---
src/mesa/program/register_allocate.c | 21 +++++++++++++++++++++
src/mesa/program/register_allocate.h | 2 ++
2 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/src/mesa/program/register_allocate.c
b/src/mesa/program/register_allocate.c
index de96eb4..f5b5174 100644
--- a/src/mesa/program/register_allocate.c
+++ b/src/mesa/program/register_allocate.c
@@ -200,6 +200,27 @@ ra_add_reg_conflict(struct ra_regs *regs, unsigned int r1,
unsigned int r2)
}
}
+/**
+ * Adds a conflict between base_reg and reg, and also between reg and
+ * anything that base_reg conflicts with.
+ *
+ * This can simplify code for setting up multiple register classes
+ * which are aggregates of some base hardware registers, compared to
+ * explicitly using ra_add_reg_conflict.
+ */
+void
+ra_add_transitive_reg_conflict(struct ra_regs *regs,
+ unsigned int base_reg, unsigned int reg)
+{
+ int i;
+
+ ra_add_reg_conflict(regs, reg, base_reg);
+
+ for (i = 0; i < regs->regs[base_reg].num_conflicts; i++) {
+ ra_add_reg_conflict(regs, reg, regs->regs[base_reg].conflict_list[i]);
+ }
+}
+
unsigned int
ra_alloc_reg_class(struct ra_regs *regs)
{
diff --git a/src/mesa/program/register_allocate.h
b/src/mesa/program/register_allocate.h
index 5b95833..ee2e58a 100644
--- a/src/mesa/program/register_allocate.h
+++ b/src/mesa/program/register_allocate.h
@@ -40,6 +40,8 @@ struct ra_regs *ra_alloc_reg_set(unsigned int count);
unsigned int ra_alloc_reg_class(struct ra_regs *regs);
void ra_add_reg_conflict(struct ra_regs *regs,
unsigned int r1, unsigned int r2);
+void ra_add_transitive_reg_conflict(struct ra_regs *regs,
+ unsigned int base_reg, unsigned int reg);
void ra_class_add_reg(struct ra_regs *regs, unsigned int c, unsigned int reg);
void ra_set_finalize(struct ra_regs *regs);
/** @} */
--
1.7.5.4
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