Index: lib/Target/AArch64/AArch64AsmPrinter.cpp =================================================================== --- lib/Target/AArch64/AArch64AsmPrinter.cpp +++ lib/Target/AArch64/AArch64AsmPrinter.cpp @@ -578,9 +578,16 @@ const std::vector &JT = MJTI->getJumpTables(); if (JT.empty()) return; + const Function &F = MF->getFunction(); const TargetLoweringObjectFile &TLOF = getObjFileLowering(); - MCSection *ReadOnlySec = TLOF.getSectionForJumpTable(MF->getFunction(), TM); - OutStreamer->SwitchSection(ReadOnlySec); + bool JTInDiffSection = !TLOF.shouldPutJumpTableInFunctionSection( + MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32, + F); + if (JTInDiffSection) { + // Drop it in the readonly section. + MCSection *ReadOnlySec = TLOF.getSectionForJumpTable(F, TM); + OutStreamer->SwitchSection(ReadOnlySec); + } auto AFI = MF->getInfo(); for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) { Index: lib/Target/AArch64/AArch64TargetMachine.cpp =================================================================== --- lib/Target/AArch64/AArch64TargetMachine.cpp +++ lib/Target/AArch64/AArch64TargetMachine.cpp @@ -208,8 +208,8 @@ static Reloc::Model getEffectiveRelocModel(const Triple &TT, Optional RM) { - // AArch64 Darwin is always PIC. - if (TT.isOSDarwin()) + // AArch64 Darwin and Windows are always PIC. + if (TT.isOSDarwin() || TT.isOSWindows()) return Reloc::PIC_; // On ELF platforms the default static relocation model has a smart enough // linker to cope with referencing external symbols defined in a shared Index: test/CodeGen/AArch64/win64-jumptable.ll =================================================================== --- /dev/null +++ test/CodeGen/AArch64/win64-jumptable.ll @@ -0,0 +1,48 @@ +; RUN: llc -o - %s -mtriple=aarch64-windows -aarch64-enable-compress-jump-tables=0 | FileCheck %s + +define void @f(i32 %x) { +entry: + switch i32 %x, label %sw.epilog [ + i32 0, label %sw.bb + i32 1, label %sw.bb1 + i32 2, label %sw.bb2 + i32 3, label %sw.bb3 + ] + +sw.bb: ; preds = %entry + tail call void @g(i32 0) #2 + br label %sw.epilog + +sw.bb1: ; preds = %entry + tail call void @g(i32 1) #2 + br label %sw.epilog + +sw.bb2: ; preds = %entry + tail call void @g(i32 2) #2 + br label %sw.epilog + +sw.bb3: ; preds = %entry + tail call void @g(i32 3) #2 + br label %sw.epilog + +sw.epilog: ; preds = %entry, %sw.bb3, %sw.bb2, %sw.bb1, %sw.bb + tail call void @g(i32 10) #2 + ret void +} + +declare void @g(i32) + +; CHECK: .text +; CHECK: f: +; CHECK: .seh_proc f +; CHECK: b g +; CHECK-NEXT: .p2align 2 +; CHECK-NEXT: .LJTI0_0: +; CHECK: .word .LBB0_2-.LJTI0_0 +; CHECK: .word .LBB0_3-.LJTI0_0 +; CHECK: .word .LBB0_4-.LJTI0_0 +; CHECK: .word .LBB0_5-.LJTI0_0 +; CHECK: .section .xdata,"dr" +; CHECK: .seh_handlerdata +; CHECK: .text +; CHECK: .seh_endproc