Re: [LinuxBIOS] romcc - Internal compiler error: Cannot find block dominated ....

[Doug Bell]

      The attached spd.c contains functions called from my
raminit.c's sdram_set_spd_registers(). Raminit.c is
#included into auto.c. I've tried various workarounds
including putting all the code in spd.c under one
function, getting rid of the device_t ctl, etc. but
compilation doesn't yet work. Ideas appreciated.

Thanks, dB

--- Doug Bell <nxtv3(a)yahoo.com> wrote:

  Beyond that, there was one version in which I simply
 switched the order of declaration of variables to
 make
 it compile:
 
 // unsigned char row,col; // broken
 unsigned char col,row; // works
 
 In another test run........
 //if ( total < c) total+=div; // failed
 
 if ( total < c) subtotal+=div; // was ok
 total=subtotal;
 
 Ron / Eric  - What is the best way to proceed on
 this?
 What info would you want? I don't think I'm doing
 anything bizarre, maybe 4 chars declared, no deep
 levels of functions. 
 
 --- Doug Bell &lt;nxtv3(a)yahoo.com&gt; wrote:
 
  I had one version of code where it failed on a
 line
  like:
 if (speed==100) speed=0;
 
 but problem disappeared if I did :
 if (speed==100) speed2=0;
 
 This may have been a factor in the first reporting
 of
 the problem as well.
 
 -dB
 
 --- Doug Bell &lt;nxtv3(a)yahoo.com&gt; wrote:
 
 > It seems to not be related to register
 allocation,
  > how
 > many layers of functions,  or code size, but to
 > nested
 > if statements or variations thereof, e.g. if (
 > (condition a) && ( condition b) ) ....
 > 
 > 
 > /home/dbell # uname -a
 > Linux Doug 2.6.9 #1 Tue Jan 11 17:26:41 UTC 2005
 > i686
 > Intel(R) Pentium(R) 4 CPU 1500MHz GenuineIntel
 > GNU/Linux
 > 
 > 
 > Target is via epia-sp, under development but
 close
  to
 an alpha release with some open items.
 
 BTW, is there any documentation regarding what
 limitations romcc has (e.g. multidimensional
 arrays
 > not allowed, etc )?   
 > 
 > Thanks, Doug
 > 
 > --- ron minnich &lt;rminnich(a)gmail.com&gt; wrote:
 > 
 > > On 9/26/05, Doug Bell &lt;nxtv3(a)yahoo.com&gt; wrote:
 > > >
 > > > 0x8360d58 phi Internal compiler error:
 Cannot
  > > > find block dominated by 0x82ba9a8
 > > >
 > > > Any ideas on workarounds / fixes here? Is am
 I
  >
running
 > > out of registers or some other problem?
 > 
 > 
 > can you tell us more about the environment,
 > uname -a
 > distro, and linuxbios target?
 > 
 > ron
 > > -- 
 > LinuxBIOS mailing list
 > LinuxBIOS(a)openbios.org
 >
 http://www.openbios.org/mailman/listinfo/linuxbios
 > 
 > 
 > 
 > 		
 > __________________________________ 
 > Yahoo! Mail - PC Magazine Editors' Choice 2005 
 > http://mail.yahoo.com
 > 
 > -- 
 > LinuxBIOS mailing list
 > LinuxBIOS(a)openbios.org
 >
 http://www.openbios.org/mailman/listinfo/linuxbios
 
 
 
 		
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[LinuxBIOS] compiler error isolated

[Doug Bell]

      The attached revised spd.c compiles as is. When you
have :

subtotal=dev+0;  // it works 
subtotal=dev;    // it fails ( internal compiler error
- rhs not used ) 

Amazing but true. What's going on here? 

--- Doug Bell <nxtv3(a)yahoo.com> wrote:

  The attached spd.c contains functions called from my
 raminit.c's sdram_set_spd_registers(). Raminit.c is
 #included into auto.c. I've tried various
 workarounds
 including putting all the code in spd.c under one
 function, getting rid of the device_t ctl, etc. but
 compilation doesn't yet work. Ideas appreciated.
 
 Thanks, dB
 
 --- Doug Bell <nxtv3(a)yahoo.com> wrote:
 
  Beyond that, there was one version in which I
 simply
  switched the order of declaration of variables
to
 make
 it compile:
 
 // unsigned char row,col; // broken
 unsigned char col,row; // works
 
 In another test run........
 //if ( total < c) total+=div; // failed
 
 if ( total < c) subtotal+=div; // was ok
 total=subtotal;
 
 Ron / Eric  - What is the best way to proceed on
 this?
 What info would you want? I don't think I'm doing
 anything bizarre, maybe 4 chars declared, no deep
 levels of functions. 
 
