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| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-12-06 23:59:52 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-12-06 23:59:52 +0000 |
| commit | 4eb376e3a2290c821d2786aaa8459c10b601e6aa (patch) | |
| tree | 5f40c8e021feb3e4a02b64b03edcf7ed051a1c76 /gcc/tree-ssa-dom.c | |
| parent | 0a2849aef7a88bc2429014785d4002ae4d5d4df1 (diff) | |
| download | gcc-4eb376e3a2290c821d2786aaa8459c10b601e6aa.tar.gz | |
PR debug/42234
* tree-ssa-dom.c (degenerate_phi_result): Check for NULL phi
argument earlier.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@155025 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-dom.c')
| -rw-r--r-- | gcc/tree-ssa-dom.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c index dd9fd566785..48f423bec61 100644 --- a/gcc/tree-ssa-dom.c +++ b/gcc/tree-ssa-dom.c @@ -2396,6 +2396,8 @@ degenerate_phi_result (gimple phi) if (arg == lhs) continue; + else if (!arg) + break; else if (!val) val = arg; else if (arg == val) @@ -2403,7 +2405,7 @@ degenerate_phi_result (gimple phi) /* We bring in some of operand_equal_p not only to speed things up, but also to avoid crashing when dereferencing the type of a released SSA name. */ - else if (!arg || TREE_CODE (val) != TREE_CODE (arg) + else if (TREE_CODE (val) != TREE_CODE (arg) || TREE_CODE (val) == SSA_NAME || !operand_equal_p (arg, val, 0)) break; |