[gcc(refs/users/meissner/heads/work110)] Revert patches

[Michael Meissner <meissner@gcc.gnu.org>]

https://gcc.gnu.org/g:fdd01d8e7fdab47a33789db15bf2507fda86b13e

commit fdd01d8e7fdab47a33789db15bf2507fda86b13e
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Thu Mar 9 03:02:37 2023 -0500

    Revert patches

Diff:
---
 gcc/config/rs6000/rs6000.cc                 | 111 ++++++++++++----------------
 gcc/testsuite/gcc.target/powerpc/divic3-1.c |  21 ------
 gcc/testsuite/gcc.target/powerpc/divic3-2.c |  25 -------
 gcc/testsuite/gcc.target/powerpc/mulic3-1.c |  21 ------
 gcc/testsuite/gcc.target/powerpc/mulic3-2.c |  25 -------
 5 files changed, 47 insertions(+), 156 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index b1b35b4bb77..8e0b0d022db 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -11154,6 +11154,26 @@ init_float128_ibm (machine_mode mode)
     }
 }
 
+/* Create a decl for either complex long double multiply or complex long double
+   divide when long double is IEEE 128-bit floating point.  We can't use
+   __multc3 and __divtc3 because the original long double using IBM extended
+   double used those names.  The complex multiply/divide functions are encoded
+   as builtin functions with a complex result and 4 scalar inputs.  */
+
+static void
+create_complex_muldiv (const char *name, built_in_function fncode, tree fntype)
+{
+  tree fndecl = add_builtin_function (name, fntype, fncode, BUILT_IN_NORMAL,
+				      name, NULL_TREE);
+
+  set_builtin_decl (fncode, fndecl, true);
+
+  if (TARGET_DEBUG_BUILTIN)
+    fprintf (stderr, "create complex %s, fncode: %d\n", name, (int) fncode);
+
+  return;
+}
+
 /* Set up IEEE 128-bit floating point routines.  Use different names if the
    arguments can be passed in a vector register.  The historical PowerPC
    implementation of IEEE 128-bit floating point used _q_<op> for the names, so
@@ -11165,6 +11185,32 @@ init_float128_ieee (machine_mode mode)
 {
   if (FLOAT128_VECTOR_P (mode))
     {
+      static bool complex_muldiv_init_p = false;
+
+      /* Set up to call __mulkc3 and __divkc3 under -mabi=ieeelongdouble.  If
+	 we have clone or target attributes, this will be called a second
+	 time.  We want to create the built-in function only once.  */
+     if (mode == TFmode && TARGET_IEEEQUAD && !complex_muldiv_init_p)
+       {
+	 complex_muldiv_init_p = true;
+	 built_in_function fncode_mul =
+	   (built_in_function) (BUILT_IN_COMPLEX_MUL_MIN + TCmode
+				- MIN_MODE_COMPLEX_FLOAT);
+	 built_in_function fncode_div =
+	   (built_in_function) (BUILT_IN_COMPLEX_DIV_MIN + TCmode
+				- MIN_MODE_COMPLEX_FLOAT);
+
+	 tree fntype = build_function_type_list (complex_long_double_type_node,
+						 long_double_type_node,
+						 long_double_type_node,
+						 long_double_type_node,
+						 long_double_type_node,
+						 NULL_TREE);
+
+	 create_complex_muldiv ("__mulkc3", fncode_mul, fntype);
+	 create_complex_muldiv ("__divkc3", fncode_div, fntype);
+       }
+
       set_optab_libfunc (add_optab, mode, "__addkf3");
       set_optab_libfunc (sub_optab, mode, "__subkf3");
       set_optab_libfunc (neg_optab, mode, "__negkf2");
@@ -28182,27 +28228,6 @@ rs6000_starting_frame_offset (void)
   return RS6000_STARTING_FRAME_OFFSET;
 }
 \f
-/* Internal function to return the built-in function id for the complex
-   multiply operation for a given mode.  */
-
-static inline built_in_function
-complex_multiply_builtin_code (machine_mode mode)
-{
-  gcc_assert (IN_RANGE (mode, MIN_MODE_COMPLEX_FLOAT, MAX_MODE_COMPLEX_FLOAT));
-  return (built_in_function) (BUILT_IN_COMPLEX_MUL_MIN + mode
-			      - MIN_MODE_COMPLEX_FLOAT);
-}
-
-/* Internal function to return the built-in function id for the complex divide
-   operation for a given mode.  */
-
-static inline built_in_function
-complex_divide_builtin_code (machine_mode mode)
-{
-  gcc_assert (IN_RANGE (mode, MIN_MODE_COMPLEX_FLOAT, MAX_MODE_COMPLEX_FLOAT));
-  return (built_in_function) (BUILT_IN_COMPLEX_DIV_MIN + mode
-			      - MIN_MODE_COMPLEX_FLOAT);
-}
 