 --- Doug Bell &lt;nxtv3(a)yahoo.com&gt; wrote:
 
  I had one version of code where it failed on a
 line
 > like:
 > if (speed==100) speed=0;
 > 
 > but problem disappeared if I did :
 > if (speed==100) speed2=0;
 > 
 > This may have been a factor in the first
 reporting
  of
 the problem as well.
 
 -dB
 
 --- Doug Bell &lt;nxtv3(a)yahoo.com&gt; wrote:
 
 > It seems to not be related to register
 allocation,
 > > how
 > > many layers of functions,  or code size, but
 to
  > > nested
 > > if statements or variations thereof, e.g. if (
 > > (condition a) && ( condition b) ) ....
 > > 
 > > 
 > > /home/dbell # uname -a
 > > Linux Doug 2.6.9 #1 Tue Jan 11 17:26:41 UTC
 2005
  >
i686
 > Intel(R) Pentium(R) 4 CPU 1500MHz GenuineIntel
 > GNU/Linux
 > 
 > 
 > Target is via epia-sp, under development but
 close
 > > to
 > > an alpha release with some open items.
 > > 
 > > BTW, is there any documentation regarding what
 > > limitations romcc has (e.g. multidimensional
 > arrays
 > > not allowed, etc )?   
 > > 
 > > Thanks, Doug
 > > 
 > > --- ron minnich &lt;rminnich(a)gmail.com&gt; wrote:
 > > 
 > > > On 9/26/05, Doug Bell &lt;nxtv3(a)yahoo.com&gt;
 wrote:
  > >
>
 > > > 0x8360d58 phi Internal compiler error:
 Cannot
 > > > > find block dominated by 0x82ba9a8
 > > > >
 > > > > Any ideas on workarounds / fixes here? Is
 am
  I
 > > > running
 > > > > out of registers or some other problem?
 > > > 
 > > > 
 > > > can you tell us more about the environment,
 > > > uname -a
 > > > distro, and linuxbios target?
 > > > 
 > > > ron
 > > > > -- 
 > > > LinuxBIOS mailing list
 > > > LinuxBIOS(a)openbios.org
 > > >
 >
 http://www.openbios.org/mailman/listinfo/linuxbios
  > > 
 > > 
 > > 
 > > 		
 > > __________________________________ 
 > > Yahoo! Mail - PC Magazine Editors' Choice 2005
 
  >
http://mail.yahoo.com
 > 
 > -- 
 > LinuxBIOS mailing list
 > LinuxBIOS(a)openbios.org
 >
 http://www.openbios.org/mailman/listinfo/linuxbios
 
 
 
 		
 __________________________________ 
 Yahoo! Mail - PC Magazine Editors' Choice 2005 
 http://mail.yahoo.com
 > -- 
 > LinuxBIOS mailing list
 > LinuxBIOS(a)openbios.org
 >
 http://www.openbios.org/mailman/listinfo/linuxbios
 
 
 
 		
 __________________________________ 
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 //ALL SPD STUFF IS IN PROGRESS
 
 #include <device/pci_ids.h>
 
 void spd_dram_presence( void ){}
 void spd_dram_size( void ) {}
 void spd_dram_other( void ) {}
 //unsigned char spd_trp( void ) { 
 //	return 0;
 //}
 
 
 
 unsigned char spd_dram_timings( void ) { 	// set
 dram bus speed based off CPU's FSB and SPD byte 9
 
 	
 	print_info("sdram_spd_dram_timings..........\r\n");
 
 	device_t ctl = (device_t) 0;
 	unsigned char c;
 	unsigned char col,row; 
 	unsigned char freq;
 	unsigned char reg;
 	unsigned char i;
 
 	// find CPU controlller - the CN400 device 0
 function 3 so use virtual device function 2
 	pci_write_config8(0,0x4f,1); // but first allow it
 to be seen using multiple function enable
 
 	ctl = pci_locate_device(
 		PCI_ID(
 PCI_VENDOR_ID_VIA,PCI_DEVICE_ID_VIA_CN400_2 ),
 		0 );
 	c=pci_read_config8(ctl,0x54); 
 
 	print_debug_hex8(c);
 	print_debug(" is CPU FSB\r\n");
 
 	unsigned char fsb;
 	fsb =  c >> 5; 
 
 	print_debug_hex8(fsb);
 	print_debug(" = fsb \r\n");
 	
 	c=smbus_read_byte(SMBUS_MEM_DEVICE_START, 9); //
 one DIMM
 	print_debug_hex8(c);
 	print_debug(" returned as spd data for register
 9\r\n");
 
