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| author | ghazi <ghazi@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-09-24 20:44:55 +0000 |
|---|---|---|
| committer | ghazi <ghazi@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-09-24 20:44:55 +0000 |
| commit | 03a7d9e96c2162143894318f0a6a9f48a8adda71 (patch) | |
| tree | 942e85ee11d063e393b8d23171086e6c6108a90e /gcc/tree-complex.c | |
| parent | f8e7cebd1294cf9a424e36027401c4f394a44ccc (diff) | |
| download | gcc-03a7d9e96c2162143894318f0a6a9f48a8adda71.tar.gz | |
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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@152145 138bc75d-0d04-0410-961f-82ee72b054a4
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 f6918056a68..199f1dcf54c 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 |