The nvptx backend is somewhat unusual in that call insns set a pseudo.
The combiner is surprised by this and allows combining them into other
insns, which remain as INSN rather than CALL_INSN. Aborts ensue.
Bootstrapped and tested on x86_64-linux, together with the other
patches. Ok?
Bernd
* combine.c (try_combine): Don't allow a call as one of the source
insns.
diff --git a/gcc/combine.c b/gcc/combine.c
index 0ec7f85..fe95b41 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -2543,7 +2543,10 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1, rtx_insn *i0,
/* Exit early if one of the insns involved can't be used for
combinations. */
- if (cant_combine_insn_p (i3)
+ if (CALL_P (i2)
+ || (i1 && CALL_P (i1))
+ || (i0 && CALL_P (i0))
+ || cant_combine_insn_p (i3)
|| cant_combine_insn_p (i2)
|| (i1 && cant_combine_insn_p (i1))
|| (i0 && cant_combine_insn_p (i0))