 	// decide supported dram speed per PG
 	unsigned char speed;
 	if ( c <= 0x50 ) {
 		speed = 200;
 	}
 	else if ( c <= 0x60 ) {
 		speed = 166;
 	}
 	else if ( c <= 0x75 ) {
 		speed = 133;
 	}
 	else {
 		speed = 100;
 	}
 	print_debug_hex8(speed);
 	print_debug(" = speed\r\n");  
 
 	//revisit
 	static const unsigned char timing[5][5] = { 
 
 			//dram	100	133	166	200	266
 
 				{ 0xff,	1,	5,	9,	0xff},   	// row 0 cpu=100
 				{ 0xff,	0,	1,	5,	0xff}, 	// row 1 cpu=133
 				{ 0xff,	2,	0,	1,	0xff}, 	// row 2 cpu=166
 				{ 0xff,	6,	2,	0,	0xff},	// row 3 cpu=200
 				{ 0xff,	0x0a,	6,	2,	0xff}, 	// row 4 cpu=266
 
 						}; // on datasheet there seems to be two
 values for cpu=266 dram=133
 	// also see p. 30 of PG, looks like 0x0a is right
 	// note no 100 or 266 dram speeds
 
 	// important - revise fsb and speed for correct
 indexing into table
 	if ( fsb == 0 ) 	row=0;  // 100 
 	else if ( fsb == 1 ) 	row=1;  // 133
 	else if ( fsb == 3 ) 	row=2;  // 166 note value 
 	else if ( fsb == 2 ) 	row=3;  // 200 note value 
 	else if ( fsb == 4 ) 	row=4;  // 266
 	else {
 		print_debug(" bad fsb setting\r\n");
 		return -1;
 	}
 	if ( speed == 100 ) 		col=0;  // 100 
 	else if ( speed == 133 ) 	col=1;  // 133
 	else if ( speed == 166 ) 	col=2;  // 166
 	else if ( speed == 200 ) 	col=3;  // 200
 	else if ( speed == 266 ) 	col=4;  // 266
 	else {
 		print_debug(" bad speed setting\r\n");
 		return -2;
 	}
 
 	freq=timing[row][col];
 	print_debug_hex8(freq);  // row / col
 	print_debug("  = timing table value \r\n");  
 	
 	if ( freq==0xff ) {
 		print_debug(" bad timing value\r\n");
 		return -3;
 	}
 
 	ctl = pci_locate_device(
 		PCI_ID(
 PCI_VENDOR_ID_VIA,PCI_DEVICE_ID_VIA_CN400_3 ),
 		0 );
 	c=pci_read_config8(ctl,0x68); 
 	print_debug_hex8(c);
 	print_debug(" = r68\r\n");
 	c &=0xf0;
 	c|=freq;
 	pci_write_config8(ctl,0x68,c); 
 	print_debug_hex8(c);
 	print_debug(" = r68 written \r\n");
 
 	/***************** BANK INTERLEAVE ***************/
 
 	c=smbus_read_byte(SMBUS_MEM_DEVICE_START, 17); 
 	if ( ! (c==2 || c==4 ) ) {
 		print_info("unexpected reg 17 value\r\n");
 		return -4;
 	}
 		
 	reg=pci_read_config8(ctl,0x69);
 	reg &=0x3f;
 	reg |= (c<<6);
 	pci_write_config8(ctl,0x69,reg);
 	print_debug_hex8(reg);
 	print_debug(" = r69 written \r\n");
 
 
/*********************************************************/
  
 
 
 	print_info("sdram_set_spd_registers done\r\n");
 	return 0;
 }	
 
 
 
 
 unsigned char spd_trp( void ) { 
 	
 
 // GRAB A BOGUS NON-CONST VALUE FOR COMPILATION TEST
 ONLY!!!
 	unsigned char
 speed=smbus_read_byte(SMBUS_MEM_DEVICE_START, 9); 
 	
 	print_info("spd_trp.........\r\n");
 
 	device_t ctl = (device_t) 0;
 	
 	
 	unsigned char div=0;
 	unsigned char i;
 	unsigned char total,subtotal;
 	unsigned char c;
 
 	// find CPU controlller - the CN400 device 0
 function 3 so use virtual device function 2
 	pci_write_config8(0,0x4f,1); // but first allow it
 to be seen using multiple function enable
 
 	ctl = pci_locate_device(
 		PCI_ID(
 PCI_VENDOR_ID_VIA,PCI_DEVICE_ID_VIA_CN400_3 ),
 		0 );
 
 	/*************** tRP
 **********************************/
 
 	if ( speed == 100 ) 		div=0x28;  // divisor
 	else if ( speed == 133 ) 	div=0x1e;  
 	else if ( speed == 166 ) 	div=0x18;  
 	else if ( speed == 200 ) 	div=0x14;  
 	else {
 
 //		print_debug(" bad tRP speed setting\r\n");
 		return -5;
 	}
 
 
 
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