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-rw-r--r--lib/hipe/llvm/hipe_rtl_to_llvm.erl10
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/hipe/llvm/hipe_rtl_to_llvm.erl b/lib/hipe/llvm/hipe_rtl_to_llvm.erl
index 66b2e10fb8..46201cb2ef 100644
--- a/lib/hipe/llvm/hipe_rtl_to_llvm.erl
+++ b/lib/hipe/llvm/hipe_rtl_to_llvm.erl
@@ -1496,16 +1496,18 @@ seperate_relocs([R|Rs], CallAcc, AtomAcc, ClosureAcc, LabelAcc, JmpTableAcc) ->
%% @doc External declaration of an atom.
declare_atom({AtomName, _}) ->
- WordTy = hipe_llvm:mk_int(?WORD_WIDTH),
- hipe_llvm:mk_const_decl("@" ++ AtomName, "external constant", WordTy, "").
+ %% The type has to be byte, or a backend might assume the constant is aligned
+ %% and incorrectly optimise away type tests
+ ByteTy = hipe_llvm:mk_int(8),
+ hipe_llvm:mk_const_decl("@" ++ AtomName, "external constant", ByteTy, "").
%% @doc Creation of local variable for an atom.
load_atom({AtomName, _}) ->
Dst = "%" ++ AtomName ++ "_var",
Name = "@" ++ AtomName,
WordTy = hipe_llvm:mk_int(?WORD_WIDTH),
- WordTyPtr = hipe_llvm:mk_pointer(WordTy),
- hipe_llvm:mk_conversion(Dst, ptrtoint, WordTyPtr, Name, WordTy).
+ ByteTyPtr = hipe_llvm:mk_pointer(hipe_llvm:mk_int(8)),
+ hipe_llvm:mk_conversion(Dst, ptrtoint, ByteTyPtr, Name, WordTy).
%% @doc External declaration of a closure.
declare_closure({ClosureName, _})->