Mesa (master): nir: add nir_after_phis() cursor helper

[Connor Abbott]

Module: Mesa
Branch: master
Commit: 0dc4cabee213135aa25bef9062366f251838dc16
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0dc4cabee213135aa25bef9062366f251838dc16

Author: Connor Abbott <cwabbott0 at gmail.com>
Date:   Fri Sep  2 19:06:52 2016 -0400

nir: add nir_after_phis() cursor helper

And re-implement nir_after_cf_node_and_phis() using it.

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>

---

 src/compiler/nir/nir.h | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index d0dfb0d..6852551 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -1758,6 +1758,9 @@ typedef struct nir_shader_compiler_options {
     * information must be inferred from the list of input nir_variables.
     */
    bool use_interpolated_input_intrinsics;
+
+   bool lower_b2dx;
+   bool lower_b2i;
 } nir_shader_compiler_options;
 
 typedef struct nir_shader_info {
@@ -2108,6 +2111,16 @@ nir_after_cf_node(nir_cf_node *node)
 }
 
 static inline nir_cursor
+nir_after_phis(nir_block *block)
+{
+   nir_foreach_instr(instr, block) {
+      if (instr->type != nir_instr_type_phi)
+         return nir_before_instr(instr);
+   }
+   return nir_after_block(block);
+}
+
+static inline nir_cursor
 nir_after_cf_node_and_phis(nir_cf_node *node)
 {
    if (node->type == nir_cf_node_block)
@@ -2116,11 +2129,7 @@ nir_after_cf_node_and_phis(nir_cf_node *node)
    nir_block *block = nir_cf_node_as_block(nir_cf_node_next(node));
    assert(block->cf_node.type == nir_cf_node_block);
 
-   nir_foreach_instr(instr, block) {
-      if (instr->type != nir_instr_type_phi)
-         return nir_before_instr(instr);
-   }
-   return nir_after_block(block);
+   return nir_after_phis(block);
 }
 
 static inline nir_cursor