forked from OSchip/llvm-project
implement codegen support for aggregates casted to void.
llvm-svn: 47226
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@ -508,16 +508,24 @@ Value *ScalarExprEmitter::VisitImplicitCastExpr(const ImplicitCastExpr *E) {
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// handle things like function to ptr-to-function decay etc.
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Value *ScalarExprEmitter::EmitCastExpr(const Expr *E, QualType DestTy) {
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// Handle cases where the source is an non-complex type.
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if (!E->getType()->isComplexType()) {
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if (!CGF.hasAggregateLLVMType(E->getType())) {
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Value *Src = Visit(const_cast<Expr*>(E));
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// Use EmitScalarConversion to perform the conversion.
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return EmitScalarConversion(Src, E->getType(), DestTy);
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}
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if (E->getType()->isComplexType()) {
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// Handle cases where the source is a complex type.
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return EmitComplexToScalarConversion(CGF.EmitComplexExpr(E), E->getType(),
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DestTy);
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}
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// Okay, this is a cast from an aggregate. It must be a cast to void. Just
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// evaluate the result and return.
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CGF.EmitAggExpr(E, 0, false);
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return 0;
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}
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Value *ScalarExprEmitter::VisitStmtExpr(const StmtExpr *E) {
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@ -1,4 +1,4 @@
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// RUN: clang %s -emit-llvm
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// RUN: clang < %s -emit-llvm
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int A;
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long long B;
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int C;
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@ -18,3 +18,8 @@ void foo(char *strbuf) {
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int stufflen = 4;
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strbuf += stufflen;
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}
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// Aggregate cast to void
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union uu { int a;}; void f(union uu p) { (void) p;}
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