Linux kernel compilation for aarch64 triggers ICE if
CONFIG_CC_OPTIMIZE_FOR_SIZE=y.
The rootcause is GCC bug #91102 'aarch64 ICE on Linux kernel with -Os'.
Apply the fix to 9.2.
Signed-off-by: Taras Kondratiuk <takon...@cisco.com>
---
meta/recipes-devtools/gcc/gcc-9.2.inc | 1 +
...02-aarch64-ICE-on-Linux-kernel-with-.patch | 95 +++++++++++++++++++
2 files changed, 96 insertions(+)
create mode 100644
meta/recipes-devtools/gcc/gcc-9.2/re-PR-target-91102-aarch64-ICE-on-Linux-kernel-with-.patch
diff --git a/meta/recipes-devtools/gcc/gcc-9.2.inc
b/meta/recipes-devtools/gcc/gcc-9.2.inc
index 926df11c2782..2bae85afe3a3 100644
--- a/meta/recipes-devtools/gcc/gcc-9.2.inc
+++ b/meta/recipes-devtools/gcc/gcc-9.2.inc
@@ -69,6 +69,7 @@ SRC_URI = "\
file://CVE-2019-15847_1.patch \
file://CVE-2019-15847_2.patch \
file://CVE-2019-15847_3.patch \
+ file://re-PR-target-91102-aarch64-ICE-on-Linux-kernel-with-.patch \
"
S = "${TMPDIR}/work-shared/gcc-${PV}-${PR}/gcc-${PV}"
SRC_URI[md5sum] = "3818ad8600447f05349098232c2ddc78"
diff --git
a/meta/recipes-devtools/gcc/gcc-9.2/re-PR-target-91102-aarch64-ICE-on-Linux-kernel-with-.patch
b/meta/recipes-devtools/gcc/gcc-9.2/re-PR-target-91102-aarch64-ICE-on-Linux-kernel-with-.patch
new file mode 100644
index 000000000000..c37e0bb9dd9b
--- /dev/null
+++
b/meta/recipes-devtools/gcc/gcc-9.2/re-PR-target-91102-aarch64-ICE-on-Linux-kernel-with-.patch
@@ -0,0 +1,95 @@
+From efb0ee06f5c0186c2d1442ecd4dbbd55dbd97b44 Mon Sep 17 00:00:00 2001
+From: Vladimir Makarov <vmaka...@redhat.com>
+Date: Wed, 10 Jul 2019 16:07:10 +0000
+Subject: [PATCH] re PR target/91102 (aarch64 ICE on Linux kernel with -Os
+ starting with r270266)
+
+2019-07-10 Vladimir Makarov <vmaka...@redhat.com>
+
+ PR target/91102
+ * lra-constraints.c (process_alt_operands): Don't match user
+ defined regs only if they are early clobbers.
+
+2019-07-10 Vladimir Makarov <vmaka...@redhat.com>
+
+ PR target/91102
+ * gcc.target/aarch64/pr91102.c: New test.
+
+From-SVN: r273357
+Upstream-Status: Backport
[https://github.com/gcc-mirror/gcc/commit/613caed2feb9cfc8158308670b59df3d031ec629]
+[takondra: dropped conflicting ChangeLog changes]
+Signed-off-by: Taras Kondratiuk <takon...@cisco.com>
+---
+ gcc/lra-constraints.c | 17 ++++++++++----
+ gcc/testsuite/gcc.target/aarch64/pr91102.c | 26 ++++++++++++++++++++++
+ 2 files changed, 39 insertions(+), 4 deletions(-)
+ create mode 100644 gcc/testsuite/gcc.target/aarch64/pr91102.c
+
+diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
+index cf33da8013e4..6382dbf852b6 100644
+--- a/gcc/lra-constraints.c
++++ b/gcc/lra-constraints.c
+@@ -2172,8 +2172,9 @@ process_alt_operands (int only_alternative)
+ else
+ {
+ /* Operands don't match. If the operands are
+- different user defined explicit hard registers,
+- then we cannot make them match. */
++ different user defined explicit hard
++ registers, then we cannot make them match
++ when one is early clobber operand. */
+ if ((REG_P (*curr_id->operand_loc[nop])
+ || SUBREG_P (*curr_id->operand_loc[nop]))
+ && (REG_P (*curr_id->operand_loc[m])
+@@ -2192,9 +2193,17 @@ process_alt_operands (int only_alternative)
+ && REG_P (m_reg)
+ && HARD_REGISTER_P (m_reg)
+ && REG_USERVAR_P (m_reg))
+- break;
++ {
++ int i;
++
++ for (i = 0; i < early_clobbered_regs_num; i++)
++ if (m == early_clobbered_nops[i])
++ break;
++ if (i < early_clobbered_regs_num
++ || early_clobber_p)
++ break;
++ }
+ }
+-
+ /* Both operands must allow a reload register,
+ otherwise we cannot make them match. */
+ if (curr_alt[m] == NO_REGS)
+diff --git a/gcc/testsuite/gcc.target/aarch64/pr91102.c
b/gcc/testsuite/gcc.target/aarch64/pr91102.c
+new file mode 100644
+index 000000000000..70b99045a48e
+--- /dev/null
++++ b/gcc/testsuite/gcc.target/aarch64/pr91102.c
+@@ -0,0 +1,26 @@
++/* PR target/91102 */
++/* { dg-do compile } */
++/* { dg-options "-O2" } */
++
++int
++foo (long d, long l)
++{
++ register long e asm ("x1") = d;
++ register long f asm("x2") = l;
++ asm ("" : : "r" (e), "r" (f));
++ return 3;
++}
++
++struct T { int i; int j; };
++union S { long h; struct T t; };
++
++void
++bar (union S b)
++{
++ while (1)
++ {
++ union S c = b;
++ c.t.j++;
++ b.h = foo (b.h, c.h);
++ }
++}
--
2.18.1
--
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