From: Franz Sirl Date: Mon, 14 Jul 2003 09:29:44 +0000 (+0000) Subject: re PR rtl-optimization/11440 (gcc-3.3.1 miscompiles c++ code with -O2, -fno-gcse... X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bbd288a44df5e39c05583b77349b436eb3fcc866;p=gcc.git re PR rtl-optimization/11440 (gcc-3.3.1 miscompiles c++ code with -O2, -fno-gcse cures it) 2003-07-14 Franz Sirl PR optimization/11440 * gcse.c (try_replace_reg): Don't attach notes to ZERO_EXTRACT or SIGN_EXTRACT SETs. From-SVN: r69325 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 510d74fbd9b..3368f568939 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2003-07-14 Franz Sirl + + PR optimization/11440 + * gcse.c (try_replace_reg): Don't attach notes to ZERO_EXTRACT or + SIGN_EXTRACT SETs. + 2003-07-14 Alan Modra * doc/tm.texi (BLOCK_REG_PADDING): Describe. diff --git a/gcc/gcse.c b/gcc/gcse.c index 8ddcd73621e..30d4c1ee171 100644 --- a/gcc/gcse.c +++ b/gcc/gcse.c @@ -3856,9 +3856,12 @@ try_replace_reg (rtx from, rtx to, rtx insn) && validate_change (insn, &SET_SRC (set), src, 0)) success = 1; - /* If we've failed to do replacement, have a single SET, and don't already - have a note, add a REG_EQUAL note to not lose information. */ - if (!success && note == 0 && set != 0) + /* If we've failed to do replacement, have a single SET, don't already + have a note, and have no special SET, add a REG_EQUAL note to not + lose information. */ + if (!success && note == 0 && set != 0 + && GET_CODE (XEXP (set, 0)) != ZERO_EXTRACT + && GET_CODE (XEXP (set, 0)) != SIGN_EXTRACT) note = set_unique_reg_note (insn, REG_EQUAL, copy_rtx (src)); }