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-rw-r--r--gcc/function.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/function.c b/gcc/function.c
index 6d0f462a262..a98d8dcb29f 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -6628,8 +6628,9 @@ match_asm_constraints_1 (rtx_insn *insn, rtx *p_sets, int noutputs)
/* Only do the transformation for pseudos. */
if (! REG_P (output)
|| rtx_equal_p (output, input)
- || (GET_MODE (input) != VOIDmode
- && GET_MODE (input) != GET_MODE (output)))
+ || !(REG_P (input) || SUBREG_P (input)
+ || MEM_P (input) || CONSTANT_P (input))
+ || !general_operand (input, GET_MODE (output)))
continue;
/* We can't do anything if the output is also used as input,