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| author | Reid Kleckner <reid@kleckner.net> | 2015-05-20 21:59:25 +0000 |
|---|---|---|
| committer | Reid Kleckner <reid@kleckner.net> | 2015-05-20 21:59:25 +0000 |
| commit | 892bb0cace9f733df800e4875fcf9325f860501a (patch) | |
| tree | beec6f4d8624b513239270980ae51f497f6e2a40 /clang/lib/CodeGen/CGExprAgg.cpp | |
| parent | 0c28fd7fda3d9e58d9efefb63a249e0270ef7ba4 (diff) | |
| download | bcm5719-llvm-892bb0cace9f733df800e4875fcf9325f860501a.tar.gz bcm5719-llvm-892bb0cace9f733df800e4875fcf9325f860501a.zip | |
Evaluate union cast subexpressions when the cast value is unused
Fixes PR23597.
llvm-svn: 237839
Diffstat (limited to 'clang/lib/CodeGen/CGExprAgg.cpp')
| -rw-r--r-- | clang/lib/CodeGen/CGExprAgg.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/clang/lib/CodeGen/CGExprAgg.cpp b/clang/lib/CodeGen/CGExprAgg.cpp index 77e4464ee8c..6fedf0efda9 100644 --- a/clang/lib/CodeGen/CGExprAgg.cpp +++ b/clang/lib/CodeGen/CGExprAgg.cpp @@ -584,7 +584,12 @@ void AggExprEmitter::VisitCastExpr(CastExpr *E) { } case CK_ToUnion: { - if (Dest.isIgnored()) break; + // Evaluate even if the destination is ignored. + if (Dest.isIgnored()) { + CGF.EmitAnyExpr(E->getSubExpr(), AggValueSlot::ignored(), + /*ignoreResult=*/true); + break; + } // GCC union extension QualType Ty = E->getSubExpr()->getType(); |
