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authorJohn David Anglin <danglin@gcc.gnu.org>2016-12-11 19:08:47 +0000
committerJohn David Anglin <danglin@gcc.gnu.org>2016-12-11 19:08:47 +0000
commit84c9e5ff798acd208e4dd94577a76a0775e1fa75 (patch)
treeae1ba7515b25dbdd8e8bc6483f074a8e6640ec2d
parent8c7cc1a98ff3834ac2e0a57533c08d123aeebd81 (diff)
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pa.c (pa_callee_copies): New function.
* config/pa/pa.c (pa_callee_copies): New function. * config/pa/pa.opt (mcaller-copies): New option. * doc/invoke.texi (mcaller-copies): Document option. From-SVN: r243531
-rw-r--r--gcc/ChangeLog6
-rw-r--r--gcc/config/pa/pa.c19
-rw-r--r--gcc/config/pa/pa.opt4
-rw-r--r--gcc/doc/invoke.texi10
4 files changed, 37 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 24a7fdd..54558cd 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2012-12-11 John David Anglin <danglin@gcc.gnu.org>
+
+ * config/pa/pa.c (pa_callee_copies): New function.
+ * config/pa/pa.opt (mcaller-copies): New option.
+ * doc/invoke.texi (mcaller-copies): Document option.
+
2016-12-11 Uros Bizjak <ubizjak@gmail.com>
PR target/70799
diff --git a/gcc/config/pa/pa.c b/gcc/config/pa/pa.c
index c8ce083..6d18dfe 100644
--- a/gcc/config/pa/pa.c
+++ b/gcc/config/pa/pa.c
@@ -195,6 +195,8 @@ static bool pa_cannot_force_const_mem (machine_mode, rtx);
static bool pa_legitimate_constant_p (machine_mode, rtx);
static unsigned int pa_section_type_flags (tree, const char *, int);
static bool pa_legitimate_address_p (machine_mode, rtx, bool);
+static bool pa_callee_copies (cumulative_args_t, machine_mode,
+ const_tree, bool);
/* The following extra sections are only used for SOM. */
static GTY(()) section *som_readonly_data_section;
@@ -343,7 +345,7 @@ static size_t n_deferred_plabels = 0;
#undef TARGET_PASS_BY_REFERENCE
#define TARGET_PASS_BY_REFERENCE pa_pass_by_reference
#undef TARGET_CALLEE_COPIES
-#define TARGET_CALLEE_COPIES hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true
+#define TARGET_CALLEE_COPIES pa_callee_copies
#undef TARGET_ARG_PARTIAL_BYTES
#define TARGET_ARG_PARTIAL_BYTES pa_arg_partial_bytes
#undef TARGET_FUNCTION_ARG
@@ -10720,4 +10722,19 @@ pa_maybe_emit_compare_and_swap_exchange_loop (rtx target, rtx mem, rtx val)
return NULL_RTX;
}
+/* Implement TARGET_CALLEE_COPIES. The callee is responsible for copying
+ arguments passed by hidden reference in the 32-bit HP runtime. Users
+ can override this behavior for better compatibility with openmp at the
+ risk of library incompatibilities. Arguments are always passed by value
+ in the 64-bit HP runtime. */
+
+static bool
+pa_callee_copies (cumulative_args_t cum ATTRIBUTE_UNUSED,
+ machine_mode mode ATTRIBUTE_UNUSED,
+ const_tree type ATTRIBUTE_UNUSED,
+ bool named ATTRIBUTE_UNUSED)
+{
+ return !TARGET_CALLER_COPIES;
+}
+
#include "gt-pa.h"
diff --git a/gcc/config/pa/pa.opt b/gcc/config/pa/pa.opt
index 9370b40..c15353d 100644
--- a/gcc/config/pa/pa.opt
+++ b/gcc/config/pa/pa.opt
@@ -41,6 +41,10 @@ mbig-switch
Target Ignore
Does nothing. Preserved for backward compatibility.
+mcaller-copies
+Target Report Mask(CALLER_COPIES)
+Caller copies function arguments passed by hidden reference.
+
mdisable-fpregs
Target Report Mask(DISABLE_FPREGS)
Disable FP regs.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 0c61232..b211667 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -763,7 +763,7 @@ Objective-C and Objective-C++ Dialects}.
@emph{HPPA Options}
@gccoptlist{-march=@var{architecture-type} @gol
--mdisable-fpregs -mdisable-indexing @gol
+-mcaller-copies -mdisable-fpregs -mdisable-indexing @gol
-mfast-indirect-calls -mgas -mgnu-ld -mhp-ld @gol
-mfixed-range=@var{register-range} @gol
-mjump-in-delay -mlinker-opt -mlong-calls @gol
@@ -17465,6 +17465,14 @@ other way around.
@opindex mpa-risc-2-0
Synonyms for @option{-march=1.0}, @option{-march=1.1}, and @option{-march=2.0} respectively.
+@item -mcaller-copies
+@opindex mcaller-copies
+The caller copies function arguments passed by hidden reference. This
+option should be used with care as it is not compatible with the default
+32-bit runtime. However, only aggregates larger than eight bytes are
+passed by hidden reference and the option provides better compatibility
+with openmp.
+
@item -mjump-in-delay
@opindex mjump-in-delay
This option is ignored and provided for compatibility purposes only.