llvm/test/Transforms/InstCombine/annotate-noalias.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine  -S < %s | FileCheck %s


declare i8* @memcpy(i8* nocapture, i8* nocapture, i64)
declare i8* @strncpy(i8* nocapture, i8* nocapture, i64)
declare i8* @strcpy(i8* nocapture, i8* nocapture)

define i8* @memcpy_const_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcpy_const_size_noalias(
; CHECK-NEXT:    call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 1 dereferenceable(16) [[D:%.*]], i8* noalias align 1 dereferenceable(16) [[S:%.*]], i64 16, i1 false)
; CHECK-NEXT:    ret i8* [[D]]
;
  %call = tail call i8* @memcpy(i8* %d, i8* %s, i64 16)
  ret i8* %call
}

define i8* @memcpy_const_zero_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcpy_const_zero_size_noalias(
; CHECK-NEXT:    ret i8* [[D:%.*]]
;
  %call = tail call i8* @memcpy(i8* %d, i8* %s, i64 0)
  ret i8* %call
}

define i8* @memcpy_nonconst_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s, i64 %n) {
; CHECK-LABEL: @memcpy_nonconst_size_noalias(
; CHECK-NEXT:    call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 1 [[D:%.*]], i8* noalias align 1 [[S:%.*]], i64 [[N:%.*]], i1 false)
; CHECK-NEXT:    ret i8* [[D]]
;
  %call = tail call i8* @memcpy(i8* %d, i8* %s, i64 %n)
  ret i8* %call
}

define i8* @strncpy_const_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @strncpy_const_size_noalias(
; CHECK-NEXT:    [[CALL:%.*]] = tail call i8* @strncpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]], i64 16)
; CHECK-NEXT:    ret i8* [[CALL]]
;
  %call = tail call i8* @strncpy(i8* %d, i8* %s, i64 16)
  ret i8* %call
}

define i8* @strncpy_const_zero_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @strncpy_const_zero_size_noalias(
; CHECK-NEXT:    [[CALL:%.*]] = tail call i8* @strncpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]], i64 0)
; CHECK-NEXT:    ret i8* [[CALL]]
;
  %call = tail call i8* @strncpy(i8* %d, i8* %s, i64 0)
  ret i8* %call
}

define i8* @strncpy_nonconst_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s, i64 %n) {
; CHECK-LABEL: @strncpy_nonconst_size_noalias(
; CHECK-NEXT:    [[CALL:%.*]] = tail call i8* @strncpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]], i64 [[N:%.*]])
; CHECK-NEXT:    ret i8* [[CALL]]
;
  %call = tail call i8* @strncpy(i8* %d, i8* %s, i64 %n)
  ret i8* %call
}

define i8* @strcpy_const_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @strcpy_const_size_noalias(
; CHECK-NEXT:    [[CALL:%.*]] = tail call i8* @strcpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]])
; CHECK-NEXT:    ret i8* [[CALL]]
;
  %call = tail call i8* @strcpy(i8* %d, i8* %s)
  ret i8* %call
}

define i8* @strcpy_nonconst_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @strcpy_nonconst_size_noalias(
; CHECK-NEXT:    [[CALL:%.*]] = tail call i8* @strcpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]])
; CHECK-NEXT:    ret i8* [[CALL]]
;
  %call = tail call i8* @strcpy(i8* %d, i8* %s)
  ret i8* %call
}