On 6/2/24 13:16, Andi Kleen wrote:
Mostly adopted from the existing C musttail plugin tests.
gcc/testsuite/ChangeLog:
* c-c++-common/musttail1.c: New test.
* c-c++-common/musttail2.c: New test.
* c-c++-common/musttail3.c: New test.
* c-c++-common/musttail4.c: New test.
* c-c++-common/musttail7.c: New test.
* c-c++-common/musttail8.c: New test.
* g++.dg/musttail6.C: New test.
* g++.dg/musttail9.C: New test.
* g++.dg/musttail10.C: New test.
---
gcc/testsuite/c-c++-common/musttail1.c | 14 +++++++
gcc/testsuite/c-c++-common/musttail2.c | 33 +++++++++++++++
gcc/testsuite/c-c++-common/musttail3.c | 29 +++++++++++++
gcc/testsuite/c-c++-common/musttail4.c | 17 ++++++++
gcc/testsuite/c-c++-common/musttail5.c | 28 +++++++++++++
gcc/testsuite/c-c++-common/musttail7.c | 14 +++++++
gcc/testsuite/c-c++-common/musttail8.c | 17 ++++++++
gcc/testsuite/g++.dg/musttail10.C | 20 +++++++++
gcc/testsuite/g++.dg/musttail6.C | 58 ++++++++++++++++++++++++++
gcc/testsuite/g++.dg/musttail9.C | 10 +++++
10 files changed, 240 insertions(+)
create mode 100644 gcc/testsuite/c-c++-common/musttail1.c
create mode 100644 gcc/testsuite/c-c++-common/musttail2.c
create mode 100644 gcc/testsuite/c-c++-common/musttail3.c
create mode 100644 gcc/testsuite/c-c++-common/musttail4.c
create mode 100644 gcc/testsuite/c-c++-common/musttail5.c
create mode 100644 gcc/testsuite/c-c++-common/musttail7.c
create mode 100644 gcc/testsuite/c-c++-common/musttail8.c
create mode 100644 gcc/testsuite/g++.dg/musttail10.C
create mode 100644 gcc/testsuite/g++.dg/musttail6.C
create mode 100644 gcc/testsuite/g++.dg/musttail9.C
diff --git a/gcc/testsuite/c-c++-common/musttail1.c
b/gcc/testsuite/c-c++-common/musttail1.c
new file mode 100644
index 000000000000..74efcc2a0bc6
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/musttail1.c
@@ -0,0 +1,14 @@
+/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
+
+int __attribute__((noinline,noclone,noipa))
+callee (int i)
+{
+ return i * i;
+}
+
+int __attribute__((noinline,noclone,noipa))
+caller (int i)
+{
+ [[gnu::musttail]] return callee (i + 1);
+}
diff --git a/gcc/testsuite/c-c++-common/musttail2.c
b/gcc/testsuite/c-c++-common/musttail2.c
new file mode 100644
index 000000000000..86f2c3d77404
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/musttail2.c
@@ -0,0 +1,33 @@
+/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+
+struct box { char field[256]; int i; };
+
+int __attribute__((noinline,noclone,noipa))
+test_2_callee (int i, struct box b)
+{
+ if (b.field[0])
+ return 5;
+ return i * i;
+}
+
+int __attribute__((noinline,noclone,noipa))
+test_2_caller (int i)
+{
+ struct box b;
+ [[gnu::musttail]] return test_2_callee (i + 1, b); /* { dg-error "cannot
tail-call: " } */
+}
+
+extern void setjmp (void);
+void
+test_3 (void)
+{
+ [[gnu::musttail]] return setjmp (); /* { dg-error "cannot tail-call: " } */
+}
+
+extern float f7(void);
+
+int
+test_6 (void)
+{
+ [[gnu::musttail]] return f7(); /* { dg-error "cannot tail-call: " } */
+}
diff --git a/gcc/testsuite/c-c++-common/musttail3.c
b/gcc/testsuite/c-c++-common/musttail3.c
new file mode 100644
index 000000000000..ea9589c59ef2
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/musttail3.c
@@ -0,0 +1,29 @@
+/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+
+extern int foo2 (int x, ...);
+
+struct str
+{
+ int a, b;
+};
+
+struct str
+cstruct (int x)
+{
+ if (x < 10)
+ [[clang::musttail]] return cstruct (x + 1);
+ return ((struct str){ x, 0 });
+}
+
+int
+foo (int x)
+{
+ if (x < 10)
+ [[clang::musttail]] return foo2 (x, 29);
+ if (x < 100)
+ {
+ int k = foo (x + 1);
+ [[clang::musttail]] return k; /* { dg-error "cannot tail-call: " } */
+ }
+ return x;
+}
diff --git a/gcc/testsuite/c-c++-common/musttail4.c
b/gcc/testsuite/c-c++-common/musttail4.c
new file mode 100644
index 000000000000..23f4b5e1cd68
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/musttail4.c
@@ -0,0 +1,17 @@
+/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+
+struct box { char field[64]; int i; };
+
+struct box __attribute__((noinline,noclone,noipa))
+returns_struct (int i)
+{
+ struct box b;
+ b.i = i * i;
+ return b;
+}
+
+int __attribute__((noinline,noclone))
+test_1 (int i)
+{
+ [[gnu::musttail]] return returns_struct (i * 5).i; /* { dg-error "cannot
tail-call: " } */
+}
diff --git a/gcc/testsuite/c-c++-common/musttail5.c
b/gcc/testsuite/c-c++-common/musttail5.c
new file mode 100644
index 000000000000..234da0d3f2a9
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/musttail5.c
