PR rtl-optimization/21299

[pf3gnuchains/gcc-fork.git] / gcc / reload1.c

diff --git a/gcc/reload1.c b/gcc/reload1.c
index 04f6448..58f77cb 100644 (file)
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -1167,6 +1167,20 @@ reload (rtx first, int global)
       {
        rtx *pnote;
 
+       /* Clean up invalid ASMs so that they don't confuse later passes.
+          See PR 21299.  */
+       if (asm_noperands (PATTERN (insn)) >= 0)
+         {
+           extract_insn (insn);
+           if (!constrain_operands (1))
+             {
+               error_for_asm (insn,
+                              "%<asm%> operand has impossible constraints");
+               delete_insn (insn);
+               continue;
+             }
+         }
+
        if (CALL_P (insn))
          replace_pseudos_in (& CALL_INSN_FUNCTION_USAGE (insn),
                              VOIDmode, CALL_INSN_FUNCTION_USAGE (insn));