commit 0647d23607012c708fc97750471ab9f141a78a8d
author dan sinclair <dj2@everburning.com> Wed May 27 13:08:29 2020 +0000
committer dan sinclair <dsinclair@google.com> Wed May 27 13:08:29 2020 +0000
tree 54d04da8265ae6acd1be4f9335129c103dbe8d1c
parent 537039009663418971b7104b0659a4e4525ba078

[spirv-writer] Remove stpq support.

This CL removes conversion of stpq to indexes for a vector swizzle as
they are not supported by WGSL.

Change-Id: I3fde18a8a4205cae83b32ce2830a6df48a8f22f4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/22162
Reviewed-by: Ryan Harrison <rharrison@chromium.org>

src/writer/spirv/builder.cc

diff --git a/src/writer/spirv/builder.cc b/src/writer/spirv/builder.cc
index c5d4db6..d829a63 100644
--- a/src/writer/spirv/builder.cc
+++ b/src/writer/spirv/builder.cc
@@ -106,19 +106,15 @@
   switch (name) {
     case 'x':
     case 'r':
-    case 's':
       return 0;
     case 'y':
     case 'g':
-    case 't':
       return 1;
     case 'z':
     case 'b':
-    case 'p':
       return 2;
     case 'w':
     case 'a':
-    case 'q':
       return 3;
   }
   return std::numeric_limits<uint32_t>::max();