Fix a PIX pass's attempt to set the validator version (#6707)

This pass was attempting to compare different things. The return values
of GetDxilVersion are not shader models, but... dxil version. Since the
code is trying to upgrade the validator version, I changed this to
GetValidatorVersion, to pair with SetValidatorVersion.
The previous code was breaking the nvidia driver on workgraphs.

lib/DxilPIXPasses/DxilAnnotateWithVirtualRegister.cpp

@@ -123,8 +123,8 @@ bool DxilAnnotateWithVirtualRegister::runOnModule(llvm::Module &M) {
   }
   unsigned int Major = 0;
   unsigned int Minor = 0;
-  m_DM->GetDxilVersion(Major, Minor);
-  if (Major < 6 || (Major == 6 && Minor <= 4)) {
+  m_DM->GetValidatorVersion(Major, Minor);
+  if (hlsl::DXIL::CompareVersions(Major, Minor, 1, 4) < 0) {
     m_DM->SetValidatorVersion(1, 4);
   }
 

tools/clang/test/DXC/Passes/PIX/validatorNoDowngrade.ll

@@ -0,0 +1,67 @@
+; This test tests that a shader with current dxil validator version does not downgrade to 1.4. 
+; (The annotate-with-virtual-register pass was erroneously doing just this)
+
+; RUN: %dxopt %s -dxil-annotate-with-virtual-regs -hlsl-dxilemit -S | FileCheck %s
+
+; CHECK: !dx.valver = !{![[VALVER:.*]]}
+; CHECK-NOT: ![[VALVER]] = !{i32 1, i32 4}
+
+
+; GENERATED FROM:
+; dxc -Emain -Tcs_6_1
+
+
+; void main()
+; {
+; }
+
+
+
+;
+; Input signature:
+;
+; Name                 Index   Mask Register SysValue  Format   Used
+; -------------------- ----- ------ -------- -------- ------- ------
+; no parameters
+;
+; Output signature:
+;
+; Name                 Index   Mask Register SysValue  Format   Used
+; -------------------- ----- ------ -------- -------- ------- ------
+; no parameters
+; shader hash: bcdf90f13d29df9ebdc77539089a75a6
+;
+; Pipeline Runtime Information:
+;
+; Compute Shader
+; NumThreads=(1,1,1)
+;
+;
+; Buffer Definitions:
+;
+;
+; Resource Bindings:
+;
+; Name                                 Type  Format         Dim      ID      HLSL Bind  Count
+; ------------------------------ ---------- ------- ----------- ------- -------------- ------
+;
+target datalayout = "e-m:e-p:32:32-i1:32-i8:32-i16:32-i32:32-i64:64-f16:32-f32:32-f64:64-n8:16:32:64"
+target triple = "dxil-ms-dx"
+
+define void @main() {
+  ret void
+}
+
+!llvm.ident = !{!0}
+!dx.version = !{!1}
+!dx.valver = !{!2}
+!dx.shaderModel = !{!3}
+!dx.entryPoints = !{!4}
+
+!0 = !{!"dxc(private) 1.8.0.4583 (PIX_MemberFunctions, 2f4a01af1-dirty)"}
+!1 = !{i32 1, i32 1}
+!2 = !{i32 1, i32 8}
+!3 = !{!"cs", i32 6, i32 1}
+!4 = !{void ()* @main, !"main", null, null, !5}
+!5 = !{i32 4, !6}
+!6 = !{i32 1, i32 1, i32 1}

tools/clang/test/DXC/Passes/PIX/validatorUpgrade.ll

@@ -0,0 +1,65 @@
+; This test tests that a shader with dxil validator version of 1.3 gets upgraded to 1.4 after the annotate with virtual regs pass
+
+; RUN: %dxopt %s -dxil-annotate-with-virtual-regs -hlsl-dxilemit -S | FileCheck %s
+
+; CHECK: !dx.valver = !{![[VALVER:.*]]}
+; CHECK: ![[VALVER]] = !{i32 1, i32 4}
+
+
+; GENERATED FROM:
+; dxc -Emain -Tcs_6_1
+; void main()
+; {
+; }
+; AND THEN MANUALLY EDITNG valver to 1.3.
+
+
+
+;
+; Input signature:
+;
+; Name                 Index   Mask Register SysValue  Format   Used
+; -------------------- ----- ------ -------- -------- ------- ------
+; no parameters
+;
+; Output signature:
+;
+; Name                 Index   Mask Register SysValue  Format   Used
+; -------------------- ----- ------ -------- -------- ------- ------
+; no parameters
+; shader hash: bcdf90f13d29df9ebdc77539089a75a6
+;
+; Pipeline Runtime Information:
+;
+; Compute Shader
+; NumThreads=(1,1,1)
+;
+;
+; Buffer Definitions:
+;
+;
+; Resource Bindings:
+;
+; Name                                 Type  Format         Dim      ID      HLSL Bind  Count
+; ------------------------------ ---------- ------- ----------- ------- -------------- ------
+;
+target datalayout = "e-m:e-p:32:32-i1:32-i8:32-i16:32-i32:32-i64:64-f16:32-f32:32-f64:64-n8:16:32:64"
+target triple = "dxil-ms-dx"
+
+define void @main() {
+  ret void
+}
+
+!llvm.ident = !{!0}
+!dx.version = !{!1}
+!dx.valver = !{!2}
+!dx.shaderModel = !{!3}
+!dx.entryPoints = !{!4}
+
+!0 = !{!"dxc(private) 1.8.0.4583 (PIX_MemberFunctions, 2f4a01af1-dirty)"}
+!1 = !{i32 1, i32 1}
+!2 = !{i32 1, i32 3}
+!3 = !{!"cs", i32 6, i32 1}
+!4 = !{void ()* @main, !"main", null, null, !5}
+!5 = !{i32 4, !6}
+!6 = !{i32 1, i32 1, i32 1}