1 ; Without -only-needed we should lazy link linkonce globals, and the 2 ; metadata reference should not cause them to be linked. 3 ; RUN: llvm-link -S %S/Inputs/only-needed-named-metadata.ll %S/only-needed-named-metadata.ll | FileCheck %s 4 ; CHECK-NOT:@U_linkonce 5 ; CHECK-NOT:@unused_linkonce() 6 7 ; With -only-needed the metadata references should not cause any of the 8 ; otherwise unreferenced globals to be linked. This also ensures that the 9 ; metadata references don't provoke the module linker to create declarations, 10 ; which are illegal for aliases and globals in comdats. 11 ; Note that doing -only-needed with the comdat shown below leads to a only 12 ; part of the comdat group being linked, which is not technically correct. 13 ; RUN: llvm-link -S -only-needed %S/Inputs/only-needed-named-metadata.ll %S/only-needed-named-metadata.ll | FileCheck %s -check-prefix=ONLYNEEDED 14 ; RUN: llvm-link -S -internalize -only-needed %S/Inputs/only-needed-named-metadata.ll %S/only-needed-named-metadata.ll | FileCheck %s -check-prefix=ONLYNEEDED 15 ; ONLYNEEDED-NOT:@U 16 ; ONLYNEEDED-NOT:@U_linkonce 17 ; ONLYNEEDED-NOT:@unused() 18 ; ONLYNEEDED-NOT:@unused_linkonce() 19 ; ONLYNEEDED-NOT:@linkoncealias 20 ; ONLYNEEDED-NOT:@linkoncefunc2() 21 ; ONLYNEEDED-NOT:@weakalias 22 ; ONLYNEEDED-NOT:@globalfunc1() 23 ; ONLYNEEDED-NOT:@analias 24 ; ONLYNEEDED-NOT:@globalfunc2() 25 26 ; Test -only-needed link with the modules preserved instead of freeing to 27 ; catch any cross-module references to metadata, which the bitcode writer 28 ; will assert on. 29 ; RUN: llvm-link -preserve-modules -o %t3.bc -only-needed %S/Inputs/only-needed-named-metadata.ll %S/only-needed-named-metadata.ll 30 31 @X = global i32 5 32 @U = global i32 6 33 @U_linkonce = linkonce_odr hidden global i32 6 34 define i32 @foo() { ret i32 7 } 35 define i32 @unused() { ret i32 8 } 36 define linkonce_odr hidden i32 @unused_linkonce() { ret i32 8 } 37 @linkoncealias = alias void (...), bitcast (void ()* @linkoncefunc2 to void (...)*) 38 39 @weakalias = weak alias void (...), bitcast (void ()* @globalfunc1 to void (...)*) 40 @analias = alias void (...), bitcast (void ()* @globalfunc2 to void (...)*) 41 42 define void @globalfunc1() #0 { 43 entry: 44 ret void 45 } 46 47 define void @globalfunc2() #0 { 48 entry: 49 ret void 50 } 51 52 $linkoncefunc2 = comdat any 53 define linkonce_odr void @linkoncefunc2() #0 comdat { 54 entry: 55 ret void 56 } 57 58 !llvm.named = !{!0, !1, !2, !3, !4, !5, !6} 59 !0 = !{i32 ()* @unused} 60 !1 = !{i32* @U} 61 !2 = !{i32 ()* @unused_linkonce} 62 !3 = !{i32* @U_linkonce} 63 !4 = !{void (...)* @weakalias} 64 !5 = !{void (...)* @analias} 65 !6 = !{void (...)* @linkoncealias} 66
