From e82403e918e18fa8e8ecd0c9e26f2657cc814e12 Mon Sep 17 00:00:00 2001
From: Xi Ruoyao <xry111@xry111.site>
Date: Wed, 24 Aug 2022 21:31:34 +0800
Subject: [PATCH 013/124] LoongArch: Avoid RTL flag check failure in
 loongarch_classify_symbol

SYMBOL_REF_TLS_MODEL invokes SYMBOL_REF_FLAGS, and SYMBOL_REF_FLAGS
invokes RTL_FLAG_CHECK1 and aborts when RTL code is not SYMBOL_REF.

r13-1833 removed "gcc_assert (SYMBOL_REF_P (x))" before invoking
"SYMBOL_REF_TLS_MODEL (x)", indicating that it's now possible that "x"
is not a SYMBOL_REF.  So we need to check if "x" is SYMBOL_REF first.

This fixes a test failure happening with r13-2173 with RTL flag
checking enabled:

    pr106096.C:26:1: internal compiler error: RTL flag check:
    SYMBOL_REF_FLAGS used with unexpected rtx code 'const' in
    loongarch_classify_symbol

gcc/ChangeLog:

	* config/loongarch/loongarch.cc (loongarch_classify_symbol):
	Return early if the rtx is not SYMBOL_REF.

Signed-off-by: Peng Fan <fanpeng@loongson.cn>
Signed-off-by: ticat_fp <fanpeng@loongson.cn>
---
 gcc/config/loongarch/loongarch.cc | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 04c4ddaed..452aba9d4 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -1633,14 +1633,13 @@ loongarch_rtx_constant_in_small_data_p (machine_mode mode)
 static enum loongarch_symbol_type
 loongarch_classify_symbol (const_rtx x)
 {
-  if (LABEL_REF_P (x))
+  if (!SYMBOL_REF_P (x))
     return SYMBOL_PCREL;
 
   if (SYMBOL_REF_TLS_MODEL (x))
     return SYMBOL_TLS;
 
-  if (SYMBOL_REF_P (x)
-      && !loongarch_symbol_binds_local_p (x))
+  if (!loongarch_symbol_binds_local_p (x))
     return SYMBOL_GOT_DISP;
 
   return SYMBOL_PCREL;
-- 
2.33.0