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| author | tege <tege@138bc75d-0d04-0410-961f-82ee72b054a4> | 1996-08-14 23:46:53 +0000 |
|---|---|---|
| committer | tege <tege@138bc75d-0d04-0410-961f-82ee72b054a4> | 1996-08-14 23:46:53 +0000 |
| commit | 984c9abdf96eb065cbb434b608f190a910a7cd21 (patch) | |
| tree | 15de8732d22332b6f4cd644eccab9d9afc2b7832 /gcc/stmt.c | |
| parent | ac5850cf01205bb2695988dc3d76f7db18fe14a3 (diff) | |
| download | gcc-984c9abdf96eb065cbb434b608f190a910a7cd21.tar.gz | |
(expand_return): In code for doing scc with jumps,
stick to default handling if we have corresponding scc pattern.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@12641 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/stmt.c')
| -rw-r--r-- | gcc/stmt.c | 38 |
1 files changed, 30 insertions, 8 deletions
diff --git a/gcc/stmt.c b/gcc/stmt.c index 080b1e4466e..5ebadb5f21c 100644 --- a/gcc/stmt.c +++ b/gcc/stmt.c @@ -2734,29 +2734,51 @@ expand_return (retval) { /* If this is return x == y; then generate if (x == y) return 1; else return 0; - if we can do it with explicit return insns and - branches are cheap. */ + if we can do it with explicit return insns and branches are cheap, + but not if we have the corresponding scc insn. */ + int has_scc = 0; if (retval_rhs) switch (TREE_CODE (retval_rhs)) { case EQ_EXPR: +#ifdef HAVE_seq + has_scc = HAVE_seq; +#endif case NE_EXPR: +#ifdef HAVE_sne + has_scc = HAVE_sne; +#endif case GT_EXPR: +#ifdef HAVE_sgt + has_scc = HAVE_sgt; +#endif case GE_EXPR: +#ifdef HAVE_sge + has_scc = HAVE_sge; +#endif case LT_EXPR: +#ifdef HAVE_slt + has_scc = HAVE_slt; +#endif case LE_EXPR: +#ifdef HAVE_sle + has_scc = HAVE_sle; +#endif case TRUTH_ANDIF_EXPR: case TRUTH_ORIF_EXPR: case TRUTH_AND_EXPR: case TRUTH_OR_EXPR: case TRUTH_NOT_EXPR: case TRUTH_XOR_EXPR: - op0 = gen_label_rtx (); - jumpifnot (retval_rhs, op0); - expand_value_return (const1_rtx); - emit_label (op0); - expand_value_return (const0_rtx); - return; + if (! has_scc) + { + op0 = gen_label_rtx (); + jumpifnot (retval_rhs, op0); + expand_value_return (const1_rtx); + emit_label (op0); + expand_value_return (const0_rtx); + return; + } } } #endif /* HAVE_return */ |