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| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-06-30 16:19:11 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-06-30 16:19:11 +0000 |
| commit | 6fa987837c0861b7a44ae427629f5a5920acd3b9 (patch) | |
| tree | 5176e675ace86f9c1b331ce84ab33709cfe7e130 /gcc/cse.c | |
| parent | e26bf699f36d3cea8c05039404e98280bddc389d (diff) | |
| download | gcc-6fa987837c0861b7a44ae427629f5a5920acd3b9.tar.gz | |
* rtl.def (CONSTANT_P_RTX): New.
* rtl.h (CONSTANT_P): Recognize it.
* cse.c (fold_rtx): Eliminate it.
* expr.c (can_handle_constant_p): New variable.
(init_expr_once): Initialize it.
(expand_builtin): Generate CONSTANT_P_RTX if the expression is not
immediately recognizable as a constant.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@20846 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/cse.c')
| -rw-r--r-- | gcc/cse.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/cse.c b/gcc/cse.c index 868b7de3398..bd2aa567d23 100644 --- a/gcc/cse.c +++ b/gcc/cse.c @@ -5715,6 +5715,12 @@ fold_rtx (x, insn) const_arg1 ? const_arg1 : folded_arg1, const_arg2 ? const_arg2 : XEXP (x, 2)); break; + + case 'x': + /* Always eliminate CONSTANT_P_RTX at this stage. */ + if (code == CONSTANT_P_RTX) + return (const_arg0 ? const1_rtx : const0_rtx); + break; } return new ? new : x; |