tcg: Add TCGV_IS_UNUSED_*

Cc: Aurelien Jarno <[email protected]> Signed-off-by: Richard Henderson <[email protected]> Reviewed-by: Andreas Färber <[email protected]> Signed-off-by: Blue Swirl <[email protected]>
vbolshakov · Dec 29, 2012 · afcb92b · afcb92b
1 parent 927fa90
commit afcb92b
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diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
@@ -2329,6 +2329,7 @@ static inline void tcg_gen_movcond_i64(TCGCond cond, TCGv_i64 ret,
 #define tcg_gen_qemu_ldst_op tcg_gen_op3i_i32
 #define tcg_gen_qemu_ldst_op_i64 tcg_gen_qemu_ldst_op_i64_i32
 #define TCGV_UNUSED(x) TCGV_UNUSED_I32(x)
+#define TCGV_IS_UNUSED(x) TCGV_IS_UNUSED_I32(x)
 #define TCGV_EQUAL(a, b) TCGV_EQUAL_I32(a, b)
 #else
 #define TCGv TCGv_i64
@@ -2340,6 +2341,7 @@ static inline void tcg_gen_movcond_i64(TCGCond cond, TCGv_i64 ret,
 #define tcg_gen_qemu_ldst_op tcg_gen_op3i_i64
 #define tcg_gen_qemu_ldst_op_i64 tcg_gen_qemu_ldst_op_i64_i64
 #define TCGV_UNUSED(x) TCGV_UNUSED_I64(x)
+#define TCGV_IS_UNUSED(x) TCGV_IS_UNUSED_I64(x)
 #define TCGV_EQUAL(a, b) TCGV_EQUAL_I64(a, b)
 #endif
 

diff --git a/tcg/tcg.h b/tcg/tcg.h
@@ -270,6 +270,9 @@ typedef int TCGv_i64;
 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
 
+#define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
+#define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
+
 /* call flags */
 /* Helper does not read globals (either directly or through an exception). It
    implies TCG_CALL_NO_WRITE_GLOBALS. */