From 0343822bd86552c0264836a6d6f0927bf39c87b1 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Mon, 19 Nov 2012 23:28:04 +0000 Subject: [PATCH] re PR middle-end/55359 (ICE in simplify_subreg accessing an unaligned subvector) gcc/ PR middle-end/55359 * simplify-rtx.c (simplify_subreg): Return null for invalid offsets. gcc/testsuite/ * gcc.target/i386/pr55359.c: New test. From-SVN: r193640 --- gcc/ChangeLog | 5 +++++ gcc/simplify-rtx.c | 7 +++++-- gcc/testsuite/ChangeLog | 4 ++++ gcc/testsuite/gcc.target/i386/pr55359.c | 10 ++++++++++ 4 files changed, 24 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/gcc.target/i386/pr55359.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 46d471f0ff4..dcb56bcfa9e 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2012-11-19 Richard Sandiford + + PR middle-end/55359 + * simplify-rtx.c (simplify_subreg): Return null for invalid offsets. + 2012-11-19 Aldy Hernandez * trans-mem.c (execute_tm_mark): Release bb_regions. diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 18223a89f4a..46d9e8a1ede 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -5685,8 +5685,11 @@ simplify_subreg (enum machine_mode outermode, rtx op, gcc_assert (GET_MODE (op) == innermode || GET_MODE (op) == VOIDmode); - gcc_assert ((byte % GET_MODE_SIZE (outermode)) == 0); - gcc_assert (byte < GET_MODE_SIZE (innermode)); + if ((byte % GET_MODE_SIZE (outermode)) != 0) + return NULL_RTX; + + if (byte >= GET_MODE_SIZE (innermode)) + return NULL_RTX; if (outermode == innermode && !byte) return op; diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index e5bafaa7825..514809970d6 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2012-11-19 Richard Sandiford + + * gcc.target/i386/pr55359.c: New test. + 2012-11-19 Eric Botcazou * g++.dg/tls/thread_local-order1.C: Add dg-require-cxa-atexit. diff --git a/gcc/testsuite/gcc.target/i386/pr55359.c b/gcc/testsuite/gcc.target/i386/pr55359.c new file mode 100644 index 00000000000..222affc6642 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr55359.c @@ -0,0 +1,10 @@ +/* { dg-do compile } */ +/* { dg-options "-mavx2 -O2" } */ + +#include + +__m128d +f (__m256d x) +{ + return *((__m128d*) ((double *) &x + 1)); +} -- 2.30.2