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| author | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-10-30 00:56:59 +0000 |
|---|---|---|
| committer | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-10-30 00:56:59 +0000 |
| commit | 9913d3a4c47a5b8371e30de43112f932aaba359c (patch) | |
| tree | 3e72bc5f754672ecac841d4642054de785714fa0 /gcc/gcse.c | |
| parent | 9b8b68276179a5f081c2d0b5b83cff8c0438c1a7 (diff) | |
| download | gcc-9913d3a4c47a5b8371e30de43112f932aaba359c.tar.gz | |
PR rtl-optimization/17581
* cselib.c (cselib_process_insn): The last instruction of a libcall
block, with the REG_RETVAL note, should be considered in the libcall.
* gcse.c (do_local_cprop): Allow constants to be propagated outside
of libcall blocks.
(adjust_libcall_notes): Use simplify_replace_rtx instead of
replace_rtx to avoid creating invalid RTL in REG_RETVAL notes.
* gcc.dg/pr17581-1.c: New test case.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@89873 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/gcse.c b/gcc/gcse.c index f1e1b0aa85f..f277801bced 100644 --- a/gcc/gcse.c +++ b/gcc/gcse.c @@ -3134,7 +3134,8 @@ do_local_cprop (rtx x, rtx insn, int alter_jumps, rtx *libcall_sp) rtx this_rtx = l->loc; rtx note; - if (l->in_libcall) + /* Don't CSE non-constant values out of libcall blocks. */ + if (l->in_libcall && ! CONSTANT_P (this_rtx)) continue; if (gcse_constant_p (this_rtx)) @@ -3222,7 +3223,7 @@ adjust_libcall_notes (rtx oldreg, rtx newval, rtx insn, rtx *libcall_sp) return true; } } - XEXP (note, 0) = replace_rtx (XEXP (note, 0), oldreg, newval); + XEXP (note, 0) = simplify_replace_rtx (XEXP (note, 0), oldreg, newval); insn = end; } return true; |