Index: lib/Target/ARM/ARMFrameLowering.cpp =================================================================== --- lib/Target/ARM/ARMFrameLowering.cpp +++ lib/Target/ARM/ARMFrameLowering.cpp @@ -2157,9 +2157,15 @@ // Do not generate a prologue for leaf functions with a stack of size zero. // For non-leaf functions we have to allow for the possibility that the - // call is to a non-split function, as in PR37807. - if (StackSize == 0 && !MFI.hasTailCall()) + // callis to a non-split function, as in PR37807. This function could also + // take the address of a non-split function. When the linker tries to adjust + // its non-existent prologue, it would fail with an error. Mark the object + // file so that such failures are not errors. See this Go language bug-report + // https://go-review.googlesource.com/c/go/+/148819/ + if (StackSize == 0 && !MFI.hasTailCall()) { + MF.getMMI().setHasNosplitStack(true); return; + } // Use R4 and R5 as scratch registers. // We save R4 and R5 before use and restore them before leaving the function. Index: lib/Target/X86/X86FrameLowering.cpp =================================================================== --- lib/Target/X86/X86FrameLowering.cpp +++ lib/Target/X86/X86FrameLowering.cpp @@ -2270,9 +2270,15 @@ // Do not generate a prologue for leaf functions with a stack of size zero. // For non-leaf functions we have to allow for the possibility that the - // call is to a non-split function, as in PR37807. - if (StackSize == 0 && !MFI.hasTailCall()) + // callis to a non-split function, as in PR37807. This function could also + // take the address of a non-split function. When the linker tries to adjust + // its non-existent prologue, it would fail with an error. Mark the object + // file so that such failures are not errors. See this Go language bug-report + // https://go-review.googlesource.com/c/go/+/148819/ + if (StackSize == 0 && !MFI.hasTailCall()) { + MF.getMMI().setHasNosplitStack(true); return; + } MachineBasicBlock *allocMBB = MF.CreateMachineBasicBlock(); MachineBasicBlock *checkMBB = MF.CreateMachineBasicBlock();