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1; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -tailcallopt | FileCheck %s --check-prefixes=SDAG,COMMON2; RUN: llc -global-isel -global-isel-abort=1 -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -tailcallopt | FileCheck %s --check-prefixes=GISEL,COMMON3 4declare fastcc void @callee_stack0()5declare fastcc void @callee_stack8([8 x i64], i64)6declare fastcc void @callee_stack16([8 x i64], i64, i64)7declare extern_weak fastcc void @callee_weak()8 9define fastcc void @caller_to0_from0() nounwind {10; COMMON-LABEL: caller_to0_from0:11; COMMON-NEXT: // %bb.12 13 tail call fastcc void @callee_stack0()14 ret void15 16; COMMON-NEXT: b callee_stack017}18 19define fastcc void @caller_to0_from8([8 x i64], i64) #0 {20; COMMON-LABEL: caller_to0_from8:21 22 tail call fastcc void @callee_stack0()23 ret void24 25; COMMON: add sp, sp, #1626; COMMON: .cfi_def_cfa_offset -1627; COMMON-NEXT: b callee_stack028}29 30define fastcc void @caller_to8_from0() #0 {31; COMMON-LABEL: caller_to8_from0:32 33; Key point is that the "42" should go #16 below incoming stack34; pointer (we didn't have arg space to reuse).35 tail call fastcc void @callee_stack8([8 x i64] undef, i64 42)36 ret void37 38; COMMON: str {{x[0-9]+}}, [sp, #-16]!39; COMMON-NEXT: .cfi_def_cfa_offset 1640; COMMON-NEXT: b callee_stack841}42 43define fastcc void @caller_to8_from8([8 x i64], i64 %a) #0 {44; COMMON-LABEL: caller_to8_from8:45; COMMON-NOT: sub sp,46 47; Key point is that the "%a" should go where at SP on entry.48 tail call fastcc void @callee_stack8([8 x i64] undef, i64 42)49 ret void50 51; COMMON: str {{x[0-9]+}}, [sp]52; COMMON-NEXT: b callee_stack853}54 55define fastcc void @caller_to16_from8([8 x i64], i64 %a) #0 {56; COMMON-LABEL: caller_to16_from8:57; COMMON-NOT: sub sp,58 59; Important point is that the call reuses the "dead" argument space60; above %a on the stack. If it tries to go below incoming-SP then the61; callee will not deallocate the space, even in fastcc.62 tail call fastcc void @callee_stack16([8 x i64] undef, i64 42, i64 2)63 64; COMMON: stp {{x[0-9]+}}, {{x[0-9]+}}, [sp]65; COMMON-NEXT: b callee_stack1666 ret void67}68 69 70define fastcc void @caller_to8_from24([8 x i64], i64 %a, i64 %b, i64 %c) #0 {71; COMMON-LABEL: caller_to8_from24:72; COMMON-NOT: sub sp,73 74; Key point is that the "%a" should go where at #16 above SP on entry.75 tail call fastcc void @callee_stack8([8 x i64] undef, i64 42)76 ret void77 78; COMMON: str {{x[0-9]+}}, [sp, #16]!79; COMMON: .cfi_def_cfa_offset -1680; COMMON-NEXT: b callee_stack881}82 83 84define fastcc void @caller_to16_from16([8 x i64], i64 %a, i64 %b) #0 {85; COMMON-LABEL: caller_to16_from16:86; COMMON-NOT: sub sp,87 88; Here we want to make sure that both loads happen before the stores:89; otherwise either %a or %b will be wrongly clobbered.90 tail call fastcc void @callee_stack16([8 x i64] undef, i64 %b, i64 %a)91 ret void92 93; COMMON: ldp {{x[0-9]+}}, {{x[0-9]+}}, [sp]94; COMMON: stp {{x[0-9]+}}, {{x[0-9]+}}, [sp]95; COMMON-NEXT: b callee_stack1696}97 98define fastcc void @disable_tail_calls() nounwind "disable-tail-calls"="true" {99; COMMON-LABEL: disable_tail_calls:100; COMMON-NEXT: // %bb.101 102 tail call fastcc void @callee_stack0()103 ret void104 105; COMMON: bl callee_stack0106; COMMON: ret107}108 109; Weakly-referenced extern functions cannot be tail-called, as AAELF does110; not define the behaviour of branch instructions to undefined weak symbols.111define fastcc void @caller_weak() #0 {112; COMMON-LABEL: caller_weak:113; COMMON: bl callee_weak114 tail call void @callee_weak()115 ret void116}117 118declare { [2 x float] } @get_vec2()119 120define { [3 x float] } @test_add_elem() #0 {121; SDAG-LABEL: test_add_elem:122; SDAG: bl get_vec2123; SDAG: fmov s2, #1.0124; SDAG: ret125; GISEL-LABEL: test_add_elem:126; GISEL: str x30, [sp, #-16]!127; GISEL: bl get_vec2128; GISEL: fmov s2, #1.0129; GISEL: ldr x30, [sp], #16130; GISEL: ret131 132 %call = tail call { [2 x float] } @get_vec2()133 %arr = extractvalue { [2 x float] } %call, 0134 %arr.0 = extractvalue [2 x float] %arr, 0135 %arr.1 = extractvalue [2 x float] %arr, 1136 137 %res.0 = insertvalue { [3 x float] } undef, float %arr.0, 0, 0138 %res.01 = insertvalue { [3 x float] } %res.0, float %arr.1, 0, 1139 %res.012 = insertvalue { [3 x float] } %res.01, float 1.000000e+00, 0, 2140 ret { [3 x float] } %res.012141}142 143declare double @get_double()144define { double, [2 x double] } @test_mismatched_insert() #0 {145; COMMON-LABEL: test_mismatched_insert:146; COMMON: bl get_double147; COMMON: bl get_double148; COMMON: bl get_double149; COMMON: ret150 151 %val0 = call double @get_double()152 %val1 = call double @get_double()153 %val2 = tail call double @get_double()154 155 %res.0 = insertvalue { double, [2 x double] } undef, double %val0, 0156 %res.01 = insertvalue { double, [2 x double] } %res.0, double %val1, 1, 0157 %res.012 = insertvalue { double, [2 x double] } %res.01, double %val2, 1, 1158 159 ret { double, [2 x double] } %res.012160}161 162attributes #0 = { uwtable }