From 3e25353ee782062cd488c4dc0382096e2276c17a Mon Sep 17 00:00:00 2001 From: Andrew Haley Date: Tue, 10 Dec 2002 16:35:37 +0000 Subject: [PATCH] cse.c (cse_insn): Don't cse past a basic block boundary. 2002-12-10 Andrew Haley * cse.c (cse_insn): Don't cse past a basic block boundary. From-SVN: r60000 --- gcc/ChangeLog | 4 ++++ gcc/cse.c | 12 ++++++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 91f44af8ec1..d3ed606e61d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2002-12-10 Andrew Haley + + * cse.c (cse_insn): Don't cse past a basic block boundary. + 2002-12-10 Jakub Jelinek * config/linux.h (LIB_SPEC): If -pthread, add -lpthread even if diff --git a/gcc/cse.c b/gcc/cse.c index 9688204c466..1d606b60c13 100644 --- a/gcc/cse.c +++ b/gcc/cse.c @@ -6316,8 +6316,16 @@ cse_insn (insn, libcall_insn) if ((src_ent->first_reg == REGNO (SET_DEST (sets[0].rtl))) && ! find_reg_note (insn, REG_RETVAL, NULL_RTX)) { - rtx prev = prev_nonnote_insn (insn); - + rtx prev = insn; + /* Scan for the previous nonnote insn, but stop at a basic + block boundary. */ + do + { + prev = PREV_INSN (prev); + } + while (prev && GET_CODE (prev) == NOTE + && NOTE_LINE_NUMBER (prev) != NOTE_INSN_BASIC_BLOCK); + /* Do not swap the registers around if the previous instruction attaches a REG_EQUIV note to REG1.