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| author | Kaveh R. Ghazi <ghazi@caip.rutgers.edu> | 2009-09-24 20:44:55 +0000 |
|---|---|---|
| committer | Kaveh Ghazi <ghazi@gcc.gnu.org> | 2009-09-24 20:44:55 +0000 |
| commit | e3d5405d071e33540d70c62c6e24a2dfa7cc7d9d (patch) | |
| tree | 942e85ee11d063e393b8d23171086e6c6108a90e /gcc/tree-complex.c | |
| parent | 18b802688624127aa26b3d75dd0ce41e06cbeee9 (diff) | |
| download | gcc-e3d5405d071e33540d70c62c6e24a2dfa7cc7d9d.zip gcc-e3d5405d071e33540d70c62c6e24a2dfa7cc7d9d.tar.gz gcc-e3d5405d071e33540d70c62c6e24a2dfa7cc7d9d.tar.bz2 | |
re PR middle-end/41435 (GCC doesn't fold complex int division)
PR middle-end/41435
* fold-const.c (const_binop): Handle complex int division.
* tree-complex.c (expand_complex_div_straight,
expand_complex_div_wide): Update comments.
testsuite:
* gcc.dg/torture/builtin-math-7.c: Test complex int division at
compile-time.
From-SVN: r152145
Diffstat (limited to 'gcc/tree-complex.c')
| -rw-r--r-- | gcc/tree-complex.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc/tree-complex.c b/gcc/tree-complex.c index f691805..199f1dcf 100644 --- a/gcc/tree-complex.c +++ b/gcc/tree-complex.c @@ -1065,7 +1065,9 @@ expand_complex_multiplication (gimple_stmt_iterator *gsi, tree inner_type, update_complex_assignment (gsi, rr, ri); } -/* Expand complex division to scalars, straightforward algorithm. +/* Keep this algorithm in sync with fold-const.c:const_binop(). + + Expand complex division to scalars, straightforward algorithm. a / b = ((ar*br + ai*bi)/t) + i((ai*br - ar*bi)/t) t = br*br + bi*bi */ @@ -1094,7 +1096,9 @@ expand_complex_div_straight (gimple_stmt_iterator *gsi, tree inner_type, update_complex_assignment (gsi, rr, ri); } -/* Expand complex division to scalars, modified algorithm to minimize +/* Keep this algorithm in sync with fold-const.c:const_binop(). + + Expand complex division to scalars, modified algorithm to minimize overflow with wide input ranges. */ static void |