In split_live_ranges_for_shrink_wrap IRA also splits regs that are
only used in debug insns, leading to -fcompare-debug failures.
Bootstrapped and tested on powerpc64-linux {-m32,-m64}. This happens
on at least GCC 5, so not a regression; but it is trivial and obvious,
is it okay for trunk anyway?
Segher
2017-04-18 Segher Boessenkool <seg...@kernel.crashing.org>
PR rtl-optimization/80429
* ira.c (split_live_ranges_for_shrink_wrap): Skip DEBUG_INSNs.
---
gcc/ira.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/gcc/ira.c b/gcc/ira.c
index 7079573..1f760fe 100644
--- a/gcc/ira.c
+++ b/gcc/ira.c
@@ -4999,6 +4999,9 @@ split_live_ranges_for_shrink_wrap (void)
rtx_insn *uin = DF_REF_INSN (use);
next = DF_REF_NEXT_REG (use);
+ if (DEBUG_INSN_P (uin))
+ continue;
+
basic_block ubb = BLOCK_FOR_INSN (uin);
if (ubb == call_dom
|| dominated_by_p (CDI_DOMINATORS, ubb, call_dom))
--
1.9.3