@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-options "-std=c23" { target c } } */
+/* { dg-options "-std=gnu++11" { target c++ } } */
+
+[[musttail]] int j; /* { dg-warning "attribute" } */
+__attribute__((musttail)) int k; /* { dg-warning "attribute" } */
+
+void foo(void)
+{
+ [[gnu::musttail]] j++; /* { dg-warning "attribute" } */
+ [[gnu::musttail]] if (k > 0) /* { dg-warning "attribute" } */
+ [[gnu::musttail]] k++; /* { dg-warning "attribute" } */
+}
+
+int foo2(int p)
+{
+ [[gnu::musttail(1)]] return foo2(p + 1); /* { dg-error "\(before numeric
constant|attribute\)" } */
+}
+
+int i;
+
+int foo3(void)
+{
+ [[musttail]] i++; /* { dg-warning "attribute" } */
+ [[musttail]] if (i > 10) /* { dg-warning "attribute" } */
+ [[musttail]] return foo2(i); /* { dg-warning "attribute" } */
+ return 0;
+}
diff --git a/gcc/testsuite/c-c++-common/musttail7.c
b/gcc/testsuite/c-c++-common/musttail7.c
new file mode 100644
index 000000000000..5e4eb1bfbacc
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/musttail7.c
@@ -0,0 +1,14 @@
+/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
+
+extern void f();
+
+void f2()
+{
+ [[gnu::musttail]] return f2();
+}
+
+void f3()
+{
+ [[gnu::musttail]] return f();
+}
diff --git a/gcc/testsuite/c-c++-common/musttail8.c
b/gcc/testsuite/c-c++-common/musttail8.c
new file mode 100644
index 000000000000..9fa10e0b54c4
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/musttail8.c
@@ -0,0 +1,17 @@
+/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+
+float f1(void);
+
+int f2(void)
+{
+ [[gnu::musttail]] return f1 (); /* { dg-error "changed after call" } */
+}
+
+
+int f3(int *);
+
+int f4(void)
+{
+ int x;
+ [[gnu::musttail]] return f3(&x); /* { dg-error "\(refers to locals|other
reasons\)" } */
+}
diff --git a/gcc/testsuite/g++.dg/musttail10.C
b/gcc/testsuite/g++.dg/musttail10.C
new file mode 100644
index 000000000000..6da7e021f826
--- /dev/null
+++ b/gcc/testsuite/g++.dg/musttail10.C
@@ -0,0 +1,20 @@
+/* { dg-do compile { target { tail_call } } } */
+/* { dg-options "-std=gnu++11" } */
+/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
+
+int f();
+
+double h() { [[gnu::musttail]] return f(); } /* { dg-error "cannot tail-call"
} */
+
+/* The error check cannot distinguish between the (valid) int and the invalid
+ double conversion case because the template context is lost when
tree-tailcall
+ finally runs. */
Maybe use identical g1 and g2 to distinguish?
+
+template <class T>
+T g() { [[gnu::musttail]] return f(); } /* { dg-error "cannot tail-call" } */
+
+int main()
+{
+ g<int>();
+ g<double>();
+}
diff --git a/gcc/testsuite/g++.dg/musttail6.C b/gcc/testsuite/g++.dg/musttail6.C
new file mode 100644
index 000000000000..e0e478e08d58
--- /dev/null
+++ b/gcc/testsuite/g++.dg/musttail6.C
@@ -0,0 +1,58 @@
+/* { dg-do compile { target { tail_call } } } */
+/* { dg-options "-std=gnu++11" } */
+/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
+
+class Foo {
+public:
+ int a, b;
+ Foo(int a, int b) : a(a), b(b) {}
+};
+
+Foo __attribute__((noinline,noclone,noipa))
+callee (int i)
+{
+ return Foo(i, i+1);
+}
+
+Foo __attribute__((noinline,noclone,noipa))
+caller (int i)
+{
+ [[gnu::musttail]] return callee (i + 1);
+}
+
+template<typename T>
+T __attribute__((noinline,noclone,noipa)) foo (T i)
+{
+ return i + 1;
+}
+
+int
+caller2 (int k)
+{
+ [[gnu::musttail]] return foo<int>(1);
+}
+
+template<typename T>
+T caller3 (T v)
+{
+ [[gnu::musttail]] return foo<T>(v);
+}
+
+int call3(int i)
+{
+ [[gnu::musttail]] return caller3<int>(i + 1);
+}
+
+struct Bar {
+ int a;
+ Bar(int a) : a(a) {}
+ Bar operator+(Bar o) { return Bar(a + o.a); }
+};
+
+#if __OPTIMIZE__ >= 1
+Bar
+caller4 (Bar k)
+{
+ [[gnu::musttail]] return caller3<Bar>(Bar(99));
+}
+#endif
diff --git a/gcc/testsuite/g++.dg/musttail9.C b/gcc/testsuite/g++.dg/musttail9.C
new file mode 100644
index 000000000000..8095bdf6fe62
--- /dev/null
+++ b/gcc/testsuite/g++.dg/musttail9.C
@@ -0,0 +1,10 @@
+/* { dg-do compile { target { tail_call } } } */
+/* { dg-options "-std=gnu++11 -Wno-deprecated" } */
+/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
+
+extern void foo() throw(const char *);
+
+void f() throw()
+{
+ [[gnu::musttail]] return foo(); /* { dg-error "call may throw exception that does
not propagate" } */
+}
Instead of -Wno-deprecated let's use C++11 exception-specifications; you
can leave out the exception specification on foo and change f's to
"noexcept".
Jason
