| Message ID | 20170425100142.GV1809@tucnak |
|---|---|
| State | New |
| Headers | show |
On 25/04/17 11:01, Jakub Jelinek wrote: > Hi! > > Similarly to the previous patch, just hopefully triggers less often, > because 128-bit alignment is more rare. > > Ok for trunk/7.1 if it passes testing? > > 2017-04-25 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com> > Jakub Jelinek <jakub@redhat.com> > > PR target/77728 > * config/aarch64/aarch64.c (struct aarch64_fn_arg_alignment): New > type. > (aarch64_function_arg_alignment): Return aarch64_fn_arg_alignment > struct. Ignore DECL_ALIGN of decls other than FIELD_DECL for > the alignment computation, but return their maximum in warn_alignment. > (aarch64_layout_arg): Adjust aarch64_function_arg_alignment caller. > Emit a -Wpsabi note if warn_alignment is 16 bytes, but alignment > is smaller. > (aarch64_function_arg_boundary): Likewise. Simplify using MIN/MAX. > (aarch64_gimplify_va_arg_expr): Adjust aarch64_function_arg_alignment > caller. > testsuite/ > * g++.dg/abi/pr77728-2.C: New test. > > --- gcc/config/aarch64/aarch64.c.jj 2017-04-24 19:28:02.518970890 +0200 > +++ gcc/config/aarch64/aarch64.c 2017-04-25 11:07:55.169532408 +0200 > @@ -2256,33 +2256,58 @@ aarch64_vfp_is_call_candidate (cumulativ > NULL); > } > > -/* Given MODE and TYPE of a function argument, return the alignment in > +struct aarch64_fn_arg_alignment > +{ > + /* Alignment for FIELD_DECLs in function arguments. */ > + unsigned int alignment; > + /* Alignment for decls other than FIELD_DECLs in function arguments. */ > + unsigned int warn_alignment; > +}; > + > +/* Given MODE and TYPE of a function argument, return a pair of alignments in > bits. The idea is to suppress any stronger alignment requested by > the user and opt for the natural alignment (specified in AAPCS64 \S 4.1). > This is a helper function for local use only. */ > > -static unsigned int > +static struct aarch64_fn_arg_alignment > aarch64_function_arg_alignment (machine_mode mode, const_tree type) > { > + struct aarch64_fn_arg_alignment aa; > + aa.alignment = 0; > + aa.warn_alignment = 0; > + > if (!type) > - return GET_MODE_ALIGNMENT (mode); > + { > + aa.alignment = GET_MODE_ALIGNMENT (mode); > + return aa; > + } > + > if (integer_zerop (TYPE_SIZE (type))) > - return 0; > + return aa; > > gcc_assert (TYPE_MODE (type) == mode); > > if (!AGGREGATE_TYPE_P (type)) > - return TYPE_ALIGN (TYPE_MAIN_VARIANT (type)); > + { > + aa.alignment = TYPE_ALIGN (TYPE_MAIN_VARIANT (type)); > + return aa; > + } > > if (TREE_CODE (type) == ARRAY_TYPE) > - return TYPE_ALIGN (TREE_TYPE (type)); > - > - unsigned int alignment = 0; > + { > + aa.alignment = TYPE_ALIGN (TREE_TYPE (type)); > + return aa; > + } > > for (tree field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field)) > - alignment = std::max (alignment, DECL_ALIGN (field)); > + { > + if (TREE_CODE (field) == FIELD_DECL) > + aa.alignment = std::max (aa.alignment, DECL_ALIGN (field)); > + else > + aa.warn_alignment = std::max (aa.warn_alignment, DECL_ALIGN (field)); > + } > > - return alignment; > + return aa; > } > > /* Layout a function argument according to the AAPCS64 rules. The rule > @@ -2369,24 +2394,35 @@ aarch64_layout_arg (cumulative_args_t pc > entirely general registers. */ > if (allocate_ncrn && (ncrn + nregs <= NUM_ARG_REGS)) > { > - unsigned int alignment = aarch64_function_arg_alignment (mode, type); > > gcc_assert (nregs == 0 || nregs == 1 || nregs == 2); > > /* C.8 if the argument has an alignment of 16 then the NGRN is > rounded up to the next even number. */ > - if (nregs == 2 && alignment == 16 * BITS_PER_UNIT && ncrn % 2) > + if (nregs == 2 && ncrn % 2) > { > - ++ncrn; > - gcc_assert (ncrn + nregs <= NUM_ARG_REGS); > + struct aarch64_fn_arg_alignment aa > + = aarch64_function_arg_alignment (mode, type); > + > + if (aa.warn_alignment == 16 * BITS_PER_UNIT I was caught out (again) when reviewing this as to why the test was for exactly 16 bytes and not >= 16. I'd forgotten that anything with higher alignment would have a size larger than 16 and thus be passed by reference to a copy. Could you please add a comment to that effect as it's not obvious at this point. OK with that change if testing passes. > + && aa.alignment < aa.warn_alignment > + && warn_psabi > + && currently_expanding_gimple_stmt) > + inform (input_location, > + "parameter passing for argument of type %qT " > + "changed in GCC 7.1", type); > + else if (aa.alignment == 16 * BITS_PER_UNIT) > + { > + ++ncrn; > + gcc_assert (ncrn + nregs <= NUM_ARG_REGS); > + } > } > + > /* NREGS can be 0 when e.g. an empty structure is to be passed. > A reg is still generated for it, but the caller should be smart > enough not to use it. */ > if (nregs == 0 || nregs == 1 || GET_MODE_CLASS (mode) == MODE_INT) > - { > - pcum->aapcs_reg = gen_rtx_REG (mode, R0_REGNUM + ncrn); > - } > + pcum->aapcs_reg = gen_rtx_REG (mode, R0_REGNUM + ncrn); > else > { > rtx par; > @@ -2414,7 +2450,10 @@ aarch64_layout_arg (cumulative_args_t pc > this argument and align the total size if necessary. */ > on_stack: > pcum->aapcs_stack_words = size / UNITS_PER_WORD; > - if (aarch64_function_arg_alignment (mode, type) == 16 * BITS_PER_UNIT) > + struct aarch64_fn_arg_alignment aa > + = aarch64_function_arg_alignment (mode, type); > + > + if (aa.alignment == 16 * BITS_PER_UNIT) > pcum->aapcs_stack_size = ROUND_UP (pcum->aapcs_stack_size, > 16 / UNITS_PER_WORD); > return; > @@ -2505,13 +2544,17 @@ aarch64_function_arg_regno_p (unsigned r > static unsigned int > aarch64_function_arg_boundary (machine_mode mode, const_tree type) > { > - unsigned int alignment = aarch64_function_arg_alignment (mode, type); > + struct aarch64_fn_arg_alignment aa > + = aarch64_function_arg_alignment (mode, type); > + aa.alignment = MIN (MAX (aa.alignment, PARM_BOUNDARY), STACK_BOUNDARY); > + aa.warn_alignment > + = MIN (MAX (aa.warn_alignment, PARM_BOUNDARY), STACK_BOUNDARY); > + > + if (warn_psabi && aa.warn_alignment > aa.alignment) > + inform (input_location, "parameter passing for argument of type %qT " > + "changed in GCC 7.1", type); > > - if (alignment < PARM_BOUNDARY) > - alignment = PARM_BOUNDARY; > - if (alignment > STACK_BOUNDARY) > - alignment = STACK_BOUNDARY; > - return alignment; > + return aa.alignment; > } > > /* For use by FUNCTION_ARG_PADDING (MODE, TYPE). > @@ -10211,7 +10254,9 @@ aarch64_gimplify_va_arg_expr (tree valis > stack = build3 (COMPONENT_REF, TREE_TYPE (f_stack), unshare_expr (valist), > f_stack, NULL_TREE); > size = int_size_in_bytes (type); > - align = aarch64_function_arg_alignment (mode, type) / BITS_PER_UNIT; > + struct aarch64_fn_arg_alignment aa > + = aarch64_function_arg_alignment (mode, type); > + align = aa.alignment / BITS_PER_UNIT; > > dw_align = false; > adjust = 0; > --- gcc/testsuite/g++.dg/abi/pr77728-2.C.jj 2017-04-25 10:54:08.396372117 +0200 > +++ gcc/testsuite/g++.dg/abi/pr77728-2.C 2017-04-25 10:52:37.000000000 +0200 > @@ -0,0 +1,171 @@ > +// { dg-do compile { target { { aarch64-*-* } && c++11 } } } > +// { dg-options "-Wpsabi" } > + > +#include <stdarg.h> > + > +template <int N> > +struct alignas (16) A { char p[16]; }; > + > +A<0> v; > + > +template <int N> > +struct B > +{ > + typedef A<N> T; > + int i, j, k, l; > +}; > + > +struct C : public B<0> {}; > +struct D {}; > +struct E : public D, C {}; > +struct F : public B<1> {}; > +struct G : public F { static int y alignas (16); }; > +struct H : public G {}; > +struct I : public D { int z alignas (16); }; > +struct J : public D { static int z alignas (16); int i, j, k, l; }; > + > +template <int N> > +struct K : public D { typedef A<N> T; int i, j; }; > + > +struct L { static int h alignas (16); int i, j, k, l; }; > + > +int > +fn1 (int a, B<0> b) // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" } > +{ > + return a + b.i; > +} > + > +int > +fn2 (int a, B<1> b) > +{ > + return a + b.i; > +} > + > +int > +fn3 (int a, L b) // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" } > +{ > + return a + b.i; > +} > + > +int > +fn4 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, B<0> n, ...) > +// { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } > +{ > + va_list ap; > + va_start (ap, n); > + int x = va_arg (ap, int); > + va_end (ap); > + return x; > +} > + > +int > +fn5 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, B<1> n, ...) > +{ > + va_list ap; > + va_start (ap, n); > + int x = va_arg (ap, int); > + va_end (ap); > + return x; > +} > + > +int > +fn6 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, C n, ...) > +{ > + va_list ap; > + va_start (ap, n); > + int x = va_arg (ap, int); > + va_end (ap); > + return x; > +} > + > +int > +fn7 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, E n, ...) > +{ > + va_list ap; > + va_start (ap, n); > + int x = va_arg (ap, int); > + va_end (ap); > + return x; > +} > + > +int > +fn8 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, H n, ...) > +{ > + va_list ap; > + va_start (ap, n); > + int x = va_arg (ap, int); > + va_end (ap); > + return x; > +} > + > +int > +fn9 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, I n, ...) > +{ > + va_list ap; > + va_start (ap, n); > + int x = va_arg (ap, int); > + va_end (ap); > + return x; > +} > + > +int > +fn10 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, J n, ...) > +// { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } > +{ > + va_list ap; > + va_start (ap, n); > + int x = va_arg (ap, int); > + va_end (ap); > + return x; > +} > + > +int > +fn11 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, K<0> n, ...) > +// { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } > +{ > + va_list ap; > + va_start (ap, n); > + int x = va_arg (ap, int); > + va_end (ap); > + return x; > +} > + > +int > +fn12 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, K<2> n, ...) > +{ > + va_list ap; > + va_start (ap, n); > + int x = va_arg (ap, int); > + va_end (ap); > + return x; > +} > + > +void > +test () > +{ > + static B<0> b0; > + static B<1> b1; > + static L l; > + static C c; > + static E e; > + static H h; > + static I i; > + static J j; > + static K<0> k0; > + static K<2> k2; > + fn1 (1, b0); // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" } > + fn2 (1, b1); > + fn3 (1, l); // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" } > + fn4 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, b0, 1, 2, 3, 4); > + // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } > + fn5 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, b1, 1, 2, 3, 4); > + fn6 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, c, 1, 2, 3, 4); > + fn7 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, e, 1, 2, 3, 4); > + fn8 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, h, 1, 2, 3, 4); > + fn9 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, i, 1, 2, 3, 4); > + fn10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, j, 1, 2, 3, 4); > + // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } > + fn11 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, k0, 1, 2, 3, 4); > + // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } > + fn12 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, k2, 1, 2, 3, 4); > +} > > Jakub >
