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3a5d1f8cce
For a MC_GlobalAddress reference to a dso_local external GlobalValue with a definition, emit .Lfoo$local to avoid a relocation. -fno-pic and -fpie can infer dso_local but -fpic cannot. In the future, we can explore the possibility of inferring dso_local with -fpic. As the description of D73228 says, LLVM's existing IPO optimization behaviors (like -fno-semantic-interposition) and a previous assembly behavior give us enough license to be aggressive here. Reviewed By: rnk Differential Revision: https://reviews.llvm.org/D73230
74 lines
1.4 KiB
LLVM
74 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple=i686-pc-linux-gnu -relocation-model=pic | FileCheck %s
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; While many of these could be tail called, we don't do it because it forces
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; early binding.
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declare void @external()
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define hidden void @tailcallee_hidden() {
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entry:
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ret void
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}
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define void @tailcall_hidden() {
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entry:
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tail call void @tailcallee_hidden()
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ret void
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}
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; CHECK: tailcall_hidden:
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; CHECK: jmp .Ltailcallee_hidden$local
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define internal void @tailcallee_internal() {
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entry:
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ret void
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}
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define void @tailcall_internal() {
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entry:
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tail call void @tailcallee_internal()
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ret void
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}
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; CHECK: tailcall_internal:
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; CHECK: jmp tailcallee_internal
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define default void @tailcallee_default() {
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entry:
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ret void
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}
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define void @tailcall_default() {
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entry:
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tail call void @tailcallee_default()
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ret void
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}
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; CHECK: tailcall_default:
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; CHECK: calll tailcallee_default@PLT
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define void @tailcallee_default_implicit() {
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entry:
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ret void
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}
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define void @tailcall_default_implicit() {
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entry:
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tail call void @tailcallee_default_implicit()
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ret void
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}
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; CHECK: tailcall_default_implicit:
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; CHECK: calll tailcallee_default_implicit@PLT
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define void @tailcall_external() {
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tail call void @external()
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ret void
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}
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; CHECK: tailcall_external:
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; CHECK: calll external@PLT
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define void @musttail_external() {
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musttail call void @external()
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ret void
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}
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; CHECK: musttail_external:
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; CHECK: movl external@GOT
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; CHECK: jmpl
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