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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=i686-- -tailcallopt | FileCheck %s3 4; With -tailcallopt, CodeGen guarantees a tail call optimization5; for all of these.6 7declare fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4)8 9define dso_local fastcc i32 @tailcaller(i32 %in1, i32 %in2) nounwind {10; CHECK-LABEL: tailcaller:11; CHECK: # %bb.0: # %entry12; CHECK-NEXT: subl $16, %esp13; CHECK-NEXT: movl %ecx, {{[0-9]+}}(%esp)14; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax15; CHECK-NEXT: movl %edx, {{[0-9]+}}(%esp)16; CHECK-NEXT: movl %eax, {{[0-9]+}}(%esp)17; CHECK-NEXT: addl $8, %esp18; CHECK-NEXT: jmp tailcallee@PLT # TAILCALL19entry:20 %tmp11 = tail call fastcc i32 @tailcallee(i32 %in1, i32 %in2, i32 %in1, i32 %in2)21 ret i32 %tmp1122}23 24declare fastcc ptr @alias_callee()25 26define fastcc noalias ptr @noalias_caller() nounwind {27; CHECK-LABEL: noalias_caller:28; CHECK: # %bb.0:29; CHECK-NEXT: jmp alias_callee@PLT # TAILCALL30 %p = tail call fastcc ptr @alias_callee()31 ret ptr %p32}33 34declare fastcc noalias ptr @noalias_callee()35 36define dso_local fastcc ptr @alias_caller() nounwind {37; CHECK-LABEL: alias_caller:38; CHECK: # %bb.0:39; CHECK-NEXT: jmp noalias_callee@PLT # TAILCALL40 %p = tail call fastcc noalias ptr @noalias_callee()41 ret ptr %p42}43 44declare fastcc i32 @i32_callee()45 46define dso_local fastcc i32 @ret_undef() nounwind {47; CHECK-LABEL: ret_undef:48; CHECK: # %bb.0:49; CHECK-NEXT: jmp i32_callee@PLT # TAILCALL50 %p = tail call fastcc i32 @i32_callee()51 ret i32 undef52}53 54declare fastcc void @does_not_return()55 56define dso_local fastcc i32 @noret() nounwind {57; CHECK-LABEL: noret:58; CHECK: # %bb.0:59; CHECK-NEXT: jmp does_not_return@PLT # TAILCALL60 tail call fastcc void @does_not_return()61 unreachable62}63 64define dso_local fastcc void @void_test(i32, i32, i32, i32) {65; CHECK-LABEL: void_test:66; CHECK: # %bb.0: # %entry67; CHECK-NEXT: pushl %esi68; CHECK-NEXT: .cfi_def_cfa_offset 869; CHECK-NEXT: subl $8, %esp70; CHECK-NEXT: .cfi_def_cfa_offset 1671; CHECK-NEXT: .cfi_offset %esi, -872; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax73; CHECK-NEXT: movl {{[0-9]+}}(%esp), %esi74; CHECK-NEXT: movl %esi, {{[0-9]+}}(%esp)75; CHECK-NEXT: movl %eax, {{[0-9]+}}(%esp)76; CHECK-NEXT: addl $8, %esp77; CHECK-NEXT: .cfi_def_cfa_offset 878; CHECK-NEXT: popl %esi79; CHECK-NEXT: .cfi_def_cfa_offset 480; CHECK-NEXT: jmp void_test # TAILCALL81 entry:82 tail call fastcc void @void_test( i32 %0, i32 %1, i32 %2, i32 %3)83 ret void84}85 86define dso_local fastcc i1 @i1test(i32, i32, i32, i32) {87; CHECK-LABEL: i1test:88; CHECK: # %bb.0: # %entry89; CHECK-NEXT: pushl %esi90; CHECK-NEXT: .cfi_def_cfa_offset 891; CHECK-NEXT: subl $8, %esp92; CHECK-NEXT: .cfi_def_cfa_offset 1693; CHECK-NEXT: .cfi_offset %esi, -894; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax95; CHECK-NEXT: movl {{[0-9]+}}(%esp), %esi96; CHECK-NEXT: movl %esi, {{[0-9]+}}(%esp)97; CHECK-NEXT: movl %eax, {{[0-9]+}}(%esp)98; CHECK-NEXT: addl $8, %esp99; CHECK-NEXT: .cfi_def_cfa_offset 8100; CHECK-NEXT: popl %esi101; CHECK-NEXT: .cfi_def_cfa_offset 4102; CHECK-NEXT: jmp i1test # TAILCALL103 entry:104 %4 = tail call fastcc i1 @i1test( i32 %0, i32 %1, i32 %2, i32 %3)105 ret i1 %4106}107