From 98369a0f8ac63ad3d76e8f9a55b282182d42a10f Mon Sep 17 00:00:00 2001 From: Richard Kenner Date: Wed, 26 Jul 1995 09:31:00 -0400 Subject: [PATCH] (cse_insn): When do special handling for (set REG0 REG1), must delete REG_EQUAL note from insn if it mentions REG0. From-SVN: r10169 --- gcc/cse.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/gcc/cse.c b/gcc/cse.c index 1b302f5e92f..3c5ba6fae00 100644 --- a/gcc/cse.c +++ b/gcc/cse.c @@ -7417,6 +7417,12 @@ cse_insn (insn, in_libcall_block) XEXP (note, 1) = REG_NOTES (prev); REG_NOTES (prev) = note; } + + /* If INSN has a REG_EQUAL note, and this note mentions REG0, + then we must delete it, because the value in REG0 has changed. */ + note = find_reg_note (insn, REG_EQUAL, NULL_RTX); + if (note && reg_mentioned_p (dest, XEXP (note, 0))) + remove_note (insn, note); } } -- 2.30.2