 /* On 64-bit Linux and Freebsd systems, possibly switch the long double library
    function names from <foo>l to <foo>f128 if the default long double type is
@@ -28221,53 +28246,11 @@ complex_divide_builtin_code (machine_mode mode)
    only do this transformation if the __float128 type is enabled.  This
    prevents us from doing the transformation on older 32-bit ports that might
    have enabled using IEEE 128-bit floating point as the default long double
-   type.
-
-   We also use the TARGET_MANGLE_DECL_ASSEMBLER_NAME hook to change the
-   function names used for complex multiply and divide to the appropriate
-   names.  */
+   type.  */
 
 static tree
 rs6000_mangle_decl_assembler_name (tree decl, tree id)
 {
-  /* Handle complex multiply/divide.  For IEEE 128-bit, use __mulkc3 or
-     __divkc3 and for IBM 128-bit use __multc3 and __divtc3.  */
-  if (TARGET_FLOAT128_TYPE
-      && TREE_CODE (decl) == FUNCTION_DECL
-      && DECL_IS_UNDECLARED_BUILTIN (decl)
-      && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
-    {
-      built_in_function id = DECL_FUNCTION_CODE (decl);
-      const char *newname = NULL;
-
-      if (id == complex_multiply_builtin_code (KCmode))
-	newname = "__mulkc3";
-
-      else if (id == complex_multiply_builtin_code (ICmode))
-	newname = "__multc3";
-
-      else if (id == complex_multiply_builtin_code (TCmode))
-	newname = (TARGET_IEEEQUAD) ? "__mulkc3" : "__multc3";
-
-      else if (id == complex_divide_builtin_code (KCmode))
-	newname = "__divkc3";
-
-      else if (id == complex_divide_builtin_code (ICmode))
-	newname = "__divtc3";
-
-      else if (id == complex_divide_builtin_code (TCmode))
-	newname = (TARGET_IEEEQUAD) ? "__divkc3" : "__divtc3";
-
-      if (newname)
-	{
-	  if (TARGET_DEBUG_BUILTIN)
-	    fprintf (stderr, "Map complex mul/div => %s\n", newname);
-
-	  return get_identifier (newname);
-	}
-    }
-
-  /* Map long double built-in functions if long double is IEEE 128-bit.  */
   if (TARGET_FLOAT128_TYPE && TARGET_IEEEQUAD && TARGET_LONG_DOUBLE_128
       && TREE_CODE (decl) == FUNCTION_DECL
       && DECL_IS_UNDECLARED_BUILTIN (decl)
diff --git a/gcc/testsuite/gcc.target/powerpc/divic3-1.c b/gcc/testsuite/gcc.target/powerpc/divic3-1.c
deleted file mode 100644
index 8bf188617aa..00000000000
--- a/gcc/testsuite/gcc.target/powerpc/divic3-1.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* { dg-do compile } */
-/* { dg-require-effective-target ppc_float128_sw } */
-/* { dg-options "-O2 -mabi=ieeelongdouble" } */
-
-/* When GCC is configured with an older library that does not support IEEE
-   128-bit, it issues a warning if you change the long double type. We use
-   -Wno-psabi to silence this warning.  Since this is a code generation test,
-   it does not matter if the library has full IEEE 128-bit support.  */
-
-/* Check that complex divide generates the right call for __ibm128 when long
-   double is IEEE 128-bit floating point.  */
-
-typedef _Complex long double c_ibm128_t __attribute__((mode(__IC__)));
-
-void
-divide (c_ibm128_t *p, c_ibm128_t *q, c_ibm128_t *r)
-{
-  *p = *q / *r;
-}
-
-/* { dg-final { scan-assembler "bl __divtc3" } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/divic3-2.c b/gcc/testsuite/gcc.target/powerpc/divic3-2.c
deleted file mode 100644
