} \
}
-/* A C statement or compound statement to output to FILE some
- assembler code to initialize basic-block profiling for the current
- object module. This code should call the subroutine
- `__bb_init_func' once per object module, passing it as its sole
- argument the address of a block allocated in the object module.
- The name of the block is a local symbol made with this statement:
+/* There are three profiling modes for basic blocks available.
+ The modes are selected at compile time by using the options
+ -a or -ax of the gnu compiler.
+ The variable `profile_block_flag' will be set according to the
+ selected option.
- ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
+ profile_block_flag == 0, no option used:
- Of course, since you are writing the definition of
- `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro, you
- can take a short cut in the definition of this macro and use the
- name that you know will result.
+ No profiling done.
- The first word of this block is a flag which will be nonzero if the
- object module has already been initialized. So test this word
- first, and do not call `__bb_init_func' if the flag is nonzero. */
+ profile_block_flag == 1, -a option used.
+
+ Count frequency of execution of every basic block.
+
+ profile_block_flag == 2, -ax option used.
+
+ Generate code to allow several different profiling modes at run time.
+ Available modes are:
+ Produce a trace of all basic blocks.
+ Count frequency of jump instructions executed.
+ In every mode it is possible to start profiling upon entering
+ certain functions and to disable profiling of some other functions.
+
+ The result of basic-block profiling will be written to a file `bb.out'.
+ If the -ax option is used parameters for the profiling will be read
+ from file `bb.in'.
+
+*/
+
+/* The following macro shall output assembler code to FILE
+ to initialize basic-block profiling.
+
+ If profile_block_flag == 2
+
+ Output code to call the subroutine `__bb_init_trace_func'
+ and pass two parameters to it. The first parameter is
+ the address of a block allocated in the object module.
+ The second parameter is the number of the first basic block
+ of the function.
+
+ The name of the block is a local symbol made with this statement:
+
+ ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
+
+ Of course, since you are writing the definition of
+ `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro, you
+ can take a short cut in the definition of this macro and use the
+ name that you know will result.
+
+ The number of the first basic block of the function is
+ passed to the macro in BLOCK_OR_LABEL.
+
+ If described in a virtual assembler language the code to be
+ output looks like:
+
+ parameter1 <- LPBX0
+ parameter2 <- BLOCK_OR_LABEL
+ call __bb_init_trace_func
+
+ else if profile_block_flag != 0
+
+ Output code to call the subroutine `__bb_init_func'
+ and pass one single parameter to it, which is the same
+ as the first parameter to `__bb_init_trace_func'.
+
+ The first word of this parameter is a flag which will be nonzero if
+ the object module has already been initialized. So test this word
+ first, and do not call `__bb_init_func' if the flag is nonzero.
+ Note: When profile_block_flag == 2 the test need not be done
+ but `__bb_init_trace_func' *must* be called.
+
+ BLOCK_OR_LABEL may be used to generate a label number as a
+ branch destination in case `__bb_init_func' will not be called.
