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-rw-r--r--gcc/reg-stack.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c
index bab401ff0bd..8314b21ce35 100644
--- a/gcc/reg-stack.c
+++ b/gcc/reg-stack.c
@@ -1747,6 +1747,7 @@ subst_stack_regs_pat (rtx insn, stack regstack, rtx pat)
case UNSPEC_FPATAN:
case UNSPEC_FYL2X:
+ case UNSPEC_FYL2XP1:
/* These insns operate on the top two stack slots. */
src1 = get_true_reg (&XVECEXP (pat_src, 0, 0));