OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[amdgcn] Fix handling of VCC_CONDITIONAL_REG

Browse Source 
Classify vcc_lo and vcc_hi into the VCC_CONDITIONAL_REG class,
and spill them into SGPRs if necessary.

2019-11-15  Kwok Cheung Yeung  <kcy@codesourcery.com>

	gcc/
	* config/gcn/gcn.c (gcn_regno_reg_class): Return VCC_CONDITIONAL_REG
	register class for VCC_LO and VCC_HI.
	(gcn_spill_class): Use SGPR_REGS to spill registers in
	VCC_CONDITIONAL_REG.

From-SVN: r278290
This commit is contained in:
Kwok Cheung Yeung 2019-11-15 12:54:40 +00:00 committed by Kwok Cheung Yeung
parent d03431d0f5
commit 9ecf84e6a5
2 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2019-11-15 Kwok Cheung Yeung <kcy@codesourcery.com>
* config/gcn/gcn.c (gcn_regno_reg_class): Return VCC_CONDITIONAL_REG
register class for VCC_LO and VCC_HI.
(gcn_spill_class): Use SGPR_REGS to spill registers in
VCC_CONDITIONAL_REG.
2019-11-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/92324

6
gcc/config/gcn/gcn.c
View File

@ -462,6 +462,9 @@ gcn_regno_reg_class (int regno)
{
case SCC_REG:
return SCC_CONDITIONAL_REG;
case VCC_LO_REG:
case VCC_HI_REG:
return VCC_CONDITIONAL_REG;
case VCCZ_REG:
return VCCZ_CONDITIONAL_REG;
case EXECZ_REG:
@ -629,7 +632,8 @@ gcn_can_split_p (machine_mode, rtx op)
static reg_class_t
gcn_spill_class (reg_class_t c, machine_mode /*mode */ )
{
if (reg_classes_intersect_p (ALL_CONDITIONAL_REGS, c))
if (reg_classes_intersect_p (ALL_CONDITIONAL_REGS, c)
|| c == VCC_CONDITIONAL_REG)
return SGPR_REGS;
else
return NO_REGS;