Mesa (master): mesa/st/glsl_to_tgsi: move evaluation of read mask up in the call hierarchy

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Module: Mesa
Branch: master
Commit: 7d55d01b539ac298edf95c2fd006a53dc7df6ee6
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7d55d01b539ac298edf95c2fd006a53dc7df6ee6

Author: Gert Wollny <gw.fossdev at gmail.com>
Date:   Tue Jun  5 22:26:44 2018 +0200

mesa/st/glsl_to_tgsi: move evaluation of read mask up in the call hierarchy

In preparation of the array live range tracking the evaluation of the read
mask is moved out the register live range tracking to the enclosing call
of the generalized read access tracking.

Signed-off-by: Gert Wollny <gw.fossdev at gmail.com>
Acked-by: Dave Airlie <airlied at redhat.com>

---

 src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp
index bc0b2f20b6..24c3fbe2ae 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp
@@ -494,13 +494,8 @@ void temp_access::record_write(int line, prog_scope *scope, int writemask)
       comp[3].record_write(line, scope);
 }
 
-void temp_access::record_read(int line, prog_scope *scope, int swizzle)
+void temp_access::record_read(int line, prog_scope *scope, int readmask)
 {
-   int readmask = 0;
-   for (int idx = 0; idx < 4; ++idx) {
-      int swz = GET_SWZ(swizzle, idx);
-      readmask |= (1 << swz) & 0xF;
-   }
    update_access_mask(readmask);
 
    if (readmask & WRITEMASK_X)
@@ -940,8 +935,14 @@ access_recorder::~access_recorder()
 void access_recorder::record_read(const st_src_reg& src, int line,
                                   prog_scope *scope)
 {
+   int readmask = 0;
+   for (int idx = 0; idx < 4; ++idx) {
+      int swz = GET_SWZ(src.swizzle, idx);
+      readmask |= (1 << swz) & 0xF;
+   }
+
    if (src.file == PROGRAM_TEMPORARY)
-      temp_acc[src.index].record_read(line, scope, src.swizzle);
+      temp_acc[src.index].record_read(line, scope, readmask);
 
    if (src.reladdr)
       record_read(*src.reladdr, line, scope);