[MC] Error on a .zerofill directive in a non-virtual section

On darwin, all virtual sections have zerofill type, and having a
.zerofill directive in a non-virtual section is not allowed. Instead of
asserting, show a nicer error.

In order to use the equivalent of .zerofill in a non-virtual section,
the usage of .zero of .space is required.

This patch replaces the assert with an error.

Differential Revision: https://reviews.llvm.org/D48517

llvm-svn: 336127

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/tools/llvm-mca/llvm-mca.cpp b/llvm/tools/llvm-mca/llvm-mca.cpp
index a492eb8cc00..4cdd6baba5e 100644
--- a/llvm/tools/llvm-mca/llvm-mca.cpp
+++ b/llvm/tools/llvm-mca/llvm-mca.cpp
@@ -287,7 +287,8 @@ public:
   void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                         unsigned ByteAlignment) override {}
   void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
-                    uint64_t Size = 0, unsigned ByteAlignment = 0) override {}
+                    uint64_t Size = 0, unsigned ByteAlignment = 0,
+                    SMLoc Loc = SMLoc()) override {}
   void EmitGPRel32Value(const MCExpr *Value) override {}
   void BeginCOFFSymbolDef(const MCSymbol *Symbol) override {}
   void EmitCOFFSymbolStorageClass(int StorageClass) override {}