Support GEP and ConstantExprs directly in the JSBackend.

This patch also lays the groundwork for the single-use instruction trick to
reduce the number of temporary variables.

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/Transforms/NaCl/PNaClABISimplify.cpp b/lib/Transforms/NaCl/PNaClABISimplify.cpp
index 520663152a..416c38dd17 100644
--- a/lib/Transforms/NaCl/PNaClABISimplify.cpp
+++ b/lib/Transforms/NaCl/PNaClABISimplify.cpp
@@ -116,15 +116,19 @@ void llvm::PNaClABISimplifyAddPostOptPasses(PassManager &PM) {
   // are expanded out later.
   PM.add(createFlattenGlobalsPass());
 
+#if 0 // XXX EMSCRIPTEN: We can handle ConstantExprs in our backend.
   // We should not place arbitrary passes after ExpandConstantExpr
   // because they might reintroduce ConstantExprs.
   PM.add(createExpandConstantExprPass());
+#endif
   // PromoteIntegersPass does not handle constexprs and creates GEPs,
   // so it goes between those passes.
   PM.add(createPromoteIntegersPass());
+#if 0 // XXX EMSCRIPTEN: We can handle GEPs in our backend.
   // ExpandGetElementPtr must follow ExpandConstantExpr to expand the
   // getelementptr instructions it creates.
   PM.add(createExpandGetElementPtrPass());
+#endif
   // Rewrite atomic and volatile instructions with intrinsic calls.
 #if 0 // EMSCRIPTEN: we don't need to fix volatiles etc, and can use llvm intrinsics
   PM.add(createRewriteAtomicsPass());