56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
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// RUN: %clang_cc1 -emit-llvm -triple x86_64-pc-linux-gnu %s -o - -std=c++11 | FileCheck %s
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volatile int g1;
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struct S {
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volatile int a;
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} g2;
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volatile int& refcall();
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// CHECK: define{{.*}} void @_Z2f1PViPV1S
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void f1(volatile int *x, volatile S* s) {
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// We should perform the load in these cases.
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// CHECK: load volatile i32, i32*
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(*x);
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// CHECK: load volatile i32, i32*
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__extension__ g1;
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// CHECK: load volatile i32, i32*
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s->a;
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// CHECK: load volatile i32, i32*
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g2.a;
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// CHECK: load volatile i32, i32*
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s->*(&S::a);
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// CHECK: load volatile i32, i32*
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// CHECK: load volatile i32, i32*
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x[0], 1 ? x[0] : *x;
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// CHECK: load volatile i32, i32*
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// CHECK: load volatile i32, i32*
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// CHECK: load volatile i32, i32*
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*x ?: *x;
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// CHECK: load volatile i32, i32*
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({ *x; });
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// CHECK-NOT: load volatile
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// CHECK: ret
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}
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// CHECK: define{{.*}} void @_Z2f2PVi
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// CHECK-NOT: load volatile
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// CHECK: ret
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void f2(volatile int *x) {
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// We shouldn't perform the load in these cases.
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refcall();
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1 ? refcall() : *x;
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}
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// CHECK: define{{.*}} void @_Z2f3v()
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// CHECK-NOT: load
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// CHECK-NOT: memcpy
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void f3(void) {
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volatile char a[10];
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a;
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}
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