diff options
Diffstat (limited to 'llvm/lib/CodeGen/WasmEHPrepare.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/WasmEHPrepare.cpp | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/WasmEHPrepare.cpp b/llvm/lib/CodeGen/WasmEHPrepare.cpp index c04a7b28eff9..aa6645227edb 100644 --- a/llvm/lib/CodeGen/WasmEHPrepare.cpp +++ b/llvm/lib/CodeGen/WasmEHPrepare.cpp @@ -77,8 +77,8 @@ // //===----------------------------------------------------------------------===// -#include "llvm/CodeGen/TargetLowering.h" -#include "llvm/CodeGen/TargetSubtargetInfo.h" +#include "llvm/CodeGen/MachineBasicBlock.h" +#include "llvm/CodeGen/Passes.h" #include "llvm/CodeGen/WasmEHFuncInfo.h" #include "llvm/IR/IRBuilder.h" #include "llvm/IR/IntrinsicsWebAssembly.h" @@ -212,9 +212,15 @@ bool WasmEHPrepare::prepareEHPads(Function &F) { assert(F.hasPersonalityFn() && "Personality function not found"); - // __wasm_lpad_context global variable + // __wasm_lpad_context global variable. + // This variable should be thread local. If the target does not support TLS, + // we depend on CoalesceFeaturesAndStripAtomics to downgrade it to + // non-thread-local ones, in which case we don't allow this object to be + // linked with other objects using shared memory. LPadContextGV = cast<GlobalVariable>( M.getOrInsertGlobal("__wasm_lpad_context", LPadContextTy)); + LPadContextGV->setThreadLocalMode(GlobalValue::GeneralDynamicTLSModel); + LPadIndexField = IRB.CreateConstGEP2_32(LPadContextTy, LPadContextGV, 0, 0, "lpad_index_gep"); LSDAField = |