On Tue, Apr 25, 2017 at 01:29:06PM +0100, Richard Earnshaw (lists) wrote: > > /* C.8 if the argument has an alignment of 16 then the NGRN is > > rounded up to the next even number. */ > > - if (nregs == 2 && alignment == 16 * BITS_PER_UNIT && ncrn % 2) > > + if (nregs == 2 && ncrn % 2) > > { > > - ++ncrn; > > - gcc_assert (ncrn + nregs <= NUM_ARG_REGS); > > + struct aarch64_fn_arg_alignment aa > > + = aarch64_function_arg_alignment (mode, type); > > + > > + if (aa.warn_alignment == 16 * BITS_PER_UNIT > > I was caught out (again) when reviewing this as to why the test was for > exactly 16 bytes and not >= 16. I'd forgotten that anything with higher > alignment would have a size larger than 16 and thus be passed by I admit I didn't know why it has been written that way, I was just trying to write something that would do the same as before if ignoring the non-FIELD_DECL alignments and warn for the cases that changed ABI; as there was originally alignment == 16 * BITS_PER_UNIT, I kept using that. For structs/classes indeed I think alignment of any fields > 16 bytes implies struct size of > 16. The ARRAY_TYPE case is for some languages I'm not familiar with, in C/C++/Fortran that doesn't happen, so I can't guess what those languages can do. And otherwise it uses mode alignment or alignment of main variant of scalar/vector/complex types and I believe those should never be over-aligned. > reference to a copy. Could you please add a comment to that effect as > it's not obvious at this point. Ok. Jakub
--- gcc/config/aarch64/aarch64.c.jj 2017-04-24 19:28:02.518970890 +0200 +++ gcc/config/aarch64/aarch64.c 2017-04-25 11:07:55.169532408 +0200 @@ -2256,33 +2256,58 @@ aarch64_vfp_is_call_candidate (cumulativ NULL); } -/* Given MODE and TYPE of a function argument, return the alignment in +struct aarch64_fn_arg_alignment +{ + /* Alignment for FIELD_DECLs in function arguments. */ + unsigned int alignment; + /* Alignment for decls other than FIELD_DECLs in function arguments. */ + unsigned int warn_alignment; +}; + +/* Given MODE and TYPE of a function argument, return a pair of alignments in bits. The idea is to suppress any stronger alignment requested by the user and opt for the natural alignment (specified in AAPCS64 \S 4.1). This is a helper function for local use only. */ -static unsigned int +static struct aarch64_fn_arg_alignment aarch64_function_arg_alignment (machine_mode mode, const_tree type) { + struct aarch64_fn_arg_alignment aa; + aa.alignment = 0; + aa.warn_alignment = 0; + if (!type) - return GET_MODE_ALIGNMENT (mode); + { + aa.alignment = GET_MODE_ALIGNMENT (mode); + return aa; + } + if (integer_zerop (TYPE_SIZE (type))) - return 0; + return aa; gcc_assert (TYPE_MODE (type) == mode); if (!AGGREGATE_TYPE_P (type)) - return TYPE_ALIGN (TYPE_MAIN_VARIANT (type)); + { + aa.alignment = TYPE_ALIGN (TYPE_MAIN_VARIANT (type)); + return aa; + } if (TREE_CODE (type) == ARRAY_TYPE) - return TYPE_ALIGN (TREE_TYPE (type)); - - unsigned int alignment = 0; + { + aa.alignment = TYPE_ALIGN (TREE_TYPE (type)); + return aa; + } for (tree field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field)) - alignment = std::max (alignment, DECL_ALIGN (field)); + { + if (TREE_CODE (field) == FIELD_DECL) + aa.alignment = std::max (aa.alignment, DECL_ALIGN (field)); + else + aa.warn_alignment = std::max (aa.warn_alignment, DECL_ALIGN (field)); + } - return