Francisco Casas : tests: Add minimal tests for temp lifetimes within a loop.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: fbd2df2ad5080f689d8c5548fe9ca91b8481162e
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/fbd2df2ad5080f689d8c5548fe9ca9...

Author: Francisco Casas <fcasas(a)codeweavers.com>
Date:   Mon May 15 15:57:38 2023 -0400

tests: Add minimal tests for temp lifetimes within a loop.

---

 Makefile.am            |  1 +
 tests/loop.shader_test | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/Makefile.am b/Makefile.am
index 0a61365d..954b0ffd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -136,6 +136,7 @@ vkd3d_shader_tests = \
 	tests/load-level.shader_test \
 	tests/log.shader_test \
 	tests/logic-operations.shader_test \
+	tests/loop.shader_test \
 	tests/majority-syntax.shader_test \
 	tests/math.shader_test \
 	tests/matrix-semantics.shader_test \
diff --git a/tests/loop.shader_test b/tests/loop.shader_test
new file mode 100644
index 00000000..08cf7e55
--- /dev/null
+++ b/tests/loop.shader_test
@@ -0,0 +1,43 @@
+[pixel shader]
+float a;
+
+float4 main() : sv_target
+{
+    float res = 0;
+
+    for (int i = 0; i < 10; ++i)
+    {
+        res += a;
+        // The temp copy of 'a' must reserve its registers for the rest of the loop.
+        // It shall not be overwritten.
+    }
+    return res;
+}
+
+[test]
+uniform 0 float 5.0
+draw quad
+todo probe all rgba (50.0, 50.0, 50.0, 50.0)
+
+
+[pixel shader]
+float a;
+
+float4 main() : sv_target
+{
+    float res = 0;
+
+    for (int i = 0; i < 10; ++i)
+    {
+        res += a;
+        // The temp copy of 'a' must reserve its registers for the rest of the loop.
+        // It shall not be overwritten.
+        i++;
+    }
+    return res;
+}
+
+[test]
+uniform 0 float 4.0
+draw quad
+todo probe all rgba (20.0, 20.0, 20.0, 20.0)