From: Jiangjiji <jiangj...@huawei.com>
* gcc/config/aarch64/aarch64.opt: Add a new option.
* gcc/config/aarch64/aarch64.c: Add some new functions and Macros.
* gcc/config/aarch64/aarch64.h: Modify PROFILE_HOOK and FUNCTION_PROFILER.
Signed-off-by: Jiangjiji <jiangj...@huawei.com>
Signed-off-by: Li Bin <huawei.li...@huawei.com>
---
gcc/config/aarch64/aarch64.c | 23 +++++++++++++++++++++++
gcc/config/aarch64/aarch64.h | 13 ++++++++-----
gcc/config/aarch64/aarch64.opt | 4 ++++
3 files changed, 35 insertions(+), 5 deletions(-)
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 752df4e..c70b161 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -440,6 +440,17 @@ aarch64_is_long_call_p (rtx sym)
return aarch64_decl_is_long_call_p (SYMBOL_REF_DECL (sym));
}
+void
+aarch64_function_profiler (FILE *file, int labelno ATTRIBUTE_UNUSED)
+{
+ if (flag_fentry)
+ {
+ fprintf (file, "\tmov\tx9, x30\n");
+ fprintf (file, "\tbl\t__fentry__\n");
+ fprintf (file, "\tmov\tx30, x9\n");
+ }
+}
+
/* 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
@@ -7414,6 +7425,15 @@ aarch64_emit_unlikely_jump (rtx insn)
add_int_reg_note (insn, REG_BR_PROB, very_unlikely);
}
+/* Return true, if profiling code should be emitted before
+ * prologue. Otherwise it returns false.
+ * Note: For x86 with "hotfix" it is sorried. */
+static bool
+aarch64_profile_before_prologue (void)
+{
+ return flag_fentry != 0;
+}
+
/* Expand a compare and swap pattern. */
void
@@ -8454,6 +8474,9 @@ aarch64_cannot_change_mode_class (enum machine_mode from,
#undef TARGET_ASM_ALIGNED_SI_OP
#define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
+#undef TARGET_PROFILE_BEFORE_PROLOGUE
+#define TARGET_PROFILE_BEFORE_PROLOGUE aarch64_profile_before_prologue
+
#undef TARGET_ASM_CAN_OUTPUT_MI_THUNK
#define TARGET_ASM_CAN_OUTPUT_MI_THUNK \
hook_bool_const_tree_hwi_hwi_const_tree_true
diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h
index 77b2bb9..65e34fc 100644
--- a/gcc/config/aarch64/aarch64.h
+++ b/gcc/config/aarch64/aarch64.h
@@ -804,13 +804,16 @@ do {
\
#define PROFILE_HOOK(LABEL) \
{ \
rtx fun, lr; \
- lr = get_hard_reg_initial_val (Pmode, LR_REGNUM); \
- fun = gen_rtx_SYMBOL_REF (Pmode, MCOUNT_NAME); \
- emit_library_call (fun, LCT_NORMAL, VOIDmode, 1, lr, Pmode); \
+ if (!flag_fentry)
+ {
+ lr = get_hard_reg_initial_val (Pmode, LR_REGNUM);
\
+ fun = gen_rtx_SYMBOL_REF (Pmode, MCOUNT_NAME);
\
+ emit_library_call (fun, LCT_NORMAL, VOIDmode, 1, lr, Pmode);
\
+ }
}
-/* All the work done in PROFILE_HOOK, but still required. */
-#define FUNCTION_PROFILER(STREAM, LABELNO) do { } while (0)
+#define FUNCTION_PROFILER(STREAM, LABELNO)
+ aarch64_function_profiler(STREAM, LABELNO)
/* For some reason, the Linux headers think they know how to define
these macros. They don't!!! */
diff --git a/gcc/config/aarch64/aarch64.opt b/gcc/config/aarch64/aarch64.opt
index 266d873..9e4b408 100644
--- a/gcc/config/aarch64/aarch64.opt
+++ b/gcc/config/aarch64/aarch64.opt
@@ -124,3 +124,7 @@ Enum(aarch64_abi) String(ilp32) Value(AARCH64_ABI_ILP32)
EnumValue
Enum(aarch64_abi) String(lp64) Value(AARCH64_ABI_LP64)
+
+mfentry
+Target Report Var(flag_fentry) Init(0)
+Emit profiling counter call at function entry immediately after prologue.
--
1.7.1
