diff options
Diffstat (limited to 'llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp index a5ca08f12bd..597d6f4fd1d 100644 --- a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp +++ b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp @@ -261,6 +261,24 @@ bool WebAssemblyTargetLowering::isCheapToSpeculateCtlz() const { return true; } +bool WebAssemblyTargetLowering::isLegalAddressingMode(const DataLayout &DL, + const AddrMode &AM, + Type *Ty, + unsigned AS) const { + // WebAssembly offsets are added as unsigned without wrapping. The + // isLegalAddressingMode gives us no way to determine if wrapping could be + // happening, so we approximate this by accepting only non-negative offsets. + if (AM.BaseOffs < 0) + return false; + + // WebAssembly has no scale register operands. + if (AM.Scale != 0) + return false; + + // Everything else is legal. + return true; +} + //===----------------------------------------------------------------------===// // WebAssembly Lowering private implementation. //===----------------------------------------------------------------------===// @@ -408,7 +426,8 @@ WebAssemblyTargetLowering::LowerCall(CallLoweringInfo &CLI, if (In.Flags.isInConsecutiveRegs()) fail(DL, DAG, "WebAssembly hasn't implemented cons regs return values"); if (In.Flags.isInConsecutiveRegsLast()) - fail(DL, DAG, "WebAssembly hasn't implemented cons regs last return values"); + fail(DL, DAG, + "WebAssembly hasn't implemented cons regs last return values"); // Ignore In.getOrigAlign() because all our arguments are passed in // registers. Tys.push_back(In.VT); @@ -551,9 +570,9 @@ SDValue WebAssemblyTargetLowering::LowerGlobalAddress(SDValue Op, assert(GA->getTargetFlags() == 0 && "WebAssembly doesn't set target flags"); if (GA->getAddressSpace() != 0) fail(DL, DAG, "WebAssembly only expects the 0 address space"); - return DAG.getNode(WebAssemblyISD::Wrapper, DL, VT, - DAG.getTargetGlobalAddress(GA->getGlobal(), DL, VT, - GA->getOffset())); + return DAG.getNode( + WebAssemblyISD::Wrapper, DL, VT, + DAG.getTargetGlobalAddress(GA->getGlobal(), DL, VT, GA->getOffset())); } SDValue |
