[gcc(refs/users/meissner/heads/work069)] Add option to assume built-in calls are in a shared library.

[gcc(refs/users/meissner/heads/work069)] Add option to assume built-in calls are in a shared library.

[Michael Meissner]

https://gcc.gnu.org/g:bf33d2db3bf4013cbbe01a087a8097d99a3d27dd

commit bf33d2db3bf4013cbbe01a087a8097d99a3d27dd
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Thu Sep 16 14:14:17 2021 -0400

    Add option to assume built-in calls are in a shared library.
    
    This patch adds an option (-mbuiltin-shlib) that says all calls to
    built-in functions are in a shared library.  This avoids having to call
    the PLT function which then loads up the function address and jumps to
    it.
    
    2021-09-16  Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            * config/rs6000/rs6000-call.c (init_cumulative_args): Set
            CALL_LONG for built-in functions if -mbuiltin-shlib.
            * config/rs6000/rs6000.opt (mbuiltin-shlib): New option.

Diff:
---
 gcc/config/rs6000/rs6000-call.c | 4 ++++
 gcc/config/rs6000/rs6000.opt    | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/gcc/config/rs6000/rs6000-call.c b/gcc/config/rs6000/rs6000-call.c
index e8625d17d18..c1a44f9137e 100644
--- a/gcc/config/rs6000/rs6000-call.c
+++ b/gcc/config/rs6000/rs6000-call.c
@@ -6661,6 +6661,10 @@ init_cumulative_args (CUMULATIVE_ARGS *cum, tree fntype,
 	  && lookup_attribute ("longcall", TYPE_ATTRIBUTES (fntype))
 	  && !lookup_attribute ("shortcall", TYPE_ATTRIBUTES (fntype))))
     cum->call_cookie |= CALL_LONG;
+  /* See if we want to assume all built-in functions are in a shared
+     library.  */
+  else if (TARGET_BUILTIN_SHLIB && fndecl && fndecl_built_in_p (fndecl))
+    cum->call_cookie |= CALL_LONG;
   else if (DEFAULT_ABI != ABI_DARWIN)
     {
       bool is_local = (fndecl
diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt
index 970988179e9..dadcefdb589 100644
--- a/gcc/config/rs6000/rs6000.opt
+++ b/gcc/config/rs6000/rs6000.opt
@@ -647,3 +647,7 @@ Generate (do not generate) XXSPLTIDP instructions.
 mlxvkq
 Target Undocumented Var(TARGET_LXVKQ) Init(1) Save
 Generate (do not generate) LXVKQ instructions.
+
+mbuiltin-shlib
+Target Undocumented Var(TARGET_BUILTIN_SHLIB) Init(0) Save
+Assume (do not assume) built-in functions are within a shared library.

[gcc(refs/users/meissner/heads/work069)] Add option to assume built-in calls are in a shared library.

[Michael Meissner]

https://gcc.gnu.org/g:b10afece39bb814248014956b3e8bd6b52feb522

commit b10afece39bb814248014956b3e8bd6b52feb522
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Fri Sep 17 01:29:08 2021 -0400

    Add option to assume built-in calls are in a shared library.
    
    This patch adds an option (-mbuiltin-shlib) that says all calls to
    built-in functions are in a shared library.  This avoids having to call
    the PLT function which then loads up the function address and jumps to
    it.
    
    2021-09-17  Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            * config/rs6000/rs6000-call.c (init_cumulative_args): Set
            CALL_LONG for built-in functions if -mbuiltin-shlib.
            * config/rs6000/rs6000.opt (mbuiltin-shlib): New option.

Diff:
---
 gcc/config/rs6000/rs6000-call.c | 4 ++++
 gcc/config/rs6000/rs6000.opt    | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/gcc/config/rs6000/rs6000-call.c b/gcc/config/rs6000/rs6000-call.c
index e8625d17d18..c1a44f9137e 100644
--- a/gcc/config/rs6000/rs6000-call.c
+++ b/gcc/config/rs6000/rs6000-call.c
@@ -6661,6 +6661,10 @@ init_cumulative_args (CUMULATIVE_ARGS *cum, tree fntype,
 	  && lookup_attribute ("longcall", TYPE_ATTRIBUTES (fntype))
 	  && !lookup_attribute ("shortcall", TYPE_ATTRIBUTES (fntype))))
     cum->call_cookie |= CALL_LONG;
+  /* See if we want to assume all built-in functions are in a shared
+     library.  */
+  else if (TARGET_BUILTIN_SHLIB && fndecl && fndecl_built_in_p (fndecl))
+    cum->call_cookie |= CALL_LONG;
   else if (DEFAULT_ABI != ABI_DARWIN)
     {
       bool is_local = (fndecl
diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt
index 817039d0321..3e6dc99febd 100644
--- a/gcc/config/rs6000/rs6000.opt
+++ b/gcc/config/rs6000/rs6000.opt
@@ -652,3 +652,7 @@ Generate (do not generate) XXSPLTIW instructions.
 mlxvkq
 Target Undocumented Var(TARGET_LXVKQ) Init(1) Save
 Generate (do not generate) LXVKQ instructions.
+
+mbuiltin-shlib
+Target Undocumented Var(TARGET_BUILTIN_SHLIB) Init(0) Save
+Assume (do not assume) built-in functions are within a shared library.