To access the "n - 100000"th element of "a" in this test, GCC will
generate the following code for msp430-elf with -mcpu=msp430x:
RLAM.W #1, R12
MOV.W a-3392(R12), R12
Since there aren't actually 100,000 elements in a, this means that
"a-3392" offset calculated by the linker can overflow, as the address of
"a" can validly be less than 3392.
The relocations used for -mcpu=msp430 and -mlarge are not as strict and
the calculated value is allowed to wrap around the address space,
avoiding relocation overflows.
>From bfafc633013952c1a5cac2dbb10b774f66be920e Mon Sep 17 00:00:00 2001
From: Jozef Lawrynowicz <joze...@mittosystems.com>
Date: Thu, 16 Jul 2020 11:35:25 +0100
Subject: [PATCH 5/5] MSP430: Skip index-1.c test
To access the "n - 100000"th element of "a" in this test, GCC will
generate the following code for msp430-elf with -mcpu=msp430x:
RLAM.W #1, R12
MOV.W a-3392(R12), R12
Since there aren't actually 100,000 elements in a, this means that
"a-3392" offset calculated by the linker can overflow, as the address of
"a" can validly be less than 3392.
The relocations used for -mcpu=msp430 and -mlarge are not as strict and
the calculated value is allowed to wrap around the address space,
avoiding relocation overflows.
gcc/testsuite/ChangeLog:
* gcc.c-torture/execute/index-1.c: Skip for the default MSP430 430X ISA.
---
gcc/testsuite/gcc.c-torture/execute/index-1.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/gcc/testsuite/gcc.c-torture/execute/index-1.c
b/gcc/testsuite/gcc.c-torture/execute/index-1.c
index b00090d834a..d96be4c77b8 100644
--- a/gcc/testsuite/gcc.c-torture/execute/index-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/index-1.c
@@ -1,3 +1,5 @@
+/* { dg-skip-if "strict reloc overflow checking" { msp430-*-* } { "*" } {
"-mcpu=msp430" "-mlarge"} } */
+
int a[] =
{
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
--
2.27.0