index f0efb76ec7d..00000000000
--- a/gcc/testsuite/gcc.target/powerpc/divic3-2.c
+++ /dev/null
@@ -1,25 +0,0 @@
-/* { dg-do compile } */
-/* { dg-require-effective-target ppc_float128_sw } */
-/* { dg-require-effective-target longdouble128 } */
-/* { dg-options "-O2 -mabi=ibmlongdouble" } */
-
-/* When GCC is configured with an older library that does not support IEEE
-   128-bit, it issues a warning if you change the long double type. We use
-   -Wno-psabi to silence this warning.  Since this is a code generation test,
-   it does not matter if the library has full IEEE 128-bit support.
-
-   We also need to require that the default long double is 128-bits, otherwise
-   the TC/TF modes might not be available.  */
-
-/* Check that complex divide generates the right call for __ibm128 when long
-   double is IBM 128-bit floating point.  */
-
-typedef _Complex long double c_ibm128_t __attribute__((mode(__TC__)));
-
-void
-divide (c_ibm128_t *p, c_ibm128_t *q, c_ibm128_t *r)
-{
-  *p = *q / *r;
-}
-
-/* { dg-final { scan-assembler "bl __divtc3" } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/mulic3-1.c b/gcc/testsuite/gcc.target/powerpc/mulic3-1.c
deleted file mode 100644
index ac23c3e3437..00000000000
--- a/gcc/testsuite/gcc.target/powerpc/mulic3-1.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* { dg-do compile } */
-/* { dg-require-effective-target ppc_float128_sw } */
-/* { dg-options "-O2 -mabi=ieeelongdouble" } */
-
-/* When GCC is configured with an older library that does not support IEEE
-   128-bit, it issues a warning if you change the long double type. We use
-   -Wno-psabi to silence this warning.  Since this is a code generation test,
-   it does not matter if the library has full IEEE 128-bit support.  */
-
-/* Check that complex multiply generates the right call for __ibm128 when long
-   double is IEEE 128-bit floating point.  */
-
-typedef _Complex long double c_ibm128_t __attribute__((mode(__IC__)));
-
-void
-multiply (c_ibm128_t *p, c_ibm128_t *q, c_ibm128_t *r)
-{
-  *p = *q * *r;
-}
-
-/* { dg-final { scan-assembler "__multc3" } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/mulic3-2.c b/gcc/testsuite/gcc.target/powerpc/mulic3-2.c
deleted file mode 100644
index 75355160596..00000000000
--- a/gcc/testsuite/gcc.target/powerpc/mulic3-2.c
+++ /dev/null
@@ -1,25 +0,0 @@
-/* { dg-do compile } */
-/* { dg-require-effective-target ppc_float128_sw } */
-/* { dg-require-effective-target longdouble128 } */
-/* { dg-options "-O2 -mabi=ibmlongdouble" } */
-
-/* When GCC is configured with an older library that does not support IEEE
-   128-bit, it issues a warning if you change the long double type. We use
-   -Wno-psabi to silence this warning.  Since this is a code generation test,
-   it does not matter if the library has full IEEE 128-bit support.
-
-   We also need to require that the default long double is 128-bits, otherwise
-   the TC/TF modes might not be available.  */
-
-/* Check that complex multiply generates the right call for __ibm128 when long
-   double is IBM 128-bit floating point.  */
-
-typedef _Complex long double c_ibm128_t __attribute__((mode(__TC__)));
-
-void
-multiply (c_ibm128_t *p, c_ibm128_t *q, c_ibm128_t *r)
-{
-  *p = *q * *r;
-}
-
-/* { dg-final { scan-assembler "__multc3" } } */