diff options
Diffstat (limited to 'lib/Target/WebAssembly/WebAssemblyRegStackify.cpp')
-rw-r--r-- | lib/Target/WebAssembly/WebAssemblyRegStackify.cpp | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp b/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp index 2bdba96ab674..a4bb967f36f6 100644 --- a/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp +++ b/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp @@ -746,6 +746,14 @@ bool WebAssemblyRegStackify::runOnMachineFunction(MachineFunction &MF) { MachineDominatorTree &MDT = getAnalysis<MachineDominatorTree>(); LiveIntervals &LIS = getAnalysis<LiveIntervals>(); + // Disable the TEE optimization if we aren't doing direct wasm object + // emission, because lowering TEE to TEE_LOCAL is done in the ExplicitLocals + // pass, which is also disabled. + bool UseTee = true; + if (MF.getSubtarget<WebAssemblySubtarget>() + .getTargetTriple().isOSBinFormatELF()) + UseTee = false; + // Walk the instructions from the bottom up. Currently we don't look past // block boundaries, and the blocks aren't ordered so the block visitation // order isn't significant, but we may want to change this in the future. @@ -811,7 +819,7 @@ bool WebAssemblyRegStackify::runOnMachineFunction(MachineFunction &MF) { Insert = RematerializeCheapDef(Reg, Op, *Def, MBB, Insert->getIterator(), LIS, MFI, MRI, TII, TRI); - } else if (CanMove && + } else if (UseTee && CanMove && OneUseDominatesOtherUses(Reg, Op, MBB, MRI, MDT, LIS, MFI)) { Insert = MoveAndTeeForMultiUse(Reg, Op, Def, MBB, Insert, LIS, MFI, MRI, TII); |