File: struct-copy.c

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llvm-toolchain-19 1%3A19.1.7-3
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// 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 nocapture writeonly, ptr noalias nocapture 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));
}