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Fix conflict value for metadata "Objective-C Garbage Collection" in the mix of swift and Objective-C bitcode
Summary: The change is to fix conflict value for metadata "Objective-C Garbage Collection" in the mix of swift and Objective-C bitcode. The purpose is to provide the support of LTO for swift and Objective-C mixed project. Reviewers: rjmccall, ahatanak, steven_wu Reviewed By: rjmccall, steven_wu Subscribers: manmanren, mehdi_amini, hiraditya, dexonsmith, llvm-commits, jinlin Tags: #llvm Differential Revision: https://reviews.llvm.org/D71219
This commit is contained in:
Jin Lin
parent
a15f08c44f
commit
47d7e3782b
@ -84,6 +84,15 @@ static void GetObjCImageInfo(Module &M, unsigned &Version, unsigned &Flags,
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} else if (Key == "Objective-C Image Info Section") {
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Section = cast<MDString>(MFE.Val)->getString();
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}
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// Backend generates L_OBJC_IMAGE_INFO from Swift ABI version + major + minor +
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// "Objective-C Garbage Collection".
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else if (Key == "Swift ABI Version") {
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Flags |= (mdconst::extract<ConstantInt>(MFE.Val)->getZExtValue()) << 8;
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} else if (Key == "Swift Major Version") {
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Flags |= (mdconst::extract<ConstantInt>(MFE.Val)->getZExtValue()) << 24;
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} else if (Key == "Swift Minor Version") {
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Flags |= (mdconst::extract<ConstantInt>(MFE.Val)->getZExtValue()) << 16;
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}
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}
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}
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@ -4022,6 +4022,12 @@ bool llvm::UpgradeModuleFlags(Module &M) {
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return false;
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bool HasObjCFlag = false, HasClassProperties = false, Changed = false;
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bool HasSwiftVersionFlag = false;
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uint8_t SwiftMajorVersion, SwiftMinorVersion;
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uint32_t SwiftABIVersion;
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auto Int8Ty = Type::getInt8Ty(M.getContext());
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auto Int32Ty = Type::getInt32Ty(M.getContext());
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for (unsigned I = 0, E = ModFlags->getNumOperands(); I != E; ++I) {
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MDNode *Op = ModFlags->getOperand(I);
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if (Op->getNumOperands() != 3)
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@ -4067,6 +4073,31 @@ bool llvm::UpgradeModuleFlags(Module &M) {
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}
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}
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}
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// IRUpgrader turns a i32 type "Objective-C Garbage Collection" into i8 value.
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// If the higher bits are set, it adds new module flag for swift info.
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if (ID->getString() == "Objective-C Garbage Collection") {
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auto Md = dyn_cast<ConstantAsMetadata>(Op->getOperand(2));
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if (Md) {
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assert(Md->getValue() && "Expected non-empty metadata");
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auto Type = Md->getValue()->getType();
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if (Type == Int8Ty)
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continue;
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unsigned Val = Md->getValue()->getUniqueInteger().getZExtValue();
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if ((Val & 0xff) != Val) {
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HasSwiftVersionFlag = true;
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SwiftABIVersion = (Val & 0xff00) >> 8;
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SwiftMajorVersion = (Val & 0xff000000) >> 24;
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SwiftMinorVersion = (Val & 0xff0000) >> 16;
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}
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Metadata *Ops[3] = {
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ConstantAsMetadata::get(ConstantInt::get(Int32Ty,Module::Error)),
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Op->getOperand(1),
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ConstantAsMetadata::get(ConstantInt::get(Int8Ty,Val & 0xff))};
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ModFlags->setOperand(I, MDNode::get(M.getContext(), Ops));
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Changed = true;
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}
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}
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}
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// "Objective-C Class Properties" is recently added for Objective-C. We
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@ -4080,6 +4111,16 @@ bool llvm::UpgradeModuleFlags(Module &M) {
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Changed = true;
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}
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if (HasSwiftVersionFlag) {
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M.addModuleFlag(Module::Error, "Swift ABI Version",
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SwiftABIVersion);
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M.addModuleFlag(Module::Error, "Swift Major Version",
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ConstantInt::get(Int8Ty, SwiftMajorVersion));
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M.addModuleFlag(Module::Error, "Swift Minor Version",
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ConstantInt::get(Int8Ty, SwiftMinorVersion));
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Changed = true;
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}
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return Changed;
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}
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21
test/Bitcode/upgrade-garbage-collection-for-objc.ll
Normal file
21
test/Bitcode/upgrade-garbage-collection-for-objc.ll
Normal file
@ -0,0 +1,21 @@
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; RUN: llvm-as %s -o - | llvm-dis - | FileCheck %s
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; The IRUpgrader turns a i32 type "Objective-C Garbage Collection"
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; into i8 value.
