d1778fd69064dc6cd2dc0b9.zip gcc-4a62494df2d37fc03d1778fd69064dc6cd2dc0b9.tar.gz gcc-4a62494df2d37fc03d1778fd69064dc6cd2dc0b9.tar.bz2 | |
re PR rtl-optimization/42691 (problematic REG_EQUAL note added to SUBREG)
2010-01-15 Jing Yu <jingyu@google.com>
PR rtl-optimization/42691
* combine.c (try_combine): Set changed_i3_dest to 1 when I2 and I3 set
a pseudo to a constant and are merged, and adjust comments.
2010-01-15 Jing Yu <jingyu@google.com>
PR rtl-optimization/42691
* gcc.c-torture/execute/pr42691.c: New.
From-SVN: r155948
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/combine.c | 8 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/pr42691.c | 41 |
4 files changed, 58 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 80151a7..f1f6e5c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2010-01-15 Jing Yu <jingyu@google.com> + + PR rtl-optimization/42691 + * combine.c (try_combine): Set changed_i3_dest to 1 when I2 and I3 set + a pseudo to a constant and are merged, and adjust comments. + 2010-01-15 Eric Botcazou <ebotcazou@adacore.com> * config/i386/sse.md (avx_vperm2f128<mode>3): Fix typo. diff --git a/gcc/combine.c b/gcc/combine.c index 5ae557c..e5d4c5a 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2663,10 +2663,16 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p) i2dest = SET_DEST (temp); i2dest_killed = dead_or_set_p (i2, i2dest); + /* Replace the source in I2 with the new constant and make the + resulting insn the new pattern for I3. Then skip to where we + validate the pattern. Everything was set up above. */ SUBST (SET_SRC (temp), immed_double_const (olo, ohi, GET_MODE (SET_DEST (temp)))); newpat = PATTERN (i2); + + /* The dest of I3 has been replaced with the dest of I2. */ + changed_i3_dest = 1; goto validate_replacement; } } @@ -3038,8 +3044,6 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p) } } - /* We come here when we are replacing a destination in I2 with the - destination of I3. */ validate_replacement: /* Note which hard regs this insn has as inputs. */ diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 990ea36..89469ad 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2010-01-15 Jing Yu <jingyu@google.com> + + PR rtl-optimization/42691 + * gcc.c-torture/execute/pr42691.c: New. + 2010-01-15 Richard Guenther <rguenther@suse.de> PR middle-end/42739 diff --git a/gcc/testsuite/gcc.c-torture/execute/pr42691.c b/gcc/testsuite/gcc.c-torture/execute/pr42691.c new file mode 100644 index 0000000..7eeee99 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/pr42691.c @@ -0,0 +1,41 @@ +extern void abort (void); + +union _D_rep +{ + unsigned short rep[4]; + double val; +}; + +int add(double* key, double* table) +{ + unsigned i = 0; + double* deletedEntry = 0; + while (1) { + double* entry = table + i; + + if (*entry == *key) + break; + + union _D_rep _D_inf = {{ 0, 0, 0, 0x7ff0 }}; + if (*entry != _D_inf.val) + abort (); + + union _D_rep _D_inf2 = {{ 0, 0, 0, 0x7ff0 }}; + if (!_D_inf2.val) + deletedEntry = entry; + + i++; + } + if (deletedEntry) + *deletedEntry = 0.0; + return 0; +} + +int main () +{ + union _D_rep infinit = {{ 0, 0, 0, 0x7ff0 }}; + double table[2] = { infinit.val, 23 }; + double key = 23; + int ret = add (&key, table); + return ret; +} |