SPV: Fix missing 'Member' operand to OpArrayLength.

SPIRV/GlslangToSpv.cpp

@@ -741,11 +741,12 @@ bool TGlslangToSpvTraverser::visitUnary(glslang::TVisit /* visit */, glslang::TI
 
         // Normal .length() would have been constant folded by the front-end.
         // So, this has to be block.lastMember.length().
-        // SPV wants "block" as the operand, go get it.
+        // SPV wants "block" and member number as the operands, go get them.
         assert(node->getOperand()->getType().isRuntimeSizedArray());
         glslang::TIntermTyped* block = node->getOperand()->getAsBinaryNode()->getLeft();
         block->traverse(this);
-        spv::Id length = builder.createUnaryOp(spv::OpArrayLength, builder.makeIntType(32), builder.accessChainGetLValue());
+        unsigned int member = node->getOperand()->getAsBinaryNode()->getRight()->getAsConstantUnion()->getConstArray()[0].getUConst();
+        spv::Id length = builder.createArrayLength(builder.accessChainGetLValue(), member);
 
         builder.clearAccessChain();
         builder.setAccessChainRValue(length);

SPIRV/SpvBuilder.cpp

@@ -890,6 +890,16 @@ Id Builder::createAccessChain(StorageClass storageClass, Id base, std::vector<Id
     return chain->getResultId();
 }
 
+Id Builder::createArrayLength(Id base, unsigned int member)
+{
+    Instruction* length = new Instruction(getUniqueId(), makeIntType(32), OpArrayLength);
+    length->addIdOperand(base);
+    length->addImmediateOperand(member);
+    buildPoint->addInstruction(length);
+
+    return length->getResultId();
+}
+
 Id Builder::createCompositeExtract(Id composite, Id typeId, unsigned index)
 {
     Instruction* extract = new Instruction(getUniqueId(), typeId, OpCompositeExtract);

SPIRV/SpvBuilder.h

@@ -225,6 +225,9 @@ public:
     // Create an OpAccessChain instruction
     Id createAccessChain(StorageClass, Id base, std::vector<Id>& offsets);
 
+    // Create an OpArrayLength instruction
+    Id createArrayLength(Id base, unsigned int member);
+
     // Create an OpCompositeExtract instruction
     Id createCompositeExtract(Id composite, Id typeId, unsigned index);
     Id createCompositeExtract(Id composite, Id typeId, std::vector<unsigned>& indexes);

Test/baseResults/spv.310.comp.out

@@ -113,7 +113,7 @@ Linked compute stage:
               58:   23(fvec4) CompositeConstruct 57 57 57 57
               59:     30(ptr) AccessChain 51(outnames) 27 56
                               Store 59 58
-              60:     16(int) ArrayLength 15(outbname)
+              60:     16(int) ArrayLength 15(outbname) 3
               62:     61(ptr) AccessChain 51(outnames) 17
                               Store 62 60
                               Return

glslang/Include/revision.h

@@ -2,5 +2,5 @@
 // For the version, it uses the latest git tag followed by the number of commits.
 // For the date, it uses the current date (when then script is run).
 
-#define GLSLANG_REVISION "3.0.774"
+#define GLSLANG_REVISION "3.0.775"
 #define GLSLANG_DATE "21-Sep-2015"