+
+ If described in a virtual assembler language the code to be
+ output looks like:
+
+ cmp (LPBX0),0
+ jne local_label
+ parameter1 <- LPBX0
+ call __bb_init_func
+local_label:
+
+*/
#undef FUNCTION_BLOCK_PROFILER
-#define FUNCTION_BLOCK_PROFILER(STREAM, LABELNO) \
+#define FUNCTION_BLOCK_PROFILER(FILE, BLOCK_OR_LABEL) \
do \
{ \
static int num_func = 0; \
char block_table[80], false_label[80]; \
\
ASM_GENERATE_INTERNAL_LABEL (block_table, "LPBX", 0); \
- ASM_GENERATE_INTERNAL_LABEL (false_label, "LPBZ", num_func); \
\
- xops[0] = const0_rtx; \
xops[1] = gen_rtx (SYMBOL_REF, VOIDmode, block_table); \
- xops[2] = gen_rtx (MEM, Pmode, gen_rtx (SYMBOL_REF, VOIDmode, false_label)); \
- xops[3] = gen_rtx (MEM, Pmode, gen_rtx (SYMBOL_REF, VOIDmode, "__bb_init_func")); \
- xops[4] = gen_rtx (MEM, Pmode, xops[1]); \
xops[5] = stack_pointer_rtx; \
- xops[6] = GEN_INT (4); \
xops[7] = gen_rtx (REG, Pmode, 0); /* eax */ \
\
CONSTANT_POOL_ADDRESS_P (xops[1]) = TRUE; \
- CONSTANT_POOL_ADDRESS_P (xops[2]) = TRUE; \
\
- output_asm_insn (AS2(cmp%L4,%0,%4), xops); \
- output_asm_insn (AS1(jne,%2), xops); \
- \
- if (!flag_pic) \
- output_asm_insn (AS1(push%L1,%1), xops); \
- else \
+ switch (profile_block_flag) \
{ \
- output_asm_insn (AS2 (lea%L7,%a1,%7), xops); \
- output_asm_insn (AS1 (push%L7,%7), xops); \
- } \
\
- output_asm_insn (AS1(call,%P3), xops); \
- output_asm_insn (AS2(add%L0,%6,%5), xops); \
- ASM_OUTPUT_INTERNAL_LABEL (STREAM, "LPBZ", num_func); \
- num_func++; \
+ case 2: \
+ \
+ xops[2] = GEN_INT ((BLOCK_OR_LABEL)); \
+ xops[3] = gen_rtx (MEM, Pmode, gen_rtx (SYMBOL_REF, VOIDmode, "__bb_init_trace_func")); \
+ xops[6] = GEN_INT (8); \
+ \
+ output_asm_insn (AS1(push%L2,%2), xops); \
+ if (!flag_pic) \
+ output_asm_insn (AS1(push%L1,%1), xops); \
+ else \
+ { \
+ output_asm_insn (AS2 (lea%L7,%a1,%7), xops); \
+ output_asm_insn (AS1 (push%L7,%7), xops); \
+ } \
+ \
+ output_asm_insn (AS1(call,%P3), xops); \
+ output_asm_insn (AS2(add%L0,%6,%5), xops); \
+ \
+ break; \
+ \
+ default: \
+ \
+ ASM_GENERATE_INTERNAL_LABEL (false_label, "LPBZ", num_func); \
+ \
+ xops[0] = const0_rtx; \
+ xops[2] = gen_rtx (MEM, Pmode, gen_rtx (SYMBOL_REF, VOIDmode, false_label)); \
+ xops[3] = gen_rtx (MEM, Pmode, gen_rtx (SYMBOL_REF, VOIDmode, "__bb_init_func")); \
+ xops[4] = gen_rtx (MEM, Pmode, xops[1]); \
+ xops[6] = GEN_INT (4); \
+ \
+ CONSTANT_POOL_ADDRESS_P (xops[2]) = TRUE; \
+ \
+ output_asm_insn (AS2(cmp%L4,%0,%4), xops); \
+ output_asm_insn (AS1(jne,%2), xops); \
+ \
+ if (!flag_pic) \
+ output_asm_insn (AS1(push%L1,%1), xops); \
+ else \
+ { \
+ output_asm_insn (AS2 (lea%L7,%a1,%7), xops); \
+ output_asm_insn (AS1 (push%L7,%7), xops); \
+ } \
+ \
+ output_asm_insn (AS1(call,%P3), xops); \
+ output_asm_insn (AS2(add%L0,%6,%5), xops); \
+ ASM_OUTPUT_INTERNAL_LABEL (FILE, "LPBZ", num_func); \
+ num_func++; \
+ \
+ break; \
+ \
+ } \
} \
while (0)
+/* The following macro shall output assembler code to FILE
+ to increment a counter associated with basic block number BLOCKNO.
+
+ If profile_block_flag == 2
+
+ Output code to initialize the global structure `__bb' and
+ call the function `__bb_trace_func' which will increment the
+ counter.
+
+ `__bb' consists of two words. In the first word the number
+ of the basic block has to be stored. In the second word
+ the address of a block allocated in the object module
+ has to be stored.
+
+ The basic block number is given by BLOCKNO.
