From ccf93cd0b21e9c0ff0a1d4ace59899fca25ac157 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Sat, 21 Mar 2020 14:39:56 +0000
Subject: [PATCH] [gcn] Fix build with RTL checking [PR94248]
Building (for offloading) a '--target=amdgcn-amdhsa' GCC with
'--enable-checking=yes,extra,rtl' fails:
during RTL pass: split2
[...]/source-gcc/libgcc/libgcc2.c: In function '__absvdi2':
[...]/source-gcc/libgcc/libgcc2.c:271:1: internal compiler error: RTL check: expected code 'reg', have 'const_int' in rhs_regno, at rtl.h:1923
271 | }
| ^
0x565847 ???
[...]/source-gcc/gcc/rtl.c:881
0x59a8a4 ???
[...]/source-gcc/gcc/rtl.h:1923
0x12e3a5c ???
[...]/source-gcc/gcc/config/gcn/gcn.md:631
[...]
Makefile:501: recipe for target '_absvdi2.o' failed
make[4]: *** [_absvdi2.o] Error 1
make[4]: Leaving directory '[...]/build-gcc-offload-amdgcn-amdhsa/amdgcn-amdhsa/gfx900/libgcc'
gcc/
PR target/94248
* config/gcn/gcn.md (*mov<mode>_insn): Use
'reg_overlap_mentioned_p' to check for overlap.
Tested-by: Thomas Schwinge <thomas@codesourcery.com>
---
gcc/ChangeLog | 4 ++++
gcc/config/gcn/gcn.md | 2 +-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5541d9c62d9f..3321e8839707 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
2020-04-29 Jakub Jelinek <jakub@redhat.com>
+ PR target/94248
+ * config/gcn/gcn.md (*mov<mode>_insn): Use
+ 'reg_overlap_mentioned_p' to check for overlap.
+
PR target/94706
* config/ia64/ia64.c (hfa_element_mode): Use DECL_FIELD_ABI_IGNORED
instead of cxx17_empty_base_field_p.
diff --git a/gcc/config/gcn/gcn.md b/gcc/config/gcn/gcn.md
index 8f5937781b2b..8cfb3a85d256 100644
--- a/gcc/config/gcn/gcn.md
+++ b/gcc/config/gcn/gcn.md
@@ -629,7 +629,7 @@
rtx outhi = gen_highpart_mode (SImode, <MODE>mode, operands[0]);
/* Ensure that overlapping registers aren't corrupted. */
- if (REGNO (outlo) == REGNO (inhi))
+ if (reg_overlap_mentioned_p (outlo, inhi))
{
operands[0] = outhi;
operands[1] = inhi;
--
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