| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=i686-- -tailcallopt | FileCheck %s |
| |
| ; With -tailcallopt, CodeGen guarantees a tail call optimization |
| ; for all of these. |
| |
| declare fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4) |
| |
| define dso_local fastcc i32 @tailcaller(i32 %in1, i32 %in2) nounwind { |
| ; CHECK-LABEL: tailcaller: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: subl $16, %esp |
| ; CHECK-NEXT: movl %ecx, {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax |
| ; CHECK-NEXT: movl %edx, {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: movl %eax, {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: addl $8, %esp |
| ; CHECK-NEXT: jmp tailcallee@PLT # TAILCALL |
| entry: |
| %tmp11 = tail call fastcc i32 @tailcallee(i32 %in1, i32 %in2, i32 %in1, i32 %in2) |
| ret i32 %tmp11 |
| } |
| |
| declare fastcc i8* @alias_callee() |
| |
| define fastcc noalias i8* @noalias_caller() nounwind { |
| ; CHECK-LABEL: noalias_caller: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: jmp alias_callee@PLT # TAILCALL |
| %p = tail call fastcc i8* @alias_callee() |
| ret i8* %p |
| } |
| |
| declare fastcc noalias i8* @noalias_callee() |
| |
| define dso_local fastcc i8* @alias_caller() nounwind { |
| ; CHECK-LABEL: alias_caller: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: jmp noalias_callee@PLT # TAILCALL |
| %p = tail call fastcc noalias i8* @noalias_callee() |
| ret i8* %p |
| } |
| |
| declare fastcc i32 @i32_callee() |
| |
| define dso_local fastcc i32 @ret_undef() nounwind { |
| ; CHECK-LABEL: ret_undef: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: jmp i32_callee@PLT # TAILCALL |
| %p = tail call fastcc i32 @i32_callee() |
| ret i32 undef |
| } |
| |
| declare fastcc void @does_not_return() |
| |
| define dso_local fastcc i32 @noret() nounwind { |
| ; CHECK-LABEL: noret: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: jmp does_not_return@PLT # TAILCALL |
| tail call fastcc void @does_not_return() |
| unreachable |
| } |
| |
| define dso_local fastcc void @void_test(i32, i32, i32, i32) { |
| ; CHECK-LABEL: void_test: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushl %esi |
| ; CHECK-NEXT: .cfi_def_cfa_offset 8 |
| ; CHECK-NEXT: subl $8, %esp |
| ; CHECK-NEXT: .cfi_def_cfa_offset 16 |
| ; CHECK-NEXT: .cfi_offset %esi, -8 |
| ; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax |
| ; CHECK-NEXT: movl {{[0-9]+}}(%esp), %esi |
| ; CHECK-NEXT: movl %esi, {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: movl %eax, {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: addl $8, %esp |
| ; CHECK-NEXT: .cfi_def_cfa_offset 8 |
| ; CHECK-NEXT: popl %esi |
| ; CHECK-NEXT: .cfi_def_cfa_offset 4 |
| ; CHECK-NEXT: jmp void_test # TAILCALL |
| entry: |
| tail call fastcc void @void_test( i32 %0, i32 %1, i32 %2, i32 %3) |
| ret void |
| } |
| |
| define dso_local fastcc i1 @i1test(i32, i32, i32, i32) { |
| ; CHECK-LABEL: i1test: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushl %esi |
| ; CHECK-NEXT: .cfi_def_cfa_offset 8 |
| ; CHECK-NEXT: subl $8, %esp |
| ; CHECK-NEXT: .cfi_def_cfa_offset 16 |
| ; CHECK-NEXT: .cfi_offset %esi, -8 |
| ; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax |
| ; CHECK-NEXT: movl {{[0-9]+}}(%esp), %esi |
| ; CHECK-NEXT: movl %esi, {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: movl %eax, {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: addl $8, %esp |
| ; CHECK-NEXT: .cfi_def_cfa_offset 8 |
| ; CHECK-NEXT: popl %esi |
| ; CHECK-NEXT: .cfi_def_cfa_offset 4 |
| ; CHECK-NEXT: jmp i1test # TAILCALL |
| entry: |
| %4 = tail call fastcc i1 @i1test( i32 %0, i32 %1, i32 %2, i32 %3) |
| ret i1 %4 |
| } |