+
+ The address of the block is given by the label created with
+
+ ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
+
+ by FUNCTION_BLOCK_PROFILER.
-/* A C statement or compound statement to increment the count
- associated with the basic block number BLOCKNO. Basic blocks are
- numbered separately from zero within each compilation. The count
- associated with block number BLOCKNO is at index BLOCKNO in a
- vector of words; the name of this array is a local symbol made
- with this statement:
+ Of course, since you are writing the definition of
+ `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro, you
+ can take a short cut in the definition of this macro and use the
+ name that you know will result.
- ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 2);
+ If described in a virtual assembler language the code to be
+ output looks like:
- Of course, since you are writing the definition of
- `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro, you
- can take a short cut in the definition of this macro and use the
- name that you know will result. */
+ move BLOCKNO -> (__bb)
+ move LPBX0 -> (__bb+4)
+ call __bb_trace_func
-#define BLOCK_PROFILER(STREAM, BLOCKNO) \
+ Note that function `__bb_trace_func' must not change the
+ machine state, especially the flag register. To grant
+ this, you must output code to save and restore registers
+ either in this macro or in the macros MACHINE_STATE_SAVE
+ and MACHINE_STATE_RESTORE. The last two macros will be
+ used in the function `__bb_trace_func', so you must make
+ sure that the function prologue does not change any
+ register prior to saving it with MACHINE_STATE_SAVE.
+
+ else if profile_block_flag != 0
+
+ Output code to increment the counter directly.
+ Basic blocks are numbered separately from zero within each
+ compiled object module. The count associated with block number
+ BLOCKNO is at index BLOCKNO in an array of words; the name of
+ this array is a local symbol made with this statement:
+
+ ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 2);
+
+ Of course, since you are writing the definition of
+ `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro, you
+ can take a short cut in the definition of this macro and use the
+ name that you know will result.
+
+ If described in a virtual assembler language the code to be
+ output looks like:
+
+ inc (LPBX2+4*BLOCKNO)
+
+*/
+
+#define BLOCK_PROFILER(FILE, BLOCKNO) \
do \
{ \
- rtx xops[1], cnt_rtx; \
+ rtx xops[8], cnt_rtx; \
char counts[80]; \
+ char *block_table = counts; \
\
- ASM_GENERATE_INTERNAL_LABEL (counts, "LPBX", 2); \
- cnt_rtx = gen_rtx (SYMBOL_REF, VOIDmode, counts); \
- SYMBOL_REF_FLAG (cnt_rtx) = TRUE; \
+ switch (profile_block_flag) \
+ { \
\
- if (BLOCKNO) \
- cnt_rtx = plus_constant (cnt_rtx, (BLOCKNO)*4); \
+ case 2: \
\
- if (flag_pic) \
- cnt_rtx = gen_rtx (PLUS, Pmode, pic_offset_table_rtx, cnt_rtx); \
+ ASM_GENERATE_INTERNAL_LABEL (block_table, "LPBX", 0); \
+ \
+ xops[1] = gen_rtx (SYMBOL_REF, VOIDmode, block_table); \
+ xops[2] = GEN_INT ((BLOCKNO)); \
+ xops[3] = gen_rtx (MEM, Pmode, gen_rtx (SYMBOL_REF, VOIDmode, "__bb_trace_func")); \
+ xops[4] = gen_rtx (SYMBOL_REF, VOIDmode, "__bb"); \
+ xops[5] = plus_constant (xops[4], 4); \
+ xops[0] = gen_rtx (MEM, SImode, xops[4]); \
+ xops[6] = gen_rtx (MEM, SImode, xops[5]); \
+ \
+ CONSTANT_POOL_ADDRESS_P (xops[1]) = TRUE; \
+ \
