mirror of
https://github.com/Gericom/teak-llvm.git
synced 2025-06-27 07:19:03 -04:00
01414bdc2c
This is to fix PR34347. EmitAtomicExpr now only uses alignment information from Type, instead of Decl, so when the declaration of an atomic variable is marked to have the alignment equal as its size, EmitAtomicExpr doesn't know about it and will generate libcall instead of atomic op. The patch uses EmitPointerWithAlignment to get the precise alignment information. Differential Revision: https://reviews.llvm.org/D37310 llvm-svn: 314145
31 lines
646 B
C++
31 lines
646 B
C++
// RUN: %clang_cc1 %s -std=c++11 -emit-llvm -o - -triple=x86_64-linux-gnu | FileCheck %s
|
|
|
|
struct AM {
|
|
int f1, f2;
|
|
};
|
|
alignas(8) AM m;
|
|
AM load1() {
|
|
AM am;
|
|
// m is declared to align to 8bytes, so generate load atomic instead
|
|
// of libcall.
|
|
// CHECK-LABEL: @_Z5load1v
|
|
// CHECK: load atomic {{.*}} monotonic
|
|
__atomic_load(&m, &am, 0);
|
|
return am;
|
|
}
|
|
|
|
struct BM {
|
|
int f1;
|
|
alignas(8) AM f2;
|
|
};
|
|
BM bm;
|
|
AM load2() {
|
|
AM am;
|
|
// BM::f2 is declared to align to 8bytes, so generate load atomic instead
|
|
// of libcall.
|
|
// CHECK-LABEL: @_Z5load2v
|
|
// CHECK: load atomic {{.*}} monotonic
|
|
__atomic_load(&bm.f2, &am, 0);
|
|
return am;
|
|
}
|