diff options
Diffstat (limited to 'gcc/reg-notes.def')
| -rw-r--r-- | gcc/reg-notes.def | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/reg-notes.def b/gcc/reg-notes.def index 36953242e29..eaf04168f5f 100644 --- a/gcc/reg-notes.def +++ b/gcc/reg-notes.def @@ -52,7 +52,9 @@ REG_NOTE (EQUIV) /* Like REG_EQUIV except that the destination is only momentarily equal to the specified rtx. Therefore, it cannot be used for - substitution; but it can be used for cse. */ + substitution; but it can be used for cse. Together with a + REG_RETVAL note, it means that the insn sets the full contents of + the libcall value. */ REG_NOTE (EQUAL) /* This insn copies the return-value of a library call out of the hard |