forked from OSchip/llvm-project
172 lines
5.0 KiB
LLVM
172 lines
5.0 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=x86_64-apple-darwin | FileCheck %s
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; TLS function were wrongly model and after fixing that, shrink-wrapping
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; cannot help here. To achieve the expected lowering, we need to playing
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; tricks similar to AArch64 fast TLS calling convention (r255821).
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; Applying tricks on x86-64 similar to r255821.
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -enable-shrink-wrap=true | FileCheck %s
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -O0 | FileCheck %s --check-prefix=CHECK-O0
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%struct.S = type { i8 }
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@sg = internal thread_local global %struct.S zeroinitializer, align 1
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@__dso_handle = external global i8
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@__tls_guard = internal thread_local unnamed_addr global i1 false
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@sum1 = internal thread_local global i32 0, align 4
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declare void @_ZN1SC1Ev(%struct.S*)
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declare void @_ZN1SD1Ev(%struct.S*)
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declare i32 @_tlv_atexit(void (i8*)*, i8*, i8*)
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; Every GPR should be saved - except rdi, rax, and rsp
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; CHECK-LABEL: _ZTW2sg
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; CHECK-NOT: pushq %r11
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; CHECK-NOT: pushq %r10
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; CHECK-NOT: pushq %r9
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; CHECK-NOT: pushq %r8
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; CHECK-NOT: pushq %rsi
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; CHECK-NOT: pushq %rdx
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; CHECK-NOT: pushq %rcx
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; CHECK-NOT: pushq %rbx
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; CHECK: callq
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; CHECK: jne
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; CHECK: callq
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; CHECK: tlv_atexit
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; CHECK: callq
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; CHECK-NOT: popq %rbx
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; CHECK-NOT: popq %rcx
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; CHECK-NOT: popq %rdx
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; CHECK-NOT: popq %rsi
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; CHECK-NOT: popq %r8
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; CHECK-NOT: popq %r9
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; CHECK-NOT: popq %r10
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; CHECK-NOT: popq %r11
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; CHECK-O0-LABEL: _ZTW2sg
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; CHECK-O0: pushq %r11
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; CHECK-O0: pushq %r10
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; CHECK-O0: pushq %r9
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; CHECK-O0: pushq %r8
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; CHECK-O0: pushq %rsi
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; CHECK-O0: pushq %rdx
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; CHECK-O0: pushq %rcx
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; CHECK-O0: callq
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; CHECK-O0: jne
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; CHECK-O0: callq
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; CHECK-O0: tlv_atexit
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; CHECK-O0: callq
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; CHECK-O0: popq %rcx
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; CHECK-O0: popq %rdx
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; CHECK-O0: popq %rsi
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; CHECK-O0: popq %r8
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; CHECK-O0: popq %r9
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; CHECK-O0: popq %r10
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; CHECK-O0: popq %r11
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define cxx_fast_tlscc nonnull %struct.S* @_ZTW2sg() nounwind {
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%.b.i = load i1, i1* @__tls_guard, align 1
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br i1 %.b.i, label %__tls_init.exit, label %init.i
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init.i:
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store i1 true, i1* @__tls_guard, align 1
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tail call void @_ZN1SC1Ev(%struct.S* nonnull @sg) #2
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%1 = tail call i32 @_tlv_atexit(void (i8*)* nonnull bitcast (void (%struct.S*)* @_ZN1SD1Ev to void (i8*)*), i8* nonnull getelementptr inbounds (%struct.S, %struct.S* @sg, i64 0, i32 0), i8* nonnull @__dso_handle) #2
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br label %__tls_init.exit
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__tls_init.exit:
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ret %struct.S* @sg
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}
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; CHECK-LABEL: _ZTW4sum1
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; CHECK-NOT: pushq %r11
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; CHECK-NOT: pushq %r10
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; CHECK-NOT: pushq %r9
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; CHECK-NOT: pushq %r8
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; CHECK-NOT: pushq %rsi
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; CHECK-NOT: pushq %rdx
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; CHECK-NOT: pushq %rcx
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; CHECK-NOT: pushq %rbx
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; CHECK: callq
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; CHECK-O0-LABEL: _ZTW4sum1
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; CHECK-O0-NOT: pushq %r11
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; CHECK-O0-NOT: pushq %r10
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; CHECK-O0-NOT: pushq %r9
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; CHECK-O0-NOT: pushq %r8
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; CHECK-O0-NOT: pushq %rsi
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; CHECK-O0-NOT: pushq %rdx
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; CHECK-O0-NOT: pushq %rcx
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; CHECK-O0-NOT: pushq %rbx
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; CHECK-O0-NOT: movq %r11
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; CHECK-O0-NOT: movq %r10
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; CHECK-O0-NOT: movq %r9
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; CHECK-O0-NOT: movq %r8
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; CHECK-O0-NOT: movq %rsi
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; CHECK-O0-NOT: movq %rdx
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; CHECK-O0-NOT: movq %rcx
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; CHECK-O0-NOT: movq %rbx
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; CHECK-O0: callq
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define cxx_fast_tlscc nonnull i32* @_ZTW4sum1() nounwind {
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ret i32* @sum1
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}
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; Make sure at O0 we don't overwrite RBP.
