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| author | Richard Kenner <kenner@gcc.gnu.org> | 1994-07-01 19:25:58 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1994-07-01 19:25:58 -0400 |
| commit | 8743ede9fbe9b575a953459f21852dd3cf85bbc0 (patch) | |
| tree | e6168fbaba495cd137e3a4f565ffb23ac42ca948 | |
| parent | a78bdb8ef83adab0b35e08b7230d53768102e1b2 (diff) | |
| download | gcc-8743ede9fbe9b575a953459f21852dd3cf85bbc0.zip gcc-8743ede9fbe9b575a953459f21852dd3cf85bbc0.tar.gz gcc-8743ede9fbe9b575a953459f21852dd3cf85bbc0.tar.bz2 | |
(jump_optimize): Don't convert if (foo) x++ into an add of an scc
unless X has no side effects and can't trap.
From-SVN: r7638
| -rw-r--r-- | gcc/jump.c | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -1248,6 +1248,8 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan) && (XEXP (SET_SRC (temp1), 1) == const1_rtx || XEXP (SET_SRC (temp1), 1) == constm1_rtx) && rtx_equal_p (temp2, XEXP (SET_SRC (temp1), 0)) + && ! side_effects_p (temp2) + && ! may_trap_p (temp2) /* INSN must either branch to the insn after TEMP or the insn after TEMP must branch to the same place as INSN. */ && (reallabelprev == temp |