File: struct-copy.c

package info (click to toggle)
llvm-toolchain-21 1%3A21.1.0-1
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 2,235,796 kB
  • sloc: cpp: 7,617,614; ansic: 1,433,901; asm: 1,058,726; python: 252,096; f90: 94,671; objc: 70,753; lisp: 42,813; pascal: 18,401; sh: 10,032; ml: 5,111; perl: 4,720; awk: 3,523; makefile: 3,401; javascript: 2,272; xml: 892; fortran: 770
file content (17 lines) | stat: -rw-r--r-- 451 bytes parent folder | download | duplicates (4) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
// RUN: %clang_cc1 -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.p0.p0
  *P = *Q;
}

// CHECK: declare void @llvm.memcpy.p0.p0{{.*}}(ptr noalias writeonly captures(none), ptr noalias readonly

void bar(struct x *P, struct x *Q) {
// CHECK-LABEL: @bar(
// CHECK:    call void @llvm.memcpy.p0.p0
  __builtin_memcpy(P, Q, sizeof(struct x));
}