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| author | wehle <wehle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-10-11 03:51:24 +0000 |
|---|---|---|
| committer | wehle <wehle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-10-11 03:51:24 +0000 |
| commit | 228498fe46ce3e03eb5d495d450e60e0d33921e1 (patch) | |
| tree | 57d914a811598a624f337dd3ee4f78fbb3d988ff /gcc/rtlanal.c | |
| parent | 19cb6b50cf92dfd40eb254e53f1a711c5f5e486d (diff) | |
| download | gcc-228498fe46ce3e03eb5d495d450e60e0d33921e1.tar.gz | |
* rtlanal.c (noop_move_p): Insns with a REG_RETVAL note
should not be considered as a no-op.
* flow.c (delete_noop_moves): Handle REG_LIBCALL notes.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@46174 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index ee40d6c7908..9cf879c1377 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -1037,6 +1037,11 @@ noop_move_p (insn) if (find_reg_note (insn, REG_EQUAL, NULL_RTX)) return 0; + /* For now treat an insn with a REG_RETVAL note as a + a special insn which should not be considered a no-op. */ + if (find_reg_note (insn, REG_RETVAL, NULL_RTX)) + return 0; + if (GET_CODE (pat) == SET && set_noop_p (pat)) return 1; |