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-rw-r--r--llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
index dcc393db6ea..c33c21fe685 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
@@ -169,6 +169,9 @@ void WebAssemblyPassConfig::addPreRegAlloc() {
// Mark registers as representing wasm's expression stack.
addPass(createWebAssemblyRegStackify());
+ // The register coalescing pass has a bad interaction with COPY MIs which have
+ // EXPR_STACK as an extra operand
+ //disablePass(&RegisterCoalescerID);
}
void WebAssemblyPassConfig::addPostRegAlloc() {
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