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authorKhem Raj <raj.khem@gmail.com>2017-10-07 17:29:23 (GMT)
committerRichard Purdie <richard.purdie@linuxfoundation.org>2018-03-14 14:55:02 (GMT)
commitfbf0a745375c293b92cd2584364d7a3c3731fe7e (patch)
tree01ef2a6071c7520aac9a1a85690f15519c27cdd6
parentf7a61385893643e2b4b0c2d100ccde79eafce566 (diff)
downloadpoky-fbf0a745375c293b92cd2584364d7a3c3731fe7e.tar.gz
gcc-6.3: Backport patch to fix ICE on ARM
Fixes internal compiler error: Max. number of generated reload insns per insn is achieved (90) (From OE-Core rev: e58a1b3f0edce84103529b6761fc323be301ba07) Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rw-r--r--meta/recipes-devtools/gcc/gcc-6.3.inc1
-rw-r--r--meta/recipes-devtools/gcc/gcc-6.3/0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch51
2 files changed, 52 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-6.3.inc b/meta/recipes-devtools/gcc/gcc-6.3.inc
index 5c81a33..7b409f1 100644
--- a/meta/recipes-devtools/gcc/gcc-6.3.inc
+++ b/meta/recipes-devtools/gcc/gcc-6.3.inc
@@ -81,6 +81,7 @@ SRC_URI = "\
81 file://0048-sync-gcc-stddef.h-with-musl.patch \ 81 file://0048-sync-gcc-stddef.h-with-musl.patch \
82 file://0054_all_nopie-all-flags.patch \ 82 file://0054_all_nopie-all-flags.patch \
83 file://0055-unwind_h-glibc26.patch \ 83 file://0055-unwind_h-glibc26.patch \
84 file://0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch \
84 ${BACKPORTS} \ 85 ${BACKPORTS} \
85" 86"
86BACKPORTS = "\ 87BACKPORTS = "\
diff --git a/meta/recipes-devtools/gcc/gcc-6.3/0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch b/meta/recipes-devtools/gcc/gcc-6.3/0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch
new file mode 100644
index 0000000..231f147
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-6.3/0056-LRA-PR70904-relax-the-restriction-on-subreg-reload-f.patch
@@ -0,0 +1,51 @@
1From a582b0a53d1dc8604a201348b99ca8de48784e7e Mon Sep 17 00:00:00 2001
2From: jiwang <jiwang@138bc75d-0d04-0410-961f-82ee72b054a4>
3Date: Thu, 12 May 2016 17:00:52 +0000
4Subject: [PATCH] [LRA] PR70904, relax the restriction on subreg reload for
5 wide mode
6
72016-05-12 Jiong Wang <jiong.wang@arm.com>
8
9gcc/
10 PR rtl-optimization/70904
11 * lra-constraint.c (process_addr_reg): Relax the restriction on
12 subreg reload for wide mode.
13
14git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@236181 138bc75d-0d04-0410-961f-82ee72b054a4
15---
16Upstream-Status: Backport
17Signed-off-by: Khem Raj <raj.khem@gmail.com>
18
19 gcc/lra-constraints.c | 16 +++++++++++++++-
20 1 file changed, 15 insertions(+), 1 deletion(-)
21
22diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
23index f96fd458e23..73fb72a2ea5 100644
24--- a/gcc/lra-constraints.c
25+++ b/gcc/lra-constraints.c
26@@ -1326,7 +1326,21 @@ process_addr_reg (rtx *loc, bool check_only_p, rtx_insn **before, rtx_insn **aft
27
28 subreg_p = GET_CODE (*loc) == SUBREG;
29 if (subreg_p)
30- loc = &SUBREG_REG (*loc);
31+ {
32+ reg = SUBREG_REG (*loc);
33+ mode = GET_MODE (reg);
34+
35+ /* For mode with size bigger than ptr_mode, there unlikely to be "mov"
36+ between two registers with different classes, but there normally will
37+ be "mov" which transfers element of vector register into the general
38+ register, and this normally will be a subreg which should be reloaded
39+ as a whole. This is particularly likely to be triggered when
40+ -fno-split-wide-types specified. */
41+ if (in_class_p (reg, cl, &new_class)
42+ || GET_MODE_SIZE (mode) <= GET_MODE_SIZE (ptr_mode))
43+ loc = &SUBREG_REG (*loc);
44+ }
45+
46 reg = *loc;
47 mode = GET_MODE (reg);
48 if (! REG_P (reg))
49--
502.14.2
51