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| author | Joseph Myers <joseph@codesourcery.com> | 2009-05-08 11:22:08 +0100 |
|---|---|---|
| committer | Joseph Myers <jsm28@gcc.gnu.org> | 2009-05-08 11:22:08 +0100 |
| commit | 2ca862e9dd939d7dd686b771f401012fb9ed9bfe (patch) | |
| tree | 0d1b08d95e3e4458bfdcc780995e149747769e39 /gcc/tree-complex.c | |
| parent | cb8e4445ef25e1da025712d0595274b297b78ec1 (diff) | |
| download | gcc-2ca862e9dd939d7dd686b771f401012fb9ed9bfe.zip gcc-2ca862e9dd939d7dd686b771f401012fb9ed9bfe.tar.gz gcc-2ca862e9dd939d7dd686b771f401012fb9ed9bfe.tar.bz2 | |
re PR c/24581 (Complex arithmetic on special cases is incorrect.)
PR c/24581
* c-typeck.c (build_binary_op): Handle arithmetic between one real
and one complex operand specially.
* tree-complex.c (some_nonzerop): Do not identify a real value as
zero if flag_signed_zeros.
testsuite:
* gcc.dg/torture/complex-sign.h: New header.
* gcc.dg/torture/complex-sign-add.c,
gcc.dg/torture/complex-sign-mixed-add.c,
gcc.dg/torture/complex-sign-mixed-div.c,
gcc.dg/torture/complex-sign-mixed-mul.c,
gcc.dg/torture/complex-sign-mixed-sub.c,
gcc.dg/torture/complex-sign-mul.c,
gcc.dg/torture/complex-sign-sub.c: New tests.
From-SVN: r147281
Diffstat (limited to 'gcc/tree-complex.c')
| -rw-r--r-- | gcc/tree-complex.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/tree-complex.c b/gcc/tree-complex.c index 7dbc63a..2835220 100644 --- a/gcc/tree-complex.c +++ b/gcc/tree-complex.c @@ -99,7 +99,10 @@ some_nonzerop (tree t) { int zerop = false; - if (TREE_CODE (t) == REAL_CST) + /* Operations with real or imaginary part of a complex number zero + cannot be treated the same as operations with a real or imaginary + operand if we care about the signs of zeros in the result. */ + if (TREE_CODE (t) == REAL_CST && !flag_signed_zeros) zerop = REAL_VALUES_IDENTICAL (TREE_REAL_CST (t), dconst0); else if (TREE_CODE (t) == FIXED_CST) zerop = fixed_zerop (t); |