Author: pfg
Date: Tue Nov 26 14:52:29 2013
New Revision: 258651
URL: http://svnweb.freebsd.org/changeset/base/258651
Log:
gcc: Altivec register adjustments from Apple.
Obtained from: gcc pre-4.3 (rev. 124763; GPLv2)
MFC after: 3 weeks
Modified:
head/contrib/gcc/ChangeLog.gcc43
head/contrib/gcc/config/rs6000/rs6000.c
Modified: head/contrib/gcc/ChangeLog.gcc43
==============================================================================
--- head/contrib/gcc/ChangeLog.gcc43 Tue Nov 26 14:50:39 2013
(r258650)
+++ head/contrib/gcc/ChangeLog.gcc43 Tue Nov 26 14:52:29 2013
(r258651)
@@ -31,6 +31,12 @@
regs_invalidated_by_call, rather than just checking the
membership of REGNO (REG).
+2007-05-16 Eric Christopher <echri...@apple.com> (r124763)
+
+ * config/rs6000/rs6000.c (rs6000_emit_prologue): Move altivec register
+ saving after stack push. Set sp_offset whenever we push.
+ (rs6000_emit_epilogue): Move altivec register restore before stack
push.
+
2007-05-03 Ian Lance Taylor <i...@google.com> (r124381)
* config/rs6000/rs6000.c (rs6000_override_options): Don't set
Modified: head/contrib/gcc/config/rs6000/rs6000.c
==============================================================================
--- head/contrib/gcc/config/rs6000/rs6000.c Tue Nov 26 14:50:39 2013
(r258650)
+++ head/contrib/gcc/config/rs6000/rs6000.c Tue Nov 26 14:52:29 2013
(r258651)
@@ -14466,77 +14466,6 @@ rs6000_emit_prologue (void)
sp_offset = info->total_size;
}
- /* Save AltiVec registers if needed. */
- if (!WORLD_SAVE_P (info) && TARGET_ALTIVEC_ABI && info->altivec_size != 0)
- {
- int i;
-
- /* There should be a non inline version of this, for when we
- are saving lots of vector registers. */
- for (i = info->first_altivec_reg_save; i <= LAST_ALTIVEC_REGNO; ++i)
- if (info->vrsave_mask & ALTIVEC_REG_BIT (i))
- {
- rtx areg, savereg, mem;
- int offset;
-
- offset = info->altivec_save_offset + sp_offset
- + 16 * (i - info->first_altivec_reg_save);
-
- savereg = gen_rtx_REG (V4SImode, i);
-
- areg = gen_rtx_REG (Pmode, 0);
- emit_move_insn (areg, GEN_INT (offset));
-
- /* AltiVec addressing mode is [reg+reg]. */
- mem = gen_frame_mem (V4SImode,
- gen_rtx_PLUS (Pmode, frame_reg_rtx, areg));
-
- insn = emit_move_insn (mem, savereg);
-
- rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
- areg, GEN_INT (offset));
- }
- }
-
- /* VRSAVE is a bit vector representing which AltiVec registers
- are used. The OS uses this to determine which vector
- registers to save on a context switch. We need to save
- VRSAVE on the stack frame, add whatever AltiVec registers we
- used in this function, and do the corresponding magic in the
- epilogue. */
-
- if (TARGET_ALTIVEC && TARGET_ALTIVEC_VRSAVE
- && info->vrsