6b6c3aaeac
They are currently implicit because TargetMachine::shouldAssumeDSOLocal implies dso_local. For such function declarations, clang -fno-pic emits the dso_local specifier. Adding explicit dso_local makes these tests align with the clang behavior and helps implementing an option to use GOT indirection when taking the address of a function symbol in -fno-pic (to avoid a canonical PLT entry (SHN_UNDEF with non-zero st_value)).
67 lines
1.6 KiB
LLVM
67 lines
1.6 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-pc-linux | FileCheck %s
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declare dso_local win64cc void @win64_callee(i32)
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declare dso_local win64cc void (i32)* @win64_indirect()
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declare dso_local win64cc void @win64_other(i32)
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declare dso_local void @sysv_callee(i32)
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declare dso_local void (i32)* @sysv_indirect()
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declare dso_local void @sysv_other(i32)
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define void @sysv_caller(i32 %p1) {
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entry:
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tail call win64cc void @win64_callee(i32 %p1)
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ret void
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}
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; CHECK-LABEL: sysv_caller:
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; CHECK: subq $40, %rsp
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; CHECK: callq win64_callee
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; CHECK: addq $40, %rsp
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; CHECK: retq
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define win64cc void @win64_caller(i32 %p1) {
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entry:
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tail call void @sysv_callee(i32 %p1)
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ret void
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}
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; CHECK-LABEL: win64_caller:
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; CHECK: callq sysv_callee
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; CHECK: retq
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define void @sysv_matched(i32 %p1) {
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tail call void @sysv_callee(i32 %p1)
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ret void
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}
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; CHECK-LABEL: sysv_matched:
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; CHECK: jmp sysv_callee # TAILCALL
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define win64cc void @win64_matched(i32 %p1) {
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tail call win64cc void @win64_callee(i32 %p1)
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ret void
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}
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; CHECK-LABEL: win64_matched:
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; CHECK: jmp win64_callee # TAILCALL
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define win64cc void @win64_indirect_caller(i32 %p1) {
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%1 = call win64cc void (i32)* @win64_indirect()
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call win64cc void @win64_other(i32 0)
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tail call win64cc void %1(i32 %p1)
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ret void
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}
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; CHECK-LABEL: win64_indirect_caller:
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; CHECK: jmpq *%{{rax|rcx|rdx|r8|r9|r11}} # TAILCALL
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define void @sysv_indirect_caller(i32 %p1) {
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%1 = call void (i32)* @sysv_indirect()
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call void @sysv_other(i32 0)
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tail call void %1(i32 %p1)
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ret void
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}
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; CHECK-LABEL: sysv_indirect_caller:
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; CHECK: jmpq *%{{rax|rcx|rdx|rsi|rdi|r8|r9|r11}} # TAILCALL
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