From: Andi Kleen <a...@gcc.gnu.org>
This is a new attempt to fix PR116080. The previous try was reverted
because it just broke a bunch of tests, hiding the problem.
- musttail behaves differently than tailcall at -O0. Some of the test
run at -O0, so add separate effective target tests for musttail.
- New effective target tests need to use unique file names
to make dejagnu caching work
- Change the tests to use new targets
- Add a external_musttail test to check for target's ability
to do tail calls between translation units. This covers some powerpc
ABIs.
gcc/testsuite/ChangeLog:
PR testsuite/116080
* c-c++-common/musttail1.c: Use musttail target.
* c-c++-common/musttail12.c: Use struct_musttail target.
* c-c++-common/musttail2.c: Use musttail target.
* c-c++-common/musttail3.c: Likewise.
* c-c++-common/musttail4.c: Likewise.
* c-c++-common/musttail7.c: Likewise.
* c-c++-common/musttail8.c: Likewise.
* g++.dg/musttail10.C: Likewise. Replace powerpc checks with
external_musttail.
* g++.dg/musttail11.C: Use musttail target.
* g++.dg/musttail6.C: Use musttail target. Replace powerpc
checks with external_musttail.
* g++.dg/musttail9.C: Use musttail target.
* lib/target-supports.exp: Add musttail, struct_musttail,
external_musttail targets. Remove optimization for musttail.
Use unique file names for musttail.
---
gcc/testsuite/c-c++-common/musttail1.c | 2 +-
gcc/testsuite/c-c++-common/musttail12.c | 2 +-
gcc/testsuite/c-c++-common/musttail2.c | 2 +-
gcc/testsuite/c-c++-common/musttail3.c | 2 +-
gcc/testsuite/c-c++-common/musttail4.c | 2 +-
gcc/testsuite/c-c++-common/musttail7.c | 2 +-
gcc/testsuite/c-c++-common/musttail8.c | 2 +-
gcc/testsuite/g++.dg/musttail10.C | 4 ++--
gcc/testsuite/g++.dg/musttail11.C | 2 +-
gcc/testsuite/g++.dg/musttail6.C | 4 ++--
gcc/testsuite/g++.dg/musttail9.C | 2 +-
gcc/testsuite/lib/target-supports.exp | 30 ++++++++++++++++++++-----
12 files changed, 37 insertions(+), 19 deletions(-)
diff --git a/gcc/testsuite/c-c++-common/musttail1.c
b/gcc/testsuite/c-c++-common/musttail1.c
index 74efcc2a0bc6..51549672e02a 100644
--- a/gcc/testsuite/c-c++-common/musttail1.c
+++ b/gcc/testsuite/c-c++-common/musttail1.c
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+/* { dg-do compile { target { musttail && { c || c++11 } } } } */
/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
int __attribute__((noinline,noclone,noipa))
diff --git a/gcc/testsuite/c-c++-common/musttail12.c
b/gcc/testsuite/c-c++-common/musttail12.c
index 4140bcd00950..475afc5af3f3 100644
--- a/gcc/testsuite/c-c++-common/musttail12.c
+++ b/gcc/testsuite/c-c++-common/musttail12.c
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { struct_tail_call && { c || c++11 } } } } */
+/* { dg-do compile { target { struct_musttail && { c || c++11 } } } } */
/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
struct str
diff --git a/gcc/testsuite/c-c++-common/musttail2.c
b/gcc/testsuite/c-c++-common/musttail2.c
index 86f2c3d77404..1970c4edd670 100644
--- a/gcc/testsuite/c-c++-common/musttail2.c
+++ b/gcc/testsuite/c-c++-common/musttail2.c
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+/* { dg-do compile { target { musttail && { c || c++11 } } } } */
struct box { char field[256]; int i; };
diff --git a/gcc/testsuite/c-c++-common/musttail3.c
b/gcc/testsuite/c-c++-common/musttail3.c
index ea9589c59ef2..7499fd6460b4 100644
--- a/gcc/testsuite/c-c++-common/musttail3.c
+++ b/gcc/testsuite/c-c++-common/musttail3.c
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+/* { dg-do compile { target { struct_musttail && { c || c++11 } } } } */
extern int foo2 (int x, ...);
diff --git a/gcc/testsuite/c-c++-common/musttail4.c
b/gcc/testsuite/c-c++-common/musttail4.c
index 23f4b5e1cd68..bd6effa4b931 100644
--- a/gcc/testsuite/c-c++-common/musttail4.c
+++ b/gcc/testsuite/c-c++-common/musttail4.c
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+/* { dg-do compile { target { musttail && { c || c++11 } } } } */
struct box { char field[64]; int i; };
diff --git a/gcc/testsuite/c-c++-common/musttail7.c
b/gcc/testsuite/c-c++-common/musttail7.c
index c753a3fe9b2a..d17cb71256d7 100644
--- a/gcc/testsuite/c-c++-common/musttail7.c
+++ b/gcc/testsuite/c-c++-common/musttail7.c
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+/* { dg-do compile { target { musttail && { c || c++11 } } } } */
/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
void __attribute__((noipa)) f() {}
diff --git a/gcc/testsuite/c-c++-common/musttail8.c
b/gcc/testsuite/c-c++-common/musttail8.c
index 9fa10e0b54c4..50ca1ac0dd48 100644
--- a/gcc/testsuite/c-c++-common/musttail8.c
+++ b/gcc/testsuite/c-c++-common/musttail8.c
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { tail_call && { c || c++11 } } } } */
