Hi,
This patch adds support for bounds registers into args recognition mechanism
used by scheduler. Bootstrapped and tested on x86_64-unknown-linux-gnu. OK
for trunk?
Thanks,
Ilya
--
gcc/
2015-02-25 Ilya Enkovich
PR target/65167
* gcc/config/i386/i386.c (ix86_function_arg_regno_p): Support
bounds registers.
(avoid_func_arg_motion): Add dependencies for BNDSTX insns.
gcc/testsuite/
2015-02-25 Ilya Enkovich
PR target/65167
* gcc.target/i386/pr65167.c: New.
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 71a5b22..acbe25f 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -6068,6 +6068,9 @@ ix86_function_arg_regno_p (int regno)
int i;
const int *parm_regs;
+ if (TARGET_MPX && BND_REGNO_P (regno))
+return true;
+
if (!TARGET_64BIT)
{
if (TARGET_MACHO)
@@ -26846,6 +26849,16 @@ avoid_func_arg_motion (rtx_insn *first_arg, rtx_insn
*insn)
rtx set;
rtx tmp;
+ /* Add anti dependencies for bounds stores. */
+ if (INSN_P (insn)
+ && GET_CODE (PATTERN (insn)) == PARALLEL
+ && GET_CODE (XVECEXP (PATTERN (insn), 0, 0)) == UNSPEC
+ && XINT (XVECEXP (PATTERN (insn), 0, 0), 1) == UNSPEC_BNDSTX)
+{
+ add_dependence (first_arg, insn, REG_DEP_ANTI);
+ return;
+}
+
set = single_set (insn);
if (!set)
return;
diff --git a/gcc/testsuite/gcc.target/i386/pr65167.c
b/gcc/testsuite/gcc.target/i386/pr65167.c
new file mode 100644
index 000..35f3d6b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr65167.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target mpx } */
+/* { dg-options "-O -fschedule-insns -fcheck-pointer-bounds -mmpx" } */
+
+void bar(int *a, int *b, int *c, int *d, int *e, int *f);
+
+int foo (int *a, int *b, int *c, int *d, int *e, int *f)
+{
+ bar (a, b, c, d, e, f);
+ return *f;
+}