On 09/29/2016 01:25 PM, Tapani Pälli wrote:
x goes like 7 .. 22 .. 11 .. then we break out (as idx >= 3) and in the
end 11 % 5 * 0.25 is 0.75 .. LGTM
argh not 5 but 4 so (11 % 4) * 0.25
Reviewed-by: Tapani Pälli <[email protected]>
On 09/28/2016 11:01 PM, Nicolai Hähnle wrote:
From: Nicolai Hähnle <[email protected]>
This is a regression test for a very specific compiler bug in radeonsi.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97887
---
.../execution/fs-loop-cont-else-bug.shader_test | 44
++++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644
tests/spec/glsl-1.30/execution/fs-loop-cont-else-bug.shader_test
diff --git
a/tests/spec/glsl-1.30/execution/fs-loop-cont-else-bug.shader_test
b/tests/spec/glsl-1.30/execution/fs-loop-cont-else-bug.shader_test
new file mode 100644
index 0000000..f66c95e
--- /dev/null
+++ b/tests/spec/glsl-1.30/execution/fs-loop-cont-else-bug.shader_test
@@ -0,0 +1,44 @@
+# This test used to create bad LLVM IR in radeonsi.
+#
+# Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97887
+
+[require]
+GLSL >= 1.30
+
+[vertex shader passthrough]
+
+[fragment shader]
+#version 130
+
+uniform int initial;
+
+void main() {
+ int idx = 0;
+ int x = initial;
+
+ for (;;) {
+ idx++;
+ if (idx >= 3)
+ break;
+
+ if (x % 2 == 0) {
+ x = x / 2;
+ if (x == 18)
+ break;
+ continue;
+ } else {
+ x = x * 3;
+ }
+ x++;
+ }
+
+ gl_FragColor = vec4(0.0, (x % 4) * 0.25, 0.0, 1.0);
+}
+
+[test]
+clear color 1.0 0.0 0.0 1.0
+clear
+
+uniform int initial 7
+draw rect -1 -1 2 2
+probe all rgba 0.0 0.75 0.0 1.0
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