38 lines · c
1// RUN: %clang_cc1 %s -triple x86_64-pc-win32 -emit-llvm -o - | FileCheck %s2 3typedef __SIZE_TYPE__ size_t;4typedef __WCHAR_TYPE__ wchar_t;5 6int wmemcmp_test(const wchar_t *s1, const wchar_t *s2, size_t n) {7 // CHECK: [[S1:%.*]] = load8 // CHECK: [[S2:%.*]] = load9 // CHECK: [[N:%.*]] = load10 // CHECK: [[N0:%.*]] = icmp eq i64 [[N]], 011 // CHECK: br i1 [[N0]], label %[[EXIT:.*]], label %[[GT:.*]]12 13 // CHECK: [[GT]]:14 // CHECK: [[S1P:%.*]] = phi ptr [ [[S1]], %[[ENTRY:.*]] ], [ [[S1N:.*]], %[[NEXT:.*]] ]15 // CHECK: [[S2P:%.*]] = phi ptr [ [[S2]], %[[ENTRY]] ], [ [[S2N:.*]], %[[NEXT]] ]16 // CHECK: [[NP:%.*]] = phi i64 [ [[N]], %[[ENTRY]] ], [ [[NN:.*]], %[[NEXT]] ]17 // CHECK: [[S1L:%.*]] = load i16, ptr [[S1P]], align 218 // CHECK: [[S2L:%.*]] = load i16, ptr [[S2P]], align 219 // CHECK: [[CMPGT:%.*]] = icmp ugt i16 [[S1L]], [[S2L]]20 // CHECK: br i1 [[CMPGT]], label %[[EXIT]], label %[[LT:.*]]21 22 // CHECK: [[LT]]:23 // CHECK: [[CMPLT:%.*]] = icmp ult i16 [[S1L]], [[S2L]]24 // CHECK: br i1 [[CMPLT]], label %[[EXIT]], label %[[NEXT:.*]]25 26 // CHECK: [[NEXT]]:27 // CHECK: [[S1N]] = getelementptr inbounds i16, ptr [[S1P]], i32 128 // CHECK: [[S2N]] = getelementptr inbounds i16, ptr [[S2P]], i32 129 // CHECK: [[NN]] = sub i64 [[NP]], 130 // CHECK: [[NN0:%.*]] = icmp eq i64 [[NN]], 031 // CHECK: br i1 [[NN0]], label %[[EXIT]], label %[[GT]]32 //33 // CHECK: [[EXIT]]:34 // CHECK: [[RV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ 1, %[[GT]] ], [ -1, %[[LT]] ], [ 0, %[[NEXT]] ]35 // CHECK: ret i32 [[RV]]36 return __builtin_wmemcmp(s1, s2, n);37}38