Hi, Currenly ix86_pass_by_reference may return 1 for bounds if MS ABI is used. This patch explicitly says bounds are never passed by reference. Bootstrapped and tested on x86_64-unknown-linux-gnu. OK for trunk?
Thanks, Ilya -- gcc/ 2015-02-25 Ilya Enkovich <ilya.enkov...@intel.com> PR target/65184 * gcc/config/i386/i386.c (ix86_pass_by_reference) Bounds are never passed by reference. gcc/testsuite/ 2015-02-25 Ilya Enkovich <ilya.enkov...@intel.com> PR target/65184 * gcc.target/i386/pr65184.c: New. diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 71a5b22..28242d7 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -7859,6 +7859,11 @@ ix86_pass_by_reference (cumulative_args_t cum_v, machine_mode mode, { CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); + /* Bounds are never passed by reference. */ + if ((type && POINTER_BOUNDS_TYPE_P (type)) + || POINTER_BOUNDS_MODE_P (mode)) + return false; + /* See Windows x64 Software Convention. */ if (TARGET_64BIT && (cum ? cum->call_abi : ix86_abi) == MS_ABI) { diff --git a/gcc/testsuite/gcc.target/i386/pr65184.c b/gcc/testsuite/gcc.target/i386/pr65184.c new file mode 100644 index 0000000..0355f29 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr65184.c @@ -0,0 +1,17 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target mpx } */ +/* { dg-options "-O2 -mabi=ms -fcheck-pointer-bounds -mmpx" } */ + +void +foo (int *a) +{ + if (a[0] != a[1] * 2333) + __builtin_abort (); +} + +void +bar (int *a) +{ + if (a[0] != a[1] * 2333) + __builtin_abort (); +}