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authorRichard Henderson <richard.henderson@linaro.org>2019-05-17 13:39:56 -0700
committerRichard Henderson <richard.henderson@linaro.org>2019-05-22 15:09:43 -0400
commit25c012b4009256505be3430480954a0233de343e (patch)
tree344333773fe76e2444e1430b66854bea0e8f0327
parent72b4c792c7a576d9246207a8e9a940ed9e191722 (diff)
tcg: Add TCG_OPF_NOT_PRESENT if TCG_TARGET_HAS_foo is negative
If INDEX_op_foo is always expanded by tcg_expand_vec_op, then there may be no reasonable set of constraints to return from tcg_target_op_def for that opcode. Let TCG_TARGET_HAS_foo be specified as -1 in that case. Thus a boolean test for TCG_TARGET_HAS_foo is true, but we will not assert within process_op_defs when no constraints are specified. Compare this with tcg_can_emit_vec_op, which already uses this tri-state indication. Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
-rw-r--r--tcg/tcg-opc.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/tcg/tcg-opc.h b/tcg/tcg-opc.h
index c7d971fa3d..242d608e6d 100644
--- a/tcg/tcg-opc.h
+++ b/tcg/tcg-opc.h
@@ -35,7 +35,7 @@ DEF(call, 0, 0, 3, TCG_OPF_CALL_CLOBBER | TCG_OPF_NOT_PRESENT)
DEF(br, 0, 0, 1, TCG_OPF_BB_END)
-#define IMPL(X) (__builtin_constant_p(X) && !(X) ? TCG_OPF_NOT_PRESENT : 0)
+#define IMPL(X) (__builtin_constant_p(X) && (X) <= 0 ? TCG_OPF_NOT_PRESENT : 0)
#if TCG_TARGET_REG_BITS == 32
# define IMPL64 TCG_OPF_64BIT | TCG_OPF_NOT_PRESENT
#else