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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -O1 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=O1
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -O0 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=O0
//
// Ensure that we place appropriate lifetime markers around indirectly returned
// temporaries, and that the lifetime.ends appear in a timely manner.
//
// -O1 is used so lifetime markers actually get emitted.
struct S {
int ns[40];
};
struct S foo(void);
// CHECK-LABEL: define dso_local void @bar
struct S bar() {
// O0-NOT: @llvm.lifetime.start
// O0-NOT: @llvm.lifetime.end
struct S r;
// O1: call void @llvm.lifetime.start.p0i8({{[^,]*}}, i8* nonnull %[[TMP1:[^)]+]])
// O1: call void @foo
r = foo();
// O1: call void @llvm.lifetime.end.p0i8({{[^,]*}}, i8* nonnull %[[TMP1]])
// O1: call void @llvm.lifetime.start.p0i8({{[^,]*}}, i8* nonnull %[[TMP2:[^)]+]])
// O1: call void @foo
r = foo();
// O1: call void @llvm.lifetime.end.p0i8({{[^,]*}}, i8* nonnull %[[TMP2]])
// O1: call void @llvm.lifetime.start.p0i8({{[^,]*}}, i8* nonnull %[[TMP3:[^)]+]])
// O1: call void @foo
r = foo();
// O1: call void @llvm.lifetime.end.p0i8({{[^,]*}}, i8* nonnull %[[TMP3]])
return r;
}
struct S foo_int(int);
// Be sure that we're placing the lifetime.end so that all paths go through it.
// Since this function turns out to be large-ish, optnone to hopefully keep it
// stable.
// CHECK-LABEL: define dso_local void @baz
__attribute__((optnone))
struct S baz(int i, volatile int *j) {
// O0-NOT: @llvm.lifetime.start
// O0-NOT: @llvm.lifetime.end
struct S r;
// O1: %[[TMP1_ALLOCA:[^ ]+]] = alloca %struct.S
// O1: %[[TMP2_ALLOCA:[^ ]+]] = alloca %struct.S
// O1: br label %[[DO_BODY:.+]]
do {
// O1: [[DO_BODY]]:
// O1: %[[P:[^ ]+]] = bitcast %struct.S* %[[TMP1_ALLOCA]] to i8*
// O1: call void @llvm.lifetime.start.p0i8({{[^,]*}}, i8* %[[P]])
// O1: br i1 {{[^,]+}}, label %[[IF_THEN:[^,]+]], label %[[IF_END:[^,]+]]
//
// O1: [[IF_THEN]]:
// O1: %[[P:[^ ]+]] = bitcast %struct.S* %[[TMP1_ALLOCA]] to i8*
// O1: call void @llvm.lifetime.end.p0i8({{[^,]*}}, i8* %[[P]])
// O1: br label %[[DO_END:.*]]
//
// O1: [[IF_END]]:
// O1: call void @foo_int(%struct.S* sret %[[TMP1_ALLOCA]],
// O1: call void @llvm.memcpy
// O1: %[[P:[^ ]+]] = bitcast %struct.S* %[[TMP1_ALLOCA]] to i8*
// O1: call void @llvm.lifetime.end.p0i8({{[^,]*}}, i8* %[[P]])
// O1: %[[P:[^ ]+]] = bitcast %struct.S* %[[TMP2_ALLOCA]] to i8*
// O1: call void @llvm.lifetime.start.p0i8({{[^,]*}}, i8* %[[P]])
// O1: call void @foo_int(%struct.S* sret %[[TMP2_ALLOCA]],
// O1: call void @llvm.memcpy
// O1: %[[P:[^ ]+]] = bitcast %struct.S* %[[TMP2_ALLOCA]] to i8*
// O1: call void @llvm.lifetime.end.p0i8({{[^,]*}}, i8* %[[P]])
// O1: br label %[[DO_COND:.*]]
//
// O1: [[DO_COND]]:
// O1: br label %[[DO_BODY]]
r = foo_int(({
if (*j)
break;
i++;
}));
r = foo_int(i++);
} while (1);
// O1: [[DO_END]]:
// O1-NEXT: ret void
return r;
}
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