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| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-06-17 00:56:07 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-06-17 00:56:07 +0000 |
| commit | 52966e98d94230ab4d201df34c473141e80f1cca (patch) | |
| tree | 90d35f461b3e1c2cf5dbcd8e239a2a2aeb507817 /gcc/tree-complex.c | |
| parent | c4e602e73fdc694e0821d4e3bc1f542ab09e9e85 (diff) | |
| download | gcc-52966e98d94230ab4d201df34c473141e80f1cca.tar.gz | |
PR tree-opt/22022
* tree-complex.c (update_phi_components): Avoid no-op moves.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@101121 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-complex.c')
| -rw-r--r-- | gcc/tree-complex.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/tree-complex.c b/gcc/tree-complex.c index a4c7329d3dd..a3470b1b7b6 100644 --- a/gcc/tree-complex.c +++ b/gcc/tree-complex.c @@ -577,6 +577,12 @@ update_phi_components (basic_block bb) tree arg = PHI_ARG_DEF (phi, i); tree r, i; + /* Avoid no-op assignments. This also prevents insertting stmts + onto abnormal edges, assuming the PHI isn't already broken. */ + if (TREE_CODE (arg) == SSA_NAME + && SSA_NAME_VAR (arg) == SSA_NAME_VAR (lhs)) + continue; + r = extract_component (NULL, arg, 0, false); i = extract_component (NULL, arg, 1, false); update_complex_components_on_edge (e, NULL, lhs, r, i); |