commit 2bcb7473b37f9aa76e530f0a2007893489f61586
Author: jiwang <jiwang@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Aug 6 15:57:36 2015 +0000
[AArch64] Tighten direct call pattern to repair -fno-plt
2015-08-06 Jiong Wang <jiong.wang@arm.com>
gcc/
* config/aarch64/aarch64-protos.h (aarch64_is_noplt_call_p): New declaration.
* config/aarch64/aarch64.c (aarch64_is_noplt_call_p): New function.
* config/aarch64/aarch64.md (call_value_symbol): Check noplt scenarios.
(call_symbol): Likewise.
gcc/testsuite/
* gcc.target/aarch64/noplt_1.c: New testcase.
* gcc.target/aarch64/noplt_2.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@226681 138bc75d-0d04-0410-961f-82ee72b054a4
@@ -1,3 +1,10 @@
+2015-08-06 Jiong Wang <jiong.wang@arm.com>
+
+ * config/aarch64/aarch64-protos.h (aarch64_is_noplt_call_p): New declaration.
+ * config/aarch64/aarch64.c (aarch64_is_noplt_call_p): New function.
+ * config/aarch64/aarch64.md (call_value_symbol): Check noplt scenarios.
+ (call_symbol): Likewise.
+
2015-08-06 Venkataramanan Kumar <Venkataramanan.kumar@amd.com>
* tree-vect-patterns.c (vect_recog_mult_pattern): New function
@@ -258,6 +258,7 @@ bool aarch64_handle_option (struct gcc_options *, struct gcc_options *,
const struct cl_decoded_option *, location_t);
bool aarch64_is_extend_from_extract (machine_mode, rtx, rtx);
bool aarch64_is_long_call_p (rtx);
+bool aarch64_is_noplt_call_p (rtx);
bool aarch64_label_mentioned_p (rtx);
void aarch64_declare_function_name (FILE *, const char*, tree);
bool aarch64_legitimate_pic_operand_p (rtx);
@@ -744,6 +744,24 @@ aarch64_is_long_call_p (rtx sym)
return aarch64_decl_is_long_call_p (SYMBOL_REF_DECL (sym));
}
+/* Return true if calls to symbol-ref SYM should not go through
+ plt stubs. */
+
+bool
+aarch64_is_noplt_call_p (rtx sym)
+{
+ const_tree decl = SYMBOL_REF_DECL (sym);
+
+ if (flag_pic
+ && decl
+ && (!flag_plt
+ || lookup_attribute ("noplt", DECL_ATTRIBUTES (decl)))
+ && !targetm.binds_local_p (decl))
+ return true;
+
+ return false;
+}
+
/* Return true if the offsets to a zero/sign-extract operation
represent an expression that matches an extend operation. The
operands represent the paramters from
@@ -603,7 +603,8 @@
(use (match_operand 2 "" ""))
(clobber (reg:DI LR_REGNUM))]
"GET_CODE (operands[0]) == SYMBOL_REF
- && !aarch64_is_long_call_p (operands[0])"
+ && !aarch64_is_long_call_p (operands[0])
+ && !aarch64_is_noplt_call_p (operands[0])"
"bl\\t%a0"
[(set_attr "type" "call")]
)
@@ -665,7 +666,8 @@
(use (match_operand 3 "" ""))
(clobber (reg:DI LR_REGNUM))]
"GET_CODE (operands[1]) == SYMBOL_REF
- && !aarch64_is_long_call_p (operands[1])"
+ && !aarch64_is_long_call_p (operands[1])
+ && !aarch64_is_noplt_call_p (operands[1])"
"bl\\t%a1"
[(set_attr "type" "call")]
)
@@ -1,3 +1,8 @@
+2015-08-06 Jiong Wang <jiong.wang@arm.com>
+
+ * gcc.target/aarch64/noplt_1.c: New testcase.
+ * gcc.target/aarch64/noplt_2.c: Likewise.
+
2015-08-06 Venkataramanan Kumar <Venkataramanan.kumar@amd.com>
* gcc.dg/vect/vect-mult-pattern-1.c: New test.
new file mode 100644
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fpic -fno-plt" } */
+/* { dg-skip-if "-mcmodel=large, no support for -fpic" { aarch64-*-* } { "-mcmodel=large" } { "" } } */
+
+int* bar (void) ;
+
+int
+foo (int a)
+{
+ int *b = bar ();
+ return b[a];
+}
+
+/* { dg-final { scan-assembler "#:got:" { target { aarch64_tiny || aarch64_small } } } } */
+/* { dg-final { scan-assembler "#:got_lo12:" { target aarch64_small } } } */
new file mode 100644
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fpic" } */
+/* { dg-skip-if "-mcmodel=large, no support for -fpic" { aarch64-*-* } { "-mcmodel=large" } { "" } } */
+
+__attribute__ ((noplt))
+int* bar0 (void) ;
+int* bar1 (void) ;
+
+int
+foo (int a)
+{
+ int *b0 = bar0 ();
+ int *b1 = bar1 ();
+ return b0[a] + b1[a];
+}
+
+/* { dg-final { scan-assembler-times "#:got:" 1 { target { aarch64_tiny || aarch64_small } } } } */
+/* { dg-final { scan-assembler-times "#:got_lo12:" 1 { target aarch64_small } } } */