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-rw-r--r--gcc/genemit.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/genemit.c b/gcc/genemit.c
index 3cd6499..89d9e99 100644
--- a/gcc/genemit.c
+++ b/gcc/genemit.c
@@ -195,6 +195,14 @@ gen_exp (rtx x, enum rtx_code subroutine_type, char *used, md_rtx_info *info)
return;
case CONST_DOUBLE:
+ /* Handle `const_double_zero' rtx. */
+ if (CONST_DOUBLE_REAL_VALUE (x)->cl == rvc_zero)
+ {
+ printf ("CONST_DOUBLE_ATOF (\"0\", %smode)",
+ GET_MODE_NAME (GET_MODE (x)));
+ return;
+ }
+ /* Fall through. */
case CONST_FIXED:
case CONST_WIDE_INT:
/* These shouldn't be written in MD files. Instead, the appropriate