+/* { dg-do compile { target { musttail && { c || c++11 } } } } */
float f1(void);
diff --git a/gcc/testsuite/g++.dg/musttail10.C
b/gcc/testsuite/g++.dg/musttail10.C
index ff7fcc7d8755..49430b1263a5 100644
--- a/gcc/testsuite/g++.dg/musttail10.C
+++ b/gcc/testsuite/g++.dg/musttail10.C
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { tail_call } } } */
+/* { dg-do compile { target { musttail } } } */
/* { dg-options "-std=gnu++11" } */
/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
@@ -8,7 +8,7 @@ double g() { [[gnu::musttail]] return f<int>(); } /* { dg-error
"cannot tail-cal
template <class T>
__attribute__((noinline, noclone, noipa))
-T g1() { [[gnu::musttail]] return f<T>(); } /* { dg-error "target is not able"
"" { target powerpc*-*-* } } */
+T g1() { [[gnu::musttail]] return f<T>(); } /* { dg-error "target is not able"
"" { target { ! external_musttail } } } */
template <class T>
__attribute__((noinline, noclone, noipa))
diff --git a/gcc/testsuite/g++.dg/musttail11.C
b/gcc/testsuite/g++.dg/musttail11.C
index 1779e3287a93..dca87247d504 100644
--- a/gcc/testsuite/g++.dg/musttail11.C
+++ b/gcc/testsuite/g++.dg/musttail11.C
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { tail_call } } } */
+/* { dg-do compile { target { musttail } } } */
/* { dg-options "-std=gnu++11" } */
/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
diff --git a/gcc/testsuite/g++.dg/musttail6.C b/gcc/testsuite/g++.dg/musttail6.C
index 5c6f69407ddb..5dcf302139ae 100644
--- a/gcc/testsuite/g++.dg/musttail6.C
+++ b/gcc/testsuite/g++.dg/musttail6.C
@@ -1,6 +1,6 @@
-/* { dg-do compile { target { struct_tail_call } } } */
+/* { dg-do compile { target { struct_musttail } } } */
+/* { dg-require-effective-target external_musttail } */
/* A lot of architectures will not build this due to PR115606 and PR115607 */
-/* { dg-skip-if "powerpc does not support sibcall to templates" { powerpc*-*-*
} } */
/* { dg-options "-std=gnu++11" } */
/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
diff --git a/gcc/testsuite/g++.dg/musttail9.C b/gcc/testsuite/g++.dg/musttail9.C
index fb0262e751be..85937dcdcd31 100644
--- a/gcc/testsuite/g++.dg/musttail9.C
+++ b/gcc/testsuite/g++.dg/musttail9.C
@@ -1,4 +1,4 @@
-/* { dg-do compile { target { tail_call } } } */
+/* { dg-do compile { target { musttail } } } */
/* { dg-options "-std=gnu++11" } */
/* { dg-additional-options "-fdelayed-branch" { target sparc*-*-* } } */
diff --git a/gcc/testsuite/lib/target-supports.exp
b/gcc/testsuite/lib/target-supports.exp
index d368251ef9a4..10b2969f747a 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -12744,16 +12744,34 @@ proc check_effective_target_tail_call { } {
} {-O2 -fdump-rtl-expand-all}] ;# The "SIBCALL" note requires a detailed
dump.
}
-# Return 1 if the target can perform tail-call optimizations for structures
+# Return 1 if the target can perform musttail optimizations of the
+# most trivial type. This is separate from tail_call because musttail
+# is supported at -O0.
+proc check_effective_target_musttail { } {
+ return [check_no_messages_and_pattern musttail ",SIBCALL" rtl-expand {
+ __attribute__((__noipa__)) void foo (void) { }
+ __attribute__((__noipa__)) void bar (void) { [[gnu::musttail]] return
foo(); }
+ } {-fdump-rtl-expand-all}] ;# The "SIBCALL" note requires a detailed dump.
+}
+
+# Return 1 if the target can perform musttail for externals
+proc check_effective_target_external_musttail { } {
+ return [check_no_messages_and_pattern external_musttail ",SIBCALL"
rtl-expand {
+ extern __attribute__((__noipa__)) void foo (void);
+ __attribute__((__noipa__)) void bar (void) { [[gnu::musttail]] return
foo(); }
+ } {-fdump-rtl-expand-all}] ;# The "SIBCALL" note requires a detailed dump.
+}
+
+# Return 1 if the target can perform musttail optimizations for structures
# checking with C++ because the C++ compiler has less tail call ability
# due to PR115606 on some targets
-proc check_effective_target_struct_tail_call { } {
- return [check_no_messages_and_pattern tail_call ",SIBCALL" rtl-expand {
+proc check_effective_target_struct_musttail { } {
+ return [check_no_messages_and_pattern struct_musttail ",SIBCALL"
rtl-expand {
// C++
struct foo { int a, b; };
- __attribute__((__noipa__)) struct foo foo (void) { return {}; }
- __attribute__((__noipa__)) struct foo bar (void) { return foo(); }
- } {-O2 -fdump-rtl-expand-all}] ;# The "SIBCALL" note requires a detailed
dump.
+ extern __attribute__((__noipa__)) struct foo foo (void);
+ __attribute__((__noipa__)) struct foo bar (void) { [[gnu::musttail]]
return foo(); }
+ } {-fdump-rtl-expand-all}] ;# The "SIBCALL" note requires a detailed dump.
}
# Return 1 if the target's calling sequence or its ABI
--
2.45.2
