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From 72a4d2d437782afa975f9b29c3ab4a1826ad0cd6 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Wed, 26 Jun 2024 12:54:55 +0100
Subject: [PATCH 2/2] i386: fix recent alias set change
Before r15-1599-g63512c72df09b4, we would create a new alias set, but now
we use -1. Go back to using ix86_GOT_alias_set.
(This is a hack which isn't the cleanest way of fixing it.)
Bug: https://gcc.gnu.org/PR115635
Bug: https://gcc.gnu.org/PR115661
---
gcc/config/i386/i386-expand.cc | 2 +-
gcc/config/i386/i386-expand.h | 1 +
gcc/config/i386/i386.cc | 17 ++++++++++++++---
3 files changed, 16 insertions(+), 4 deletions(-)
diff --git a/gcc/config/i386/i386-expand.cc b/gcc/config/i386/i386-expand.cc
index 5e0173bc7a84..3345f40ad85d 100644
--- a/gcc/config/i386/i386-expand.cc
+++ b/gcc/config/i386/i386-expand.cc
@@ -408,7 +408,7 @@ ix86_expand_move (machine_mode mode, rtx operands[])
: UNSPEC_GOT));
op1 = gen_rtx_CONST (Pmode, op1);
op1 = gen_const_mem (Pmode, op1);
- set_mem_alias_set (op1, GOT_ALIAS_SET);
+ set_mem_alias_set (op1, ix86_GOT_alias_set ());
}
else
{
diff --git a/gcc/config/i386/i386-expand.h b/gcc/config/i386/i386-expand.h
index 5e02df1706df..56bee29253ba 100644
--- a/gcc/config/i386/i386-expand.h
+++ b/gcc/config/i386/i386-expand.h
@@ -34,6 +34,7 @@ struct expand_vec_perm_d
};
rtx legitimize_tls_address (rtx x, enum tls_model model, bool for_mov);
+alias_set_type ix86_GOT_alias_set (void);
rtx legitimize_pic_address (rtx orig, rtx reg);
bool insn_defines_reg (unsigned int regno1, unsigned int regno2,
diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index 1f71ed04be67..62fca080f2f5 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -11823,6 +11823,17 @@ constant_address_p (rtx x)
}
+/* Return a unique alias set for the GOT. */
+
+alias_set_type
+ix86_GOT_alias_set (void)
+{
+ static alias_set_type set = -1;
+ if (set == -1)
+ set = new_alias_set ();
+ return set;
+}
+
/* Return a legitimate reference for ORIG (an address) using the
register REG. If REG is 0, a new pseudo is generated.
@@ -11925,7 +11936,7 @@ legitimize_pic_address (rtx orig, rtx reg)
UNSPEC_GOTPCREL);
new_rtx = gen_rtx_CONST (Pmode, new_rtx);
new_rtx = gen_const_mem (Pmode, new_rtx);
- set_mem_alias_set (new_rtx, GOT_ALIAS_SET);
+ set_mem_alias_set (new_rtx, ix86_GOT_alias_set ());
}
else
{
@@ -11947,7 +11958,7 @@ legitimize_pic_address (rtx orig, rtx reg)
new_rtx = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, new_rtx);
new_rtx = gen_const_mem (Pmode, new_rtx);
- set_mem_alias_set (new_rtx, GOT_ALIAS_SET);
+ set_mem_alias_set (new_rtx, ix86_GOT_alias_set ());
}
new_rtx = copy_to_suggested_reg (new_rtx, reg, Pmode);
@@ -12324,7 +12335,7 @@ legitimize_tls_address (rtx x, enum tls_model model, bool for_mov)
if (pic)
off = gen_rtx_PLUS (tp_mode, pic, off);
off = gen_const_mem (tp_mode, off);
- set_mem_alias_set (off, GOT_ALIAS_SET);
+ set_mem_alias_set (off, ix86_GOT_alias_set ());
if (TARGET_64BIT || TARGET_ANY_GNU_TLS)
{
--
2.45.2
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