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; CHECK-O0-LABEL: _ZTW4sum2
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; CHECK-O0: pushq %rbp
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; CHECK-O0: movq %rsp, %rbp
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; CHECK-O0-NOT: movq %r{{.*}}, (%rbp)
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define cxx_fast_tlscc i32* @_ZTW4sum2() #0 {
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ret i32* @sum1
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}
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; Make sure at O0, we don't generate spilling/reloading of the CSRs.
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; CHECK-O0-LABEL: tls_test2
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; CHECK-O0-NOT: pushq %r11
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; CHECK-O0-NOT: pushq %r10
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; CHECK-O0-NOT: pushq %r9
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; CHECK-O0-NOT: pushq %r8
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; CHECK-O0-NOT: pushq %rsi
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; CHECK-O0-NOT: pushq %rdx
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; CHECK-O0: callq {{.*}}tls_helper
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; CHECK-O0-NOT: popq %rdx
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; CHECK-O0-NOT: popq %rsi
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; CHECK-O0-NOT: popq %r8
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; CHECK-O0-NOT: popq %r9
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; CHECK-O0-NOT: popq %r10
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; CHECK-O0-NOT: popq %r11
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; CHECK-O0: ret
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%class.C = type { i32 }
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@tC = internal thread_local global %class.C zeroinitializer, align 4
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declare cxx_fast_tlscc void @tls_helper()
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define cxx_fast_tlscc %class.C* @tls_test2() #1 {
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call cxx_fast_tlscc void @tls_helper()
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ret %class.C* @tC
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}
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; Make sure we do not allow tail call when caller and callee have different
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; calling conventions.
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declare %class.C* @_ZN1CD1Ev(%class.C* readnone returned %this)
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; CHECK-LABEL: tls_test
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; CHECK: callq {{.*}}tlv_atexit
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define cxx_fast_tlscc void @tls_test() {
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entry:
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store i32 0, i32* getelementptr inbounds (%class.C, %class.C* @tC, i64 0, i32 0), align 4
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%0 = tail call i32 @_tlv_atexit(void (i8*)* bitcast (%class.C* (%class.C*)* @_ZN1CD1Ev to void (i8*)*), i8* bitcast (%class.C* @tC to i8*), i8* nonnull @__dso_handle) #1
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ret void
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}
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@ssp_var = internal thread_local global i8 0, align 1
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; CHECK-LABEL: test_ssp
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; CHECK-NOT: pushq %r11
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; CHECK-NOT: pushq %r10
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; CHECK-NOT: pushq %r9
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; CHECK-NOT: pushq %r8
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; CHECK-NOT: pushq %rsi
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; CHECK-NOT: pushq %rdx
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; CHECK-NOT: pushq %rcx
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; CHECK-NOT: pushq %rbx
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; CHECK: callq
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define cxx_fast_tlscc nonnull i8* @test_ssp() #2 {
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ret i8* @ssp_var
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}
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attributes #0 = { nounwind "no-frame-pointer-elim"="true" }
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attributes #1 = { nounwind }
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attributes #2 = { nounwind sspreq }
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