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| author | Jakub Jelinek <jakub@redhat.com> | 2012-02-13 11:37:35 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2012-02-13 11:37:35 +0100 |
| commit | 205ec405fc77c42a21ba12927a23985bf7176e58 (patch) | |
| tree | ed8769515c0c91e62b83378f6bd7d0b723a42c68 /gcc | |
| parent | 5ac5049603ea4650a07166ee09a6b3c2ae0a01d8 (diff) | |
| download | gcc-205ec405fc77c42a21ba12927a23985bf7176e58.zip gcc-205ec405fc77c42a21ba12927a23985bf7176e58.tar.gz gcc-205ec405fc77c42a21ba12927a23985bf7176e58.tar.bz2 | |
re PR middle-end/52209 (wrong code at -O0)
PR middle-end/52209
* expr.c (expand_expr_real_2) <case BIT_NOT_EXPR>: Only expand using
XOR for reduce_bit_field if type is unsigned.
* gcc.c-torture/execute/pr52209.c: New test.
From-SVN: r184151
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/expr.c | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/pr52209.c | 14 |
4 files changed, 28 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1a97108..549af73 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2012-02-13 Jakub Jelinek <jakub@redhat.com> + + PR middle-end/52209 + * expr.c (expand_expr_real_2) <case BIT_NOT_EXPR>: Only expand using + XOR for reduce_bit_field if type is unsigned. + 2012-02-12 Eric Botcazou <ebotcazou@adacore.com> * config/sparc/sparc.h (CANNOT_CHANGE_MODE_CLASS): In 64-bit mode, @@ -8600,8 +8600,9 @@ expand_expr_real_2 (sepops ops, rtx target, enum machine_mode tmode, if (modifier == EXPAND_STACK_PARM) target = 0; /* In case we have to reduce the result to bitfield precision - expand this as XOR with a proper constant instead. */ - if (reduce_bit_field) + for unsigned bitfield expand this as XOR with a proper constant + instead. */ + if (reduce_bit_field && TYPE_UNSIGNED (type)) temp = expand_binop (mode, xor_optab, op0, immed_double_int_const (double_int_mask (TYPE_PRECISION (type)), mode), diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 66abdd0..e75cc5e 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2012-02-13 Jakub Jelinek <jakub@redhat.com> + + PR middle-end/52209 + * gcc.c-torture/execute/pr52209.c: New test. + 2012-02-12 Mikael Morin <mikael@gcc.gnu.org> PR fortran/50981 diff --git a/gcc/testsuite/gcc.c-torture/execute/pr52209.c b/gcc/testsuite/gcc.c-torture/execute/pr52209.c new file mode 100644 index 0000000..f1d5b1f --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/pr52209.c @@ -0,0 +1,14 @@ +/* PR middle-end/52209 */ + +extern void abort (void); +struct S0 { int f2 : 1; } c; +int b; + +int +main () +{ + b = -1 ^ c.f2; + if (b != -1) + abort (); + return 0; +} |