37 lines · c
1// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py2 3// RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - %s | opt -S -passes=verify | FileCheck %s4//5// Verifies that clang detects memcmp inline version and uses it instead of the builtin.6 7typedef unsigned long size_t;8 9// Clang requires these attributes for a function to be redefined.10#define AVAILABLE_EXTERNALLY extern inline __attribute__((always_inline)) __attribute__((gnu_inline))11 12const void *con_unify_unimap_p1;13 14AVAILABLE_EXTERNALLY15int memcmp(const void *p, const void *q, unsigned long size) {16 return __builtin_memcmp(p, q, size);17}18 19// CHECK-LABEL: @con_unify_unimap_q1(20// CHECK-NEXT: entry:21// CHECK-NEXT: [[P_ADDR_I:%.*]] = alloca ptr, align 822// CHECK-NEXT: [[Q_ADDR_I:%.*]] = alloca ptr, align 823// CHECK-NEXT: [[SIZE_ADDR_I:%.*]] = alloca i64, align 824// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr @con_unify_unimap_p1, align 825// CHECK-NEXT: store ptr [[TMP0]], ptr [[P_ADDR_I]], align 826// CHECK-NEXT: store ptr @con_unify_unimap_q1, ptr [[Q_ADDR_I]], align 827// CHECK-NEXT: store i64 4, ptr [[SIZE_ADDR_I]], align 828// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[P_ADDR_I]], align 829// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[Q_ADDR_I]], align 830// CHECK-NEXT: [[TMP3:%.*]] = load i64, ptr [[SIZE_ADDR_I]], align 831// CHECK-NEXT: [[CALL_I:%.*]] = call i32 @memcmp(ptr noundef [[TMP1]], ptr noundef [[TMP2]], i64 noundef [[TMP3]]) #[[ATTR3:[0-9]+]]32// CHECK-NEXT: ret i32 [[CALL_I]]33//34int con_unify_unimap_q1(void) {35 return memcmp(con_unify_unimap_p1, con_unify_unimap_q1, sizeof(int));36}37