commit 0736712710aaf6b4f14e8301a59b8052bc429b3d
author John Stiles <johnstiles@google.com> Wed Sep 08 13:12:26 2021 -0400
committer SkCQ <skcq-be@skia-corp.google.com.iam.gserviceaccount.com> Wed Sep 08 18:19:13 2021 +0000
tree d2997ff3603d5531f71f898253de2d25fe519e03
parent 8ff713b0b430ed0ff1acf70165f75dec12e09414

Support swizzled out-params in SPIR-V intrinsic calls.

The code in writeFunctionCall which supported swizzled out-params has
been factored out into a pair of helper functions. The code for emitting
intrinsics now relies on these helpers when emitting out-params.

Change-Id: I4436185ae107d70b529e7e1ea0dd89f844c6a673
Bug: skia:11052
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/446719
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>

src/sksl/codegen/SkSLSPIRVCodeGenerator.h

diff --git a/src/sksl/codegen/SkSLSPIRVCodeGenerator.h b/src/sksl/codegen/SkSLSPIRVCodeGenerator.h
index 55bdc74..5c08c82 100644
--- a/src/sksl/codegen/SkSLSPIRVCodeGenerator.h
+++ b/src/sksl/codegen/SkSLSPIRVCodeGenerator.h
@@ -172,6 +172,12 @@
         kRelaxed,
     };
 
+    struct TempVar {
+        SpvId spvId;
+        const Type* type;
+        std::unique_ptr<SPIRVCodeGenerator::LValue> lvalue;
+    };
+
     void setupIntrinsics();
 
     /**
@@ -229,6 +235,13 @@
 
     SpvId writeIntrinsicCall(const FunctionCall& c, OutputStream& out);
 
+    SpvId writeFunctionCallArgument(const Expression& arg,
+                                    const Modifiers& paramModifiers,
+                                    std::vector<TempVar>* tempVars,
+                                    OutputStream& out);
+
+    void copyBackTempVars(const std::vector<TempVar>& tempVars, OutputStream& out);
+
     SpvId writeFunctionCall(const FunctionCall& c, OutputStream& out);