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target triple = "x86_64-apple-macosx10.15.0"
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!llvm.module.flags = !{!0, !1, !2, !3, !4, !5, !6, !7}
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!llvm.ident = !{!8}
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!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 10, i32 15]}
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!1 = !{i32 1, !"Objective-C Version", i32 2}
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!2 = !{i32 1, !"Objective-C Image Info Version", i32 0}
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!3 = !{i32 1, !"Objective-C Image Info Section", !"__DATA,__objc_imageinfo,regular,no_dead_strip"}
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!4 = !{i32 1, !"Objective-C Garbage Collection", i32 0}
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!5 = !{i32 1, !"Objective-C Class Properties", i32 64}
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!6 = !{i32 1, !"wchar_size", i32 4}
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!7 = !{i32 7, !"PIC Level", i32 2}
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!8 = !{!"Apple clang version 11.0.0 (clang-1100.0.33.12)"}
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; CHECK: !{{[0-9]+}} = !{i32 1, !"Objective-C Garbage Collection", i8 0}
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41
test/Bitcode/upgrade-garbage-collection-for-swift.ll
Normal file
41
test/Bitcode/upgrade-garbage-collection-for-swift.ll
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@ -0,0 +1,41 @@
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; RUN: llvm-as %s -o - | llvm-dis - | FileCheck %s
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; The IRUpgrader turns a i32 type "Objective-C Garbage Collection"
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; into i8 value. If the higher bits are set, it adds the module flag for swift info.
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target triple = "x86_64-apple-macosx10.15.0"
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@__swift_reflection_version = linkonce_odr hidden constant i16 3
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@llvm.used = appending global [1 x i8*] [i8* bitcast (i16* @__swift_reflection_version to i8*)], section "llvm.metadata", align 8
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define i32 @main(i32 %0, i8** %1) #0 {
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%3 = bitcast i8** %1 to i8*
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ret i32 0
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}
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attributes #0 = { "frame-pointer"="all" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sahf,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" }
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!llvm.module.flags = !{!0, !1, !2, !3, !4, !5, !6, !7, !8}
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!swift.module.flags = !{!9}
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!llvm.linker.options = !{!10, !11, !12}
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!llvm.asan.globals = !{!13}
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!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 10, i32 15]}
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!1 = !{i32 1, !"Objective-C Version", i32 2}
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!2 = !{i32 1, !"Objective-C Image Info Version", i32 0}
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!3 = !{i32 1, !"Objective-C Image Info Section", !"__DATA,__objc_imageinfo,regular,no_dead_strip"}
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!4 = !{i32 4, !"Objective-C Garbage Collection", i32 83953408}
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!5 = !{i32 1, !"Objective-C Class Properties", i32 64}
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!6 = !{i32 1, !"wchar_size", i32 4}
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!7 = !{i32 7, !"PIC Level", i32 2}
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!8 = !{i32 1, !"Swift Version", i32 7}
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!9 = !{!"standard-library", i1 false}
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!10 = !{!"-lswiftSwiftOnoneSupport"}
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!11 = !{!"-lswiftCore"}
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!12 = !{!"-lobjc"}
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!13 = !{[1 x i8*]* @llvm.used, null, null, i1 false, i1 true}
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; CHECK: !{{[0-9]+}} = !{i32 1, !"Objective-C Garbage Collection", i8 0}
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; CHECK: !{{[0-9]+}} = !{i32 1, !"Swift ABI Version", i32 7}
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; CHECK: !{{[0-9]+}} = !{i32 1, !"Swift Major Version", i8 5}
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; CHECK: !{{[0-9]+}} = !{i32 1, !"Swift Minor Version", i8 1}
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14
test/Linker/Inputs/empty-objc.ll
Normal file
14
test/Linker/Inputs/empty-objc.ll
Normal file
@ -0,0 +1,14 @@
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target triple = "x86_64-apple-macosx10.15.0"
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!llvm.module.flags = !{!0, !1, !2, !3, !4, !5, !6, !7}
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!llvm.ident = !{!8}
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!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 10, i32 15]}
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!1 = !{i32 1, !"Objective-C Version", i32 2}
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!2 = !{i32 1, !"Objective-C Image Info Version", i32 0}
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!3 = !{i32 1, !"Objective-C Image Info Section", !"__DATA,__objc_imageinfo,regular,no_dead_strip"}
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!4 = !{i32 1, !"Objective-C Garbage Collection", i32 0}
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!5 = !{i32 1, !"Objective-C Class Properties", i32 64}
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!6 = !{i32 1, !"wchar_size", i32 4}
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!7 = !{i32 7, !"PIC Level", i32 2}
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!8 = !{!"Apple clang version 11.0.0 (clang-1100.0.33.12)"}
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42
test/Linker/empty-swift.ll
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42
test/Linker/empty-swift.ll
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@ -0,0 +1,42 @@
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; RUN: llvm-link %s %p/Inputs/empty-objc.ll -S | FileCheck %s
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; It tests whether Swift bitcode can be successfully linked with Objecitive-C bitcode.
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; During the process, the IRUpgrader turns a i32 type "Objective-C Garbage Collection"
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; into i8 value. If the higher bits are set, it adds the module flag for swift info.
