Check that the input size is correct for the given constraint.
The 'a', 'c', and 'd' constraints on i386 mean a 32-bit register. We cannot
place a 64-bit value into the 32-bit register. Error out instead of causing the
compiler to spew general badness.
<rdar://problem/12415959>
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167717 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaStmtAsm.cpp b/lib/Sema/SemaStmtAsm.cpp
index 7c2c766..e3b5dd8 100644
--- a/lib/Sema/SemaStmtAsm.cpp
+++ b/lib/Sema/SemaStmtAsm.cpp
@@ -179,6 +179,17 @@
Exprs[i] = Result.take();
InputConstraintInfos.push_back(Info);
+
+ const Type *Ty = Exprs[i]->getType().getTypePtr();
+ if (Ty->isDependentType() || Ty->isIncompleteType())
+ continue;
+
+ unsigned Size = Context.getTypeSize(Ty);
+ if (!Context.getTargetInfo().validateInputSize(Literal->getString(),
+ Size))
+ return StmtError(Diag(InputExpr->getLocStart(),
+ diag::err_asm_invalid_input_size)
+ << Info.getConstraintStr());
}
// Check that the clobbers are valid.