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- Add a test to make certain romcc is properly allocating registers.

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git-svn-id: svn://svn.coreboot.org/coreboot/trunk@828 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Eric Biederman
2003-05-13 20:45:19 +00:00
parent 0babc1c116
commit a96d6a9dab
3 changed files with 205 additions and 8 deletions
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1
util/romcc/Makefile
View File

@@ -34,6 +34,7 @@ TESTS=\
simple_test17.c \
simple_test18.c \
simple_test19.c \
simple_test20.c \
raminit_test.c \
raminit_test2.c

64
util/romcc/romcc.c
View File

@@ -10195,6 +10195,14 @@ static void walk_variable_lifetimes(struct compile_state *state,
}
do_triple_set(&live, *expr, 0);
}
expr = triple_lhs(state, ptr, 0);
for(;expr; expr = triple_lhs(state, ptr, expr)) {
/* If the triple is not a definition skip it. */
if (!*expr || !triple_is_def(state, *expr)) {
continue;
}
do_triple_set(&live, *expr, 0);
}
}
/* Free live */
@@ -11017,21 +11025,58 @@ static void color_graph(struct compile_state *state, struct reg_state *rstate)
cgdebug_printf(" %s\n", arch_reg_str(range->color));
}
static void verify_colors(struct compile_state *state, struct reg_state *rstate)
{
struct live_range *lr;
struct live_range_edge *edge;
struct triple *ins, *first;
char used[MAX_REGISTERS];
first = RHS(state->main_function, 0);
ins = first;
do {
if (triple_is_def(state, ins)) {
if ((ins->id < 0) || (ins->id > rstate->ranges)) {
internal_error(state, ins,
"triple without a live range");
}
lr = &rstate->lr[ins->id];
if (lr->color == REG_UNSET) {
internal_error(state, ins,
"triple without a color");
}
/* Find the registers used by the edges */
memset(used, 0, sizeof(used));
for(edge = lr->edges; edge; edge = edge->next) {
if (edge->node->color == REG_UNSET) {
internal_error(state, 0,
"live range without a color");
}
reg_fill_used(state, used, edge->node->color);
}
if (used[lr->color]) {
internal_error(state, ins,
"triple with already used color");
}
}
ins = ins->next;
} while(ins != first);
}
static void color_triples(struct compile_state *state, struct reg_state *rstate)
{
struct live_range *lr;
struct triple *first, *triple;
struct triple *first, *ins;
first = RHS(state->main_function, 0);
triple = first;
ins = first;
do {
if ((triple->id < 0) || (triple->id > rstate->ranges)) {
internal_error(state, triple,
if ((ins->id < 0) || (ins->id > rstate->ranges)) {
internal_error(state, ins,
"triple without a live range");
}
lr = &rstate->lr[triple->id];
triple->id = MK_REG_ID(lr->color, 0);
triple = triple->next;
} while (triple != first);
lr = &rstate->lr[ins->id];
ins->id = MK_REG_ID(lr->color, 0);
ins = ins->next;
} while (ins != first);
}
static void print_interference_block(
@@ -11299,6 +11344,9 @@ static void allocate_registers(struct compile_state *state)
/* Color the live_ranges */
color_graph(state, &rstate);
/* Verify the graph was properly colored */
verify_colors(state, &rstate);
/* Move the colors from the graph to the triples */
color_triples(state, &rstate);

148
util/romcc/tests/simple_test20.c Normal file
View File

@@ -0,0 +1,148 @@
static void outb(unsigned char value, unsigned short port)
{
__builtin_outb(value, port);
}
static void outl(unsigned int value, unsigned short port)
{
__builtin_outl(value, port);
}
static unsigned char inb(unsigned short port)
{
return __builtin_inb(port);
}
static unsigned char inl(unsigned short port)
{
return __builtin_inl(port);
}
static unsigned int config_cmd(unsigned char bus, unsigned devfn, unsigned where)
{
return 0x80000000 | (bus << 16) | (devfn << 8) | (where & ~3);
}
static unsigned int pcibios_read_config_dword(
unsigned char bus, unsigned devfn, unsigned where)
{
outl(config_cmd(bus, devfn, where), 0xCF8);
return inl(0xCFC);
}
/* Base Address */
#ifndef TTYS0_BASE
#define TTYS0_BASE 0x3f8
#endif
#ifndef TTYS0_BAUD
#define TTYS0_BAUD 115200
#endif
#if ((115200%TTYS0_BAUD) != 0)
#error Bad ttys0 baud rate
#endif
#define TTYS0_DIV (115200/TTYS0_BAUD)
/* Line Control Settings */
#ifndef TTYS0_LCS
/* Set 8bit, 1 stop bit, no parity */
#define TTYS0_LCS 0x3
#endif
#define UART_LCS TTYS0_LCS
/* Data */
#define UART_RBR 0x00
#define UART_TBR 0x00
/* Control */
#define UART_IER 0x01
#define UART_IIR 0x02
#define UART_FCR 0x02
#define UART_LCR 0x03
#define UART_MCR 0x04
#define UART_DLL 0x00
#define UART_DLM 0x01
/* Status */
#define UART_LSR 0x05
#define UART_MSR 0x06
#define UART_SCR 0x07
int uart_can_tx_byte(void)
{
return inb(TTYS0_BASE + UART_LSR) & 0x20;
}
void uart_wait_to_tx_byte(void)
{
while(!uart_can_tx_byte())
;
}
void uart_wait_until_sent(void)
{
while(!(inb(TTYS0_BASE + UART_LSR) & 0x40))
;
}
void uart_tx_byte(unsigned char data)
{
uart_wait_to_tx_byte();
outb(data, TTYS0_BASE + UART_TBR);
/* Make certain the data clears the fifos */
uart_wait_until_sent();
}
void uart_init(void)
{
/* disable interrupts */
outb(0x0, TTYS0_BASE + UART_IER);
/* enable fifo's */
outb(0x01, TTYS0_BASE + UART_FCR);
/* Set Baud Rate Divisor to 12 ==> 115200 Baud */
outb(0x80 | UART_LCS, TTYS0_BASE + UART_LCR);
outb(TTYS0_DIV & 0xFF, TTYS0_BASE + UART_DLL);
outb((TTYS0_DIV >> 8) & 0xFF, TTYS0_BASE + UART_DLM);
outb(UART_LCS, TTYS0_BASE + UART_LCR);
}
void __console_tx_char(unsigned char byte)
{
uart_tx_byte(byte);
}
void __console_tx_nibble(unsigned nibble)
{
unsigned char digit;
digit = nibble + '0';
if (digit > '9') {
digit += 39;
}
__console_tx_char(digit);
}
void __console_tx_hex32(unsigned int value)
{
__console_tx_nibble((value >> 28) & 0x0f);
__console_tx_nibble((value >> 24) & 0x0f);
__console_tx_nibble((value >> 20) & 0x0f);
__console_tx_nibble((value >> 16) & 0x0f);
__console_tx_nibble((value >> 12) & 0x0f);
__console_tx_nibble((value >> 8) & 0x0f);
__console_tx_nibble((value >> 4) & 0x0f);
__console_tx_nibble(value & 0x0f);
}
void print_debug_hex32(unsigned int value) { __console_tx_hex32(value); }
void main(void)
{
unsigned long htic;
htic = pcibios_read_config_dword(0, 0xc0, 0x6c);
print_debug_hex32(htic);
}