================
@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -x hlsl
-finclude-default-header -verify %s
+
+void foo() {
+ float3x3 A;
+ float r = A._m00; // read is ok
+ float good1 = A._11;
+ float good2 = A._33;
+
+ float bad0 = A._m44; // expected-error {{matrix row element accessor
is out of bounds of zero based indexing}} expected-error {{matrix column
element accessor is out of bounds of zero based indexing}}
+ float bad1 = A._m33; // expected-error {{matrix row index 3 is out of
bounds of rows size 3}} expected-error {{matrix column index 3 is out of bounds
of columns size 3}}
+ float bad2 = A._mA2; // expected-error {{invalid matrix member 'A'
expected row as integer}}
+ float bad3 = A._m2F; // expected-error {{invalid matrix member 'F'
expected column as integer}}
+
+ float bad4 = A._00; // expected-error {{matrix row element accessor
is out of bounds of one based indexing}} expected-error {{matrix column element
accessor is out of bounds of one based indexing}}
+ float bad5 = A._44; // expected-error {{matrix row index 3 is out of
bounds of rows size 3}} expected-error {{matrix column index 3 is out of bounds
of columns size 3}}
+ float bad6 = A._55; // expected-error {{matrix row element accessor
is out of bounds of one based indexing}} expected-error {{matrix column element
accessor is out of bounds of one based indexing}}
+ float bad7 = A.foo; // expected-error {{invalid matrix member 'foo'
expected zero based: '_mRC' or one-based: '_RC' accessor}}
+ float2 bad8 = A._m00_33; // expected-error {{invalid matrix member '3'
expected '_m' prefix}}
+ float2 bad9 = A._11_m33; // expected-error {{invalid matrix member 'm'
expected row as integer}}
+ float bad10 = A._m0000; // expected-error {{invalid matrix member '0'
expected '_m' prefix}}
+ float bad11 = A._m1; // expected-error {{invalid matrix member '_m1'
expected zero based: '_mRC' accessor}}
+ float bad12 = A._m; // expected-error {{invalid matrix member '_m'
expected zero based: '_mRC' accessor}}
+ float bad13 = A._1; // expected-error {{invalid matrix member '_1'
expected one-based: '_RC' accessor}}
+ float bad14 = A.m; // expected-error {{invalid matrix member 'm'
expected length 4 for zero based: '_mRC' or length 3 for one-based: '_RC'
accessor}}
+
----------------
hekota wrote:
```suggestion
float bad15 = A._m11_m2; // expected-error {{invalid matrix member
'_m2' expected zero based: '_mRC' accessor}}
float bad16 = A._11_2; // expected-error {{invalid matrix member '_2'
expected zero based: '_mRC' accessor}}
```
https://github.com/llvm/llvm-project/pull/171225
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