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target triple = "x86_64-apple-macosx10.15.0"
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@__swift_reflection_version = linkonce_odr hidden constant i16 3
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@llvm.used = appending global [1 x i8*] [i8* bitcast (i16* @__swift_reflection_version to i8*)], section "llvm.metadata", align 8
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define i32 @main(i32 %0, i8** %1) #0 {
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%3 = bitcast i8** %1 to i8*
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ret i32 0
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}
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attributes #0 = { "frame-pointer"="all" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sahf,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" }
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!llvm.module.flags = !{!0, !1, !2, !3, !4, !5, !6, !7, !8}
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!swift.module.flags = !{!9}
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!llvm.linker.options = !{!10, !11, !12}
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!llvm.asan.globals = !{!13}
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!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 10, i32 15]}
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!1 = !{i32 1, !"Objective-C Version", i32 2}
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!2 = !{i32 1, !"Objective-C Image Info Version", i32 0}
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!3 = !{i32 1, !"Objective-C Image Info Section", !"__DATA,__objc_imageinfo,regular,no_dead_strip"}
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!4 = !{i32 4, !"Objective-C Garbage Collection", i32 83953408}
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!5 = !{i32 1, !"Objective-C Class Properties", i32 64}
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!6 = !{i32 1, !"wchar_size", i32 4}
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!7 = !{i32 7, !"PIC Level", i32 2}
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!8 = !{i32 1, !"Swift Version", i32 7}
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!9 = !{!"standard-library", i1 false}
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!10 = !{!"-lswiftSwiftOnoneSupport"}
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!11 = !{!"-lswiftCore"}
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!12 = !{!"-lobjc"}
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!13 = !{[1 x i8*]* @llvm.used, null, null, i1 false, i1 true}
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; CHECK: !{{[0-9]+}} = !{i32 1, !"Objective-C Garbage Collection", i8 0}
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; CHECK: !{{[0-9]+}} = !{i32 1, !"Swift ABI Version", i32 7}
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; CHECK: !{{[0-9]+}} = !{i32 1, !"Swift Major Version", i8 5}
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; CHECK: !{{[0-9]+}} = !{i32 1, !"Swift Minor Version", i8 1}
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46
test/Object/objc-swift-mixed-imageinfo-macho.ll
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46
test/Object/objc-swift-mixed-imageinfo-macho.ll
Normal file
@ -0,0 +1,46 @@
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; RUN: llc -mtriple x86_64-apple-ios -filetype asm -o - %s | FileCheck %s
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; REQUIRES: x86-registered-target
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; It checks whether the backend generates IMAGE_INFO from Swift ABI version + major + minor + "Objective-C Garbage Collection".
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target triple = "x86_64-apple-macosx10.15.0"
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@llvm.used = appending global [1 x i8*] [i8* bitcast (i16* @__swift_reflection_version to i8*)], section "llvm.metadata", align 8
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@__swift_reflection_version = linkonce_odr hidden constant i16 3
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define i32 @main(i32 %0, i8** %1) #0 {
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%3 = bitcast i8** %1 to i8*
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ret i32 0
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}
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attributes #0 = { "frame-pointer"="all" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sahf,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" }
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!swift.module.flags = !{!0}
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!llvm.linker.options = !{!1, !2, !3}
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!llvm.asan.globals = !{!4}
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!llvm.module.flags = !{!5, !6, !7, !8, !9, !10, !11, !12, !13, !14, !15, !16}
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!llvm.ident = !{!17}
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!0 = !{!"standard-library", i1 false}
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!1 = !{!"-lswiftSwiftOnoneSupport"}
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!2 = !{!"-lswiftCore"}
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!3 = !{!"-lobjc"}
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!4 = !{[1 x i8*]* @llvm.used, null, null, i1 false, i1 true}
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!5 = !{i32 2, !"SDK Version", [2 x i32] [i32 10, i32 15]}
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!6 = !{i32 1, !"Objective-C Version", i32 2}
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!7 = !{i32 1, !"Objective-C Image Info Version", i32 0}
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!8 = !{i32 1, !"Objective-C Image Info Section", !"__DATA,__objc_imageinfo,regular,no_dead_strip"}
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!9 = !{i32 1, !"Objective-C Garbage Collection", i8 0}
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!10 = !{i32 1, !"Objective-C Class Properties", i32 64}
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!11 = !{i32 1, !"wchar_size", i32 4}
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!12 = !{i32 7, !"PIC Level", i32 2}
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!13 = !{i32 1, !"Swift Version", i32 7}
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!14 = !{i32 1, !"Swift ABI Version", i32 7}
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!15 = !{i32 1, !"Swift Major Version", i8 5}
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!16 = !{i32 1, !"Swift Minor Version", i8 1}
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!17 = !{!"Apple clang version 11.0.0 (clang-1100.0.33.12)"}
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; CHECK: .section __DATA,__objc_imageinfo,regular,no_dead_strip
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; CHECK: L_OBJC_IMAGE_INFO:
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; CHECK: .long 0
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; CHECK: .long 83953472
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