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| author | Ben Cheng <bccheng@google.com> | 2014-05-17 17:03:43 -0700 |
|---|---|---|
| committer | Ben Cheng <bccheng@google.com> | 2014-05-17 17:12:35 -0700 |
| commit | 8c493ead6366b552adee796de296936b78f34c5a (patch) | |
| tree | 4936e52fb9b84edbcd9293bd321027413d1835bf /gcc-4.9/gcc/tree-tailcall.c | |
| parent | 9750bde7e561731ce8a07cdbd0165a688e74a696 (diff) | |
| download | toolchain_gcc-8c493ead6366b552adee796de296936b78f34c5a.tar.gz toolchain_gcc-8c493ead6366b552adee796de296936b78f34c5a.tar.bz2 toolchain_gcc-8c493ead6366b552adee796de296936b78f34c5a.zip | |
[4.9] Refresh GCC 4.9 to the 20140514 snapshot.
For critical bug fixes including devirtualization and codegen.
Change-Id: I8138d3dc408fc12db5eecb01d2753d39219712f2
Diffstat (limited to 'gcc-4.9/gcc/tree-tailcall.c')
| -rw-r--r-- | gcc-4.9/gcc/tree-tailcall.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/gcc-4.9/gcc/tree-tailcall.c b/gcc-4.9/gcc/tree-tailcall.c index 3488c2fc2..02086317b 100644 --- a/gcc-4.9/gcc/tree-tailcall.c +++ b/gcc-4.9/gcc/tree-tailcall.c @@ -285,9 +285,19 @@ process_assignment (gimple stmt, gimple_stmt_iterator call, tree *m, { /* Reject a tailcall if the type conversion might need additional code. */ - if (gimple_assign_cast_p (stmt) - && TYPE_MODE (TREE_TYPE (dest)) != TYPE_MODE (TREE_TYPE (src_var))) - return false; + if (gimple_assign_cast_p (stmt)) + { + if (TYPE_MODE (TREE_TYPE (dest)) != TYPE_MODE (TREE_TYPE (src_var))) + return false; + + /* Even if the type modes are the same, if the precision of the + type is smaller than mode's precision, + reduce_to_bit_field_precision would generate additional code. */ + if (INTEGRAL_TYPE_P (TREE_TYPE (dest)) + && (GET_MODE_PRECISION (TYPE_MODE (TREE_TYPE (dest))) + > TYPE_PRECISION (TREE_TYPE (dest)))) + return false; + } if (src_var != *ass_var) return false; |