+ fprintf(FILE, "\tpushf\n"); \
+ output_asm_insn (AS2(mov%L0,%2,%0), xops); \
+ if (flag_pic) \
+ { \
+ xops[7] = gen_rtx (REG, Pmode, 0); /* eax */ \
+ output_asm_insn (AS1(push%L7,%7), xops); \
+ output_asm_insn (AS2(lea%L7,%a1,%7), xops); \
+ output_asm_insn (AS2(mov%L6,%7,%6), xops); \
+ output_asm_insn (AS1(pop%L7,%7), xops); \
+ } \
+ else \
+ output_asm_insn (AS2(mov%L6,%1,%6), xops); \
+ output_asm_insn (AS1(call,%P3), xops); \
+ fprintf(FILE, "\tpopf\n"); \
+ \
+ break; \
+ \
+ default: \
+ \
+ ASM_GENERATE_INTERNAL_LABEL (counts, "LPBX", 2); \
+ cnt_rtx = gen_rtx (SYMBOL_REF, VOIDmode, counts); \
+ SYMBOL_REF_FLAG (cnt_rtx) = TRUE; \
+ \
+ if (BLOCKNO) \
+ cnt_rtx = plus_constant (cnt_rtx, (BLOCKNO)*4); \
+ \
+ if (flag_pic) \
+ cnt_rtx = gen_rtx (PLUS, Pmode, pic_offset_table_rtx, cnt_rtx); \
\
- xops[0] = gen_rtx (MEM, SImode, cnt_rtx); \
- output_asm_insn (AS1(inc%L0,%0), xops); \
+ xops[0] = gen_rtx (MEM, SImode, cnt_rtx); \
+ output_asm_insn (AS1(inc%L0,%0), xops); \
+ \
+ break; \
+ \
+ } \
} \
while (0)
+/* The following macro shall output assembler code to FILE
+ to indicate a return from function during basic-block profiling.
+
+ If profiling_block_flag == 2:
+
+ Output assembler code to call function `__bb_trace_ret'.
+
+ Note that function `__bb_trace_ret' must not change the
+ machine state, especially the flag register. To grant
+ this, you must output code to save and restore registers
+ either in this macro or in the macros MACHINE_STATE_SAVE_RET
+ and MACHINE_STATE_RESTORE_RET. The last two macros will be
+ used in the function `__bb_trace_ret', so you must make
+ sure that the function prologue does not change any
+ register prior to saving it with MACHINE_STATE_SAVE_RET.
+
+ else if profiling_block_flag != 0:
+
+ The macro will not be used, so it need not distinguish
+ these cases.
+*/
+
+#define FUNCTION_BLOCK_PROFILER_EXIT(FILE) \
+do \
+ { \
+ rtx xops[1]; \
+ \
+ xops[0] = gen_rtx (MEM, Pmode, gen_rtx (SYMBOL_REF, VOIDmode, "__bb_trace_ret")); \
+ \
+ output_asm_insn (AS1(call,%P0), xops); \
+ \
+ } \
+while (0)
+
+/* The function `__bb_trace_func' is called in every basic block
+ and is not allowed to change the machine state. Saving (restoring)
+ the state can either be done in the BLOCK_PROFILER macro,
+ before calling function (rsp. after returning from function)
+ `__bb_trace_func', or it can be done inside the function by
+ defining the macros:
+
+ MACHINE_STATE_SAVE(ID)
+ MACHINE_STATE_RESTORE(ID)
+
+ In the latter case care must be taken, that the prologue code
+ of function `__bb_trace_func' does not already change the
+ state prior to saving it with MACHINE_STATE_SAVE.
+
+ The parameter `ID' is a string identifying a unique macro use.
+
+ On the i386 the initialization code at the begin of
+ function `__bb_trace_func' contains a `sub' instruction
+ therefore we handle save and restore of the flag register
+ in the BLOCK_PROFILER macro. */
+
+#define MACHINE_STATE_SAVE(ID) \
+ asm (" pushl %eax"); \
+ asm (" pushl %ecx"); \
+ asm (" pushl %edx"); \
+ asm (" pushl %esi");
+
+#define MACHINE_STATE_RESTORE(ID) \
+ asm (" popl %esi"); \
+ asm (" popl %edx"); \
+ asm (" popl %ecx"); \
+ asm (" popl %eax");
+
/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
the stack pointer does not matter. The value is tested only in
functions that have frame pointers.
projects / platform / upstream / gcc.git / commitdiff