From c9623db884ec044249c85366e9bc94e47d5cc48a Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Thu, 18 Aug 2016 17:51:27 +0000 Subject: [WebAssembly] Disable the store-results optimization. The WebAssemly spec removing the return value from store instructions, so remove the associated optimization from LLVM. This patch leaves the store instruction operands in place for now, so stores now always write to "$drop"; these will be removed in a seperate patch. llvm-svn: 279100 --- .../Target/WebAssembly/WebAssemblyStoreResults.cpp | 20 -------------------- 1 file changed, 20 deletions(-) (limited to 'llvm/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp') diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp index eb157ddd700..40b7d665f05 100644 --- a/llvm/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp +++ b/llvm/lib/Target/WebAssembly/WebAssemblyStoreResults.cpp @@ -139,15 +139,6 @@ static bool ReplaceDominatedUses(MachineBasicBlock &MBB, MachineInstr &MI, return Changed; } -static bool optimizeStore(MachineBasicBlock &MBB, MachineInstr &MI, - const MachineRegisterInfo &MRI, - MachineDominatorTree &MDT, - LiveIntervals &LIS) { - unsigned ToReg = MI.getOperand(0).getReg(); - unsigned FromReg = MI.getOperand(WebAssembly::StoreValueOperandNo).getReg(); - return ReplaceDominatedUses(MBB, MI, FromReg, ToReg, MRI, MDT, LIS); -} - static bool optimizeCall(MachineBasicBlock &MBB, MachineInstr &MI, const MachineRegisterInfo &MRI, MachineDominatorTree &MDT, @@ -202,17 +193,6 @@ bool WebAssemblyStoreResults::runOnMachineFunction(MachineFunction &MF) { switch (MI.getOpcode()) { default: break; - case WebAssembly::STORE8_I32: - case WebAssembly::STORE16_I32: - case WebAssembly::STORE8_I64: - case WebAssembly::STORE16_I64: - case WebAssembly::STORE32_I64: - case WebAssembly::STORE_F32: - case WebAssembly::STORE_F64: - case WebAssembly::STORE_I32: - case WebAssembly::STORE_I64: - Changed |= optimizeStore(MBB, MI, MRI, MDT, LIS); - break; case WebAssembly::CALL_I32: case WebAssembly::CALL_I64: Changed |= optimizeCall(MBB, MI, MRI, MDT, LIS, TLI, LibInfo); -- cgit v1.2.3