| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s |
| |
| define void @tiny_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: tiny_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: andq $0, (%rdi) |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 4 %ptr, i8 0, i32 8, i1 false) |
| ret void |
| } |
| |
| define void @small_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: small_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq $32 |
| ; CHECK-NEXT: popq %rcx |
| ; CHECK-NEXT: xorl %eax, %eax |
| ; CHECK-NEXT: rep;stosl %eax, %es:(%rdi) |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 4 %ptr, i8 0, i32 128, i1 false) |
| ret void |
| } |
| |
| define void @medium_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: medium_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: movl $512, %edx # imm = 0x200 |
| ; CHECK-NEXT: xorl %esi, %esi |
| ; CHECK-NEXT: callq memset@PLT |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 4 %ptr, i8 0, i32 512, i1 false) |
| ret void |
| } |
| |
| define void @large_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: large_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: movl $4096, %edx # imm = 0x1000 |
| ; CHECK-NEXT: xorl %esi, %esi |
| ; CHECK-NEXT: callq memset@PLT |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 4 %ptr, i8 0, i32 4096, i1 false) |
| ret void |
| } |
| |
| define void @huge_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: huge_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: movl $8192, %edx # imm = 0x2000 |
| ; CHECK-NEXT: xorl %esi, %esi |
| ; CHECK-NEXT: callq memset@PLT |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 4 %ptr, i8 0, i32 8192, i1 false) |
| ret void |
| } |
| |
| define void @odd_length_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: odd_length_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: movl $255, %edx |
| ; CHECK-NEXT: xorl %esi, %esi |
| ; CHECK-NEXT: callq memset@PLT |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 4 %ptr, i8 0, i32 255, i1 false) |
| ret void |
| } |
| |
| define void @align_1_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: align_1_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: movl $256, %edx # imm = 0x100 |
| ; CHECK-NEXT: xorl %esi, %esi |
| ; CHECK-NEXT: callq memset@PLT |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 1 %ptr, i8 0, i32 256, i1 false) |
| ret void |
| } |
| |
| define void @align_2_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: align_2_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: movl $256, %edx # imm = 0x100 |
| ; CHECK-NEXT: xorl %esi, %esi |
| ; CHECK-NEXT: callq memset@PLT |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 2 %ptr, i8 0, i32 256, i1 false) |
| ret void |
| } |
| |
| define void @align_4_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: align_4_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: movl $256, %edx # imm = 0x100 |
| ; CHECK-NEXT: xorl %esi, %esi |
| ; CHECK-NEXT: callq memset@PLT |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 4 %ptr, i8 0, i32 256, i1 false) |
| ret void |
| } |
| |
| define void @align_8_memset_to_rep_stos(ptr %ptr) minsize nounwind { |
| ; CHECK-LABEL: align_8_memset_to_rep_stos: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: movl $256, %edx # imm = 0x100 |
| ; CHECK-NEXT: xorl %esi, %esi |
| ; CHECK-NEXT: callq memset@PLT |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: retq |
| entry: |
| call void @llvm.memset.p0.i32(ptr align 8 %ptr, i8 0, i32 256, i1 false) |
| ret void |
| } |
| |
| declare void @llvm.memset.p0.i32(ptr nocapture writeonly, i8, i32, i1) |