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| author | Thomas Koenig <tkoenig@gcc.gnu.org> | 2021-01-03 21:40:04 +0100 |
|---|---|---|
| committer | Thomas Koenig <tkoenig@gcc.gnu.org> | 2021-01-03 21:40:04 +0100 |
| commit | afae4a55ccaa0de95ea11e5f634084db6ab2f444 (patch) | |
| tree | d632cc867d10410ba9fb750523be790b86846ac4 /gcc/tree-ssa-threadedge.c | |
| parent | 9d9a82ec8478ff52c7a9d61f58cd2a7b6295b5f9 (diff) | |
| parent | d2eb616a0f7bea78164912aa438c29fe1ef5774a (diff) | |
| download | gcc-afae4a55ccaa0de95ea11e5f634084db6ab2f444.zip gcc-afae4a55ccaa0de95ea11e5f634084db6ab2f444.tar.gz gcc-afae4a55ccaa0de95ea11e5f634084db6ab2f444.tar.bz2 | |
Merge branch 'master' into devel/coarray_native
Diffstat (limited to 'gcc/tree-ssa-threadedge.c')
| -rw-r--r-- | gcc/tree-ssa-threadedge.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/tree-ssa-threadedge.c b/gcc/tree-ssa-threadedge.c index f43d581..32d63a9 100644 --- a/gcc/tree-ssa-threadedge.c +++ b/gcc/tree-ssa-threadedge.c @@ -265,6 +265,12 @@ record_temporary_equivalences_from_stmts_at_dest (edge e, && gimple_call_internal_unique_p (stmt)) return NULL; + /* We cannot thread through __builtin_constant_p, because an + expression that is constant on two threading paths may become + non-constant (i.e.: phi) when they merge. */ + if (gimple_call_builtin_p (stmt, BUILT_IN_CONSTANT_P)) + return NULL; + /* If duplicating this block is going to cause too much code expansion, then do not thread through this block. */ stmt_count++; |