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| author | Richard Henderson <rth@redhat.com> | 2004-03-02 16:46:06 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2004-03-02 16:46:06 -0800 |
| commit | 27ab3e91289ff7946c6a477de84bddb707d3f74d (patch) | |
| tree | 89c4a2eac8c27b87bff6eb652865b74686befcd2 /gcc/optabs.c | |
| parent | 0b1d67d23b3498243272f751414b157054be4515 (diff) | |
| download | gcc-27ab3e91289ff7946c6a477de84bddb707d3f74d.zip gcc-27ab3e91289ff7946c6a477de84bddb707d3f74d.tar.gz gcc-27ab3e91289ff7946c6a477de84bddb707d3f74d.tar.bz2 | |
re PR middle-end/11767 (different code behaviour with -fnon-call-exceptions -fprofile-arcs)
PR middle-end/11767
* coverage.c (coverage_counter_ref): Set MEM_NOTRAP_P.
* optabs.c (prepare_cmp_insn): Force trapping memories to registers
before the compare, if flag_non_call_exceptions.
* g++.dg/other/profile1.C: New.
From-SVN: r78805
Diffstat (limited to 'gcc/optabs.c')
| -rw-r--r-- | gcc/optabs.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index cf3099b..0826782 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -3650,6 +3650,16 @@ prepare_cmp_insn (rtx *px, rtx *py, enum rtx_code *pcomparison, rtx size, return; } + /* Don't allow operands to the compare to trap, as that can put the + compare and branch in different basic blocks. */ + if (flag_non_call_exceptions) + { + if (may_trap_p (x)) + x = force_reg (mode, x); + if (may_trap_p (y)) + y = force_reg (mode, y); + } + *px = x; *py = y; if (can_compare_p (*pcomparison, mode, purpose)) |