153 lines
5.3 KiB
LLVM
153 lines
5.3 KiB
LLVM
; RUN: llc < %s -mtriple=armv7k-apple-watchos2.0 | FileCheck %s
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; RUN: llc < %s -mtriple=armv7k-apple-watchos2.0 -enable-shrink-wrap=true | FileCheck %s
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; RUN: llc < %s -mtriple=armv7-apple-ios8.0 | FileCheck %s
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; RUN: llc < %s -mtriple=armv7-apple-ios8.0 -enable-shrink-wrap=true | FileCheck %s
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; RUN: llc < %s -mtriple=armv7k-apple-watchos2.0 -O0 | FileCheck --check-prefix=CHECK-O0 --check-prefix=WATCH-O0 %s
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; RUN: llc < %s -mtriple=armv7-apple-ios8.0 -O0 | FileCheck --check-prefix=CHECK-O0 --check-prefix=IOS-O0 %s
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; RUN: llc < %s -mtriple=thumbv7-apple-ios8.0 | FileCheck --check-prefix=THUMB %s
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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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%class.C = type { i32 }
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@tC = internal thread_local global %class.C zeroinitializer, align 4
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declare %struct.S* @_ZN1SC1Ev(%struct.S* returned)
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declare %struct.S* @_ZN1SD1Ev(%struct.S* returned)
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declare i32 @_tlv_atexit(void (i8*)*, i8*, i8*)
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; Make sure Epilog does not overwrite an explicitly-handled CSR in CXX_FAST_TLS.
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; THUMB-LABEL: _ZTW2sg
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; THUMB: push {{.*}}lr
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; THUMB: blx
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; THUMB: bne [[TH_end:.?LBB0_[0-9]+]]
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; THUMB: blx
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; THUMB: tlv_atexit
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; THUMB: [[TH_end]]:
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; THUMB: blx
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; THUMB: r4
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; THUMB: pop {{.*}}r4
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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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%call.i.i = tail call %struct.S* @_ZN1SC1Ev(%struct.S* nonnull @sg)
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%1 = tail call i32 @_tlv_atexit(void (i8*)* nonnull bitcast (%struct.S* (%struct.S*)* @_ZN1SD1Ev to void (i8*)*), i8* nonnull getelementptr inbounds (%struct.S, %struct.S* @sg, i64 0, i32 0), i8* nonnull @__dso_handle)
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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: _ZTW2sg
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; CHECK: push {r4, r5, r7, lr}
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; CHECK: push {r11, r12}
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; CHECK-NOT: vpush {d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26, d27, d28, d29, d30, d31}
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; CHECK-NOT: vpush {d0, d1, d2, d3, d4, d5, d6, d7}
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; CHECK: blx
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; CHECK: bne [[BB_end:.?LBB0_[0-9]+]]
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; CHECK: blx
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; CHECK: tlv_atexit
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; CHECK: [[BB_end]]:
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; CHECK: blx
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; CHECK-NOT: vpop {d0, d1, d2, d3, d4, d5, d6, d7}
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; CHECK-NOT: vpop {d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26, d27, d28, d29, d30, d31}
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; CHECK-NOT: pop {r9, r12}
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; CHECK-NOT: pop {r1, r2, r3, r4, r7, pc}
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; CHECK: pop {r4, r5, r7, pc}
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; CHECK-O0-LABEL: _ZTW2sg
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; WATCH-O0: push {r1, r2, r3, r6, r7, lr}
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; IOS-O0: push {r1, r2, r3, r7, lr}
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; CHECK-O0: push {r9, r12}
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; CHECK-O0: vpush {d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26, d27, d28, d29, d30, d31}
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; CHECK-O0: vpush {d0, d1, d2, d3, d4, d5, d6, d7}
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; CHECK-O0: blx
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; CHECK-O0: bne [[BB_end:.?LBB0_[0-9]+]]
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; CHECK-O0: blx
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; CHECK-O0: tlv_atexit
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; CHECK-O0: [[BB_end]]:
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; CHECK-O0: blx
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; CHECK-O0: vpop {d0, d1, d2, d3, d4, d5, d6, d7}
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; CHECK-O0: vpop {d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26, d27, d28, d29, d30, d31}
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; CHECK-O0: pop {r9, r12}
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; WATCH-O0: pop {r1, r2, r3, r6, r7, pc}
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; IOS-O0: pop {r1, r2, r3, r7, pc}
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; CHECK-LABEL: _ZTW4sum1
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; CHECK-NOT: push {r1, r2, r3, r4, r7, lr}
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; CHECK-NOT: push {r9, r12}
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; CHECK-NOT: vpush {d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26, d27, d28, d29, d30, d31}
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; CHECK-NOT: vpush {d0, d1, d2, d3, d4, d5, d6, d7}
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; CHECK: blx
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; CHECK-O0-LABEL: _ZTW4sum1
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; CHECK-O0-NOT: vpush
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; CHECK-O0-NOT: vstr
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; CHECK-O0-NOT: vpop
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; CHECK-O0-NOT: vldr
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; CHECK-O0: pop
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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 generate spilling/reloading of the CSRs.
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; CHECK-O0-LABEL: tls_test2
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; CHECK-O0: push
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; CHECK-O0-NOT: vpush
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; CHECK-O0-NOT: vstr
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; CHECK-O0: tls_helper
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; CHECK-O0-NOT: vpop
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; CHECK-O0-NOT: vldr
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; CHECK-O0: pop
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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: bl __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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declare void @somefunc()
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define cxx_fast_tlscc void @test_ccmismatch_notail() {
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; A tail call is not possible here because somefunc does not preserve enough
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; registers.
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; CHECK-LABEL: test_ccmismatch_notail:
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; CHECK-NOT: b _somefunc
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; CHECK: bl _somefunc
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tail call void @somefunc()
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ret void
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}
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declare cxx_fast_tlscc void @some_fast_tls_func()
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define void @test_ccmismatch_tail() {
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; We can perform a tail call here because some_fast_tls_func preserves all
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; necessary registers (and more).
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; CHECK-LABEL: test_ccmismatch_tail:
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; CHECK-NOT: bl _some_fast_tls_func
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; CHECK: b _some_fast_tls_func
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tail call cxx_fast_tlscc void @some_fast_tls_func()
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ret void
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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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