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| author | Richard Kenner <kenner@gcc.gnu.org> | 1997-06-09 09:19:15 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1997-06-09 09:19:15 -0400 |
| commit | b88c92ccb2bd49a12ce31432a36a42bec4a9b8bd (patch) | |
| tree | e572f320b17b185307493fa2f8668bf6d98d9abe /gcc/final.c | |
| parent | f9dcab5273c6957efd1249ab66bbb63ef86edf38 (diff) | |
| download | gcc-b88c92ccb2bd49a12ce31432a36a42bec4a9b8bd.zip gcc-b88c92ccb2bd49a12ce31432a36a42bec4a9b8bd.tar.gz gcc-b88c92ccb2bd49a12ce31432a36a42bec4a9b8bd.tar.bz2 | |
(final_scan_insn): Use single_set to check cc_status.flags.
From-SVN: r14177
Diffstat (limited to 'gcc/final.c')
| -rw-r--r-- | gcc/final.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/gcc/final.c b/gcc/final.c index be46e06..91ad498 100644 --- a/gcc/final.c +++ b/gcc/final.c @@ -1651,7 +1651,7 @@ final_scan_insn (insn, file, optimize, prescan, nopeepholes) default: { - register rtx body = PATTERN (insn); + register rtx body = PATTERN (insn), set; int insn_code_number; char *template; rtx note; @@ -1853,6 +1853,8 @@ final_scan_insn (insn, file, optimize, prescan, nopeepholes) body = PATTERN (insn); #ifdef HAVE_cc0 + set = single_set(insn); + /* Check for redundant test and compare instructions (when the condition codes are already set up as desired). This is done only when optimizing; if not optimizing, @@ -1863,7 +1865,9 @@ final_scan_insn (insn, file, optimize, prescan, nopeepholes) if (optimize) { +#if 0 rtx set = single_set(insn); +#endif if (set && GET_CODE (SET_DEST (set)) == CC0 @@ -1978,20 +1982,20 @@ final_scan_insn (insn, file, optimize, prescan, nopeepholes) handle conditional moves (if this machine has either one). */ if (cc_status.flags != 0 - && GET_CODE (body) == SET) + && set != 0) { rtx cond_rtx, then_rtx, else_rtx; if (GET_CODE (insn) != JUMP_INSN - && GET_CODE (SET_SRC (body)) == IF_THEN_ELSE) + && GET_CODE (SET_SRC (set)) == IF_THEN_ELSE) { - cond_rtx = XEXP (SET_SRC (body), 0); - then_rtx = XEXP (SET_SRC (body), 1); - else_rtx = XEXP (SET_SRC (body), 2); + cond_rtx = XEXP (SET_SRC (set), 0); + then_rtx = XEXP (SET_SRC (set), 1); + else_rtx = XEXP (SET_SRC (set), 2); } else { - cond_rtx = SET_SRC (body); + cond_rtx = SET_SRC (set); then_rtx = const_true_rtx; else_rtx = const0_rtx; } @@ -2014,12 +2018,12 @@ final_scan_insn (insn, file, optimize, prescan, nopeepholes) break; result = alter_cond (cond_rtx); if (result == 1) - validate_change (insn, &SET_SRC (body), then_rtx, 0); + validate_change (insn, &SET_SRC (set), then_rtx, 0); else if (result == -1) - validate_change (insn, &SET_SRC (body), else_rtx, 0); + validate_change (insn, &SET_SRC (set), else_rtx, 0); else if (result == 2) INSN_CODE (insn) = -1; - if (SET_DEST (body) == SET_SRC (body)) + if (SET_DEST (set) == SET_SRC (set)) { PUT_CODE (insn, NOTE); NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED; |