Pass an ABI to choose_hard_reg_mode

choose_hard_reg_mode previously took a boolean saying whether the
mode needed to be call-preserved.  This patch replaces it with an
optional ABI pointer instead, so that the function can use that
to test whether a value is call-saved.

default_dwarf_frame_reg_mode uses eh_edge_abi because that's the
ABI that matters for unwinding.  Targets need to override the hook
if they want something different.

2019-09-30  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* rtl.h (predefined_function_abi): Declare.
	(choose_hard_reg_mode): Take a pointer to a predefined_function_abi
	instead of a boolean call_save flag.
	* config/gcn/gcn.c (gcn_hard_regno_caller_save_mode): Update call
	accordingly.
	* config/i386/i386.h (HARD_REGNO_CALLER_SAVE_MODE): Likewise.
	* config/ia64/ia64.h (HARD_REGNO_CALLER_SAVE_MODE): Likewise.
	* config/mips/mips.c (mips_hard_regno_caller_save_mode): Likewise.
	* config/msp430/msp430.h (HARD_REGNO_CALLER_SAVE_MODE): Likewise.
	* config/rs6000/rs6000.h (HARD_REGNO_CALLER_SAVE_MODE): Likewise.
	* config/sh/sh.c (sh_hard_regno_caller_save_mode): Likewise.
	* reginfo.c (init_reg_modes_target): Likewise.
	(choose_hard_reg_mode): Take a pointer to a predefined_function_abi
	instead of a boolean call_save flag.
	* targhooks.c: Include function-abi.h.
	(default_dwarf_frame_reg_mode): Update call to choose_hard_reg_mode,
	using eh_edge_abi to choose the mode.

From-SVN: r276312

7 files changed, 7 insertions, 7 deletions

diff --git a/gcc/config/gcn/gcn.c b/gcc/config/gcn/gcn.c
index 50ae8e1..b5f09da 100644
--- a/gcc/config/gcn/gcn.c
+++ b/gcc/config/gcn/gcn.c
@@ -3017,7 +3017,7 @@ machine_mode
 gcn_hard_regno_caller_save_mode (unsigned int regno, unsigned int nregs,
 				 machine_mode regmode)
 {
-  machine_mode result = choose_hard_reg_mode (regno, nregs, false);
+  machine_mode result = choose_hard_reg_mode (regno, nregs, NULL);
 
   if (VECTOR_MODE_P (result) && !VECTOR_MODE_P (regmode))
     result = (nregs == 1 ? SImode : DImode);
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 885846e..9fe1f45 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -1258,7 +1258,7 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
 #define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE)			\
   (CC_REGNO_P (REGNO) ? VOIDmode					\
    : (MODE) == VOIDmode && (NREGS) != 1 ? VOIDmode			\
-   : (MODE) == VOIDmode ? choose_hard_reg_mode ((REGNO), (NREGS), false) \
+   : (MODE) == VOIDmode ? choose_hard_reg_mode ((REGNO), (NREGS), NULL)	\
    : (MODE) == HImode && !((GENERAL_REGNO_P (REGNO)			\
 			    && TARGET_PARTIAL_REG_STALL)		\
 			   || MASK_REGNO_P (REGNO)) ? SImode		\
diff --git a/gcc/config/ia64/ia64.h b/gcc/config/ia64/ia64.h
index d9d78fd..fc985b4 100644
--- a/gcc/config/ia64/ia64.h
+++ b/gcc/config/ia64/ia64.h
@@ -562,7 +562,7 @@ while (0)
 
 #define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \
   ((FR_REGNO_P (REGNO) && (NREGS) == 1) ? RFmode        \
-   : choose_hard_reg_mode ((REGNO), (NREGS), false))
+   : choose_hard_reg_mode ((REGNO), (NREGS), NULL))
 
 /* Handling Leaf Functions */
 
diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index 91dd94b..648d95f 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -22174,7 +22174,7 @@ mips_hard_regno_caller_save_mode (unsigned int regno,
   /* For performance, avoid saving/restoring upper parts of a register
      by returning MODE as save mode when the mode is known.  */
   if (mode == VOIDmode)
-    return choose_hard_reg_mode (regno, nregs, false);
+    return choose_hard_reg_mode (regno, nregs, NULL);
   else
     return mode;
 }
diff --git a/gcc/config/msp430/msp430.h b/gcc/config/msp430/msp430.h
index 36b715d..3449bd4 100644
--- a/gcc/config/msp430/msp430.h
+++ b/gcc/config/msp430/msp430.h
@@ -467,7 +467,7 @@ typedef struct
    when spilling hard registers when they may contain PSImode values.  */
 #define HARD_REGNO_CALLER_SAVE_MODE(REGNO,NREGS,MODE) \
   ((TARGET_LARGE && ((NREGS) <= 2)) ? PSImode \
-   : choose_hard_reg_mode ((REGNO), (NREGS), false))
+   : choose_hard_reg_mode ((REGNO), (NREGS), NULL))
 
 #define ACCUMULATE_OUTGOING_ARGS 1
 
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h
index 0156448..27373c5 100644
--- a/gcc/config/rs6000/rs6000.h
+++ b/gcc/config/rs6000/rs6000.h
@@ -1038,7 +1038,7 @@ enum data_align { align_abi, align_opt, align_both };
    ? DFmode								\
    : (MODE) == TDmode && FP_REGNO_P (REGNO)				\
    ? DImode								\
-   : choose_hard_reg_mode ((REGNO), (NREGS), false))
+   : choose_hard_reg_mode ((REGNO), (NREGS), NULL))
 
 #define VSX_VECTOR_MODE(MODE)		\
 	 ((MODE) == V4SFmode		\
diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c
index 34c4c8f..9917f2b 100644
--- a/gcc/config/sh/sh.c
+++ b/gcc/config/sh/sh.c
@@ -10637,7 +10637,7 @@ sh_hard_regno_caller_save_mode (unsigned int regno, unsigned int nregs,
 	      && ((regno - FIRST_FP_REG) & 1) == 0)))
     return mode;
 
-  return choose_hard_reg_mode (regno, nregs, false);
+  return choose_hard_reg_mode (regno, nregs, NULL);
 }
 
 /* Implement TARGET_CAN_CHANGE_MODE_CLASS.  */