File: struct-copy.c

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (17 lines) | stat: -rw-r--r-- 488 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
// RUN: %clang_cc1 -no-opaque-pointers -emit-llvm %s -o - | FileCheck %s
struct x { int a[100]; };


void foo(struct x *P, struct x *Q) {
// CHECK-LABEL: @foo(
// CHECK:    call void @llvm.memcpy.p0i8.p0i8
  *P = *Q;
}

// CHECK: declare void @llvm.memcpy.p0i8.p0i8{{.*}}(i8* noalias nocapture writeonly, i8* noalias nocapture readonly

void bar(struct x *P, struct x *Q) {
// CHECK-LABEL: @bar(
// CHECK:    call void @llvm.memcpy.p0i8.p0i8
  __builtin_memcpy(P, Q, sizeof(struct x));
}