alignment; + return aa; } /* Layout a function argument according to the AAPCS64 rules. The rule @@ -2369,24 +2394,35 @@ aarch64_layout_arg (cumulative_args_t pc entirely general registers. */ if (allocate_ncrn && (ncrn + nregs <= NUM_ARG_REGS)) { - unsigned int alignment = aarch64_function_arg_alignment (mode, type); gcc_assert (nregs == 0 || nregs == 1 || nregs == 2); /* C.8 if the argument has an alignment of 16 then the NGRN is rounded up to the next even number. */ - if (nregs == 2 && alignment == 16 * BITS_PER_UNIT && ncrn % 2) + if (nregs == 2 && ncrn % 2) { - ++ncrn; - gcc_assert (ncrn + nregs <= NUM_ARG_REGS); + struct aarch64_fn_arg_alignment aa + = aarch64_function_arg_alignment (mode, type); + + if (aa.warn_alignment == 16 * BITS_PER_UNIT + && aa.alignment < aa.warn_alignment + && warn_psabi + && currently_expanding_gimple_stmt) + inform (input_location, + "parameter passing for argument of type %qT " + "changed in GCC 7.1", type); + else if (aa.alignment == 16 * BITS_PER_UNIT) + { + ++ncrn; + gcc_assert (ncrn + nregs <= NUM_ARG_REGS); + } } + /* NREGS can be 0 when e.g. an empty structure is to be passed. A reg is still generated for it, but the caller should be smart enough not to use it. */ if (nregs == 0 || nregs == 1 || GET_MODE_CLASS (mode) == MODE_INT) - { - pcum->aapcs_reg = gen_rtx_REG (mode, R0_REGNUM + ncrn); - } + pcum->aapcs_reg = gen_rtx_REG (mode, R0_REGNUM + ncrn); else { rtx par; @@ -2414,7 +2450,10 @@ aarch64_layout_arg (cumulative_args_t pc this argument and align the total size if necessary. */ on_stack: pcum->aapcs_stack_words = size / UNITS_PER_WORD; - if (aarch64_function_arg_alignment (mode, type) == 16 * BITS_PER_UNIT) + struct aarch64_fn_arg_alignment aa + = aarch64_function_arg_alignment (mode, type); + + if (aa.alignment == 16 * BITS_PER_UNIT) pcum->aapcs_stack_size = ROUND_UP (pcum->aapcs_stack_size, 16 / UNITS_PER_WORD); return; @@ -2505,13 +2544,17 @@ aarch64_function_arg_regno_p (unsigned r static unsigned int aarch64_function_arg_boundary (machine_mode mode, const_tree type) { - unsigned int alignment = aarch64_function_arg_alignment (mode, type); + struct aarch64_fn_arg_alignment aa + = aarch64_function_arg_alignment (mode, type); + aa.alignment = MIN (MAX (aa.alignment, PARM_BOUNDARY), STACK_BOUNDARY); + aa.warn_alignment + = MIN (MAX (aa.warn_alignment, PARM_BOUNDARY), STACK_BOUNDARY); + + if (warn_psabi && aa.warn_alignment > aa.alignment) + inform (input_location, "parameter passing for argument of type %qT " + "changed in GCC 7.1", type); - if (alignment < PARM_BOUNDARY) - alignment = PARM_BOUNDARY; - if (alignment > STACK_BOUNDARY) - alignment = STACK_BOUNDARY; - return alignment; + return aa.alignment; } /* For use by FUNCTION_ARG_PADDING (MODE, TYPE). @@ -10211,7 +10254,9 @@ aarch64_gimplify_va_arg_expr (tree valis stack = build3 (COMPONENT_REF, TREE_TYPE (f_stack), unshare_expr (valist), f_stack, NULL_TREE); size = int_size_in_bytes (type); - align = aarch64_function_arg_alignment (mode, type) / BITS_PER_UNIT; + struct aarch64_fn_arg_alignment aa + = aarch64_function_arg_alignment (mode, type); + align = aa.alignment / BITS_PER_UNIT; dw_align = false; adjust = 0; --- gcc/testsuite/g++.dg/abi/pr77728-2.C.jj 2017-04-25 10:54:08.396372117 +0200 +++ gcc/testsuite/g++.dg/abi/pr77728-2.C 2017-04-25 10:52:37.000000000 +0200 @@ -0,0 +1,171 @@ +// { dg-do compile { target { { aarch64-*-* } && c++11 } } } +// { dg-options "-Wpsabi" } + +#include <stdarg.h> + +template <int N> +struct alignas (16) A { char p[16]; }; + +A<0> v; + +template <int N> +struct B +{ + typedef A<N> T; + int i, j, k, l; +}; + +struct C : public B<0> {}; +struct D {}; +struct E : public D, C {}; +struct F : public B<1> {}; +struct G : public F { static int y alignas (16); }; +struct H : public G {}; +struct I : public D { int z alignas (16); }; +struct J : public D { static int z alignas (16); int i, j, k, l; }; + +template <int N> +struct K : public D { typedef A<N> T; int i, j; }; + +struct L { static int h alignas (16); int i, j, k, l; }; + +int +fn1 (int a, B<0> b) // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" } +{ + return a + b.i; +} + +int +fn2 (int a, B<1> b) +{ + return a + b.i; +} + +int +fn3 (int a, L b) // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" } +{ + return a + b.i; +} + +int +fn4 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, B<0> n, ...) +// { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } +{ + va_list ap; + va_start (ap, n); + int x = va_arg (ap, int); + va_end (ap); + return x; +} + +int +fn5 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, B<1> n, ...) +{ + va_list ap; + va_start (ap, n); + int x = va_arg (ap, int); + va_end (ap); + return x; +} + +int +fn6 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, C n, ...) +{ + va_list ap; + va_start (ap, n); + int x = va_arg (ap, int); + va_end (ap); + return x; +} + +int +fn7 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, E n, ...) +{ + va_list ap; + va_start (ap, n); + int x = va_arg (ap, int); + va_end (ap); + return x; +} + +int +fn8 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, H n, ...) +{ + va_list ap; + va_start (ap, n); + int x = va_arg (ap, int); + va_end (ap); + return x; +} + +int +fn9 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, I n, ...) +{ + va_list ap; + va_start (ap, n); + int x = va_arg (ap, int); + va_end (ap); + return x; +} + +int +fn10 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, J n, ...) +// { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } +{ + va_list ap; + va_start (ap, n); + int x = va_arg (ap, int); + va_end (ap); + return x; +} + +int +fn11 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, K<0> n, ...) +// { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } +{ + va_list ap; + va_start (ap, n); + int x = va_arg (ap, int); + va_end (ap); + return x; +} + +int +fn12 (int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, K<2> n, ...) +{ + va_list ap; + va_start (ap, n); + int x = va_arg (ap, int); + va_end (ap); + return x; +} + +void +test () +{ + static B<0> b0; + static B<1> b1; + static L l; + static C c; + static E e; + static H h; + static I i; + static J j; + static K<0> k0; + static K<2> k2; + fn1 (1, b0); // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" } + fn2 (1, b1); + fn3 (1, l); // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" } + fn4 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, b0, 1, 2, 3, 4); + // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } + fn5 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, b1, 1, 2, 3, 4); + fn6 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, c, 1, 2, 3, 4); + fn7 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, e, 1, 2, 3, 4); + fn8 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, h, 1, 2, 3, 4); + fn9 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, i, 1, 2, 3, 4); + fn10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, j, 1, 2, 3, 4); + // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } + fn11 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, k0, 1, 2, 3, 4); + // { dg-message "note: parameter passing for argument of type \[^\n\r]* changed in GCC 7\.1" "" { target *-*-* } .-1 } + fn12 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, k2, 1, 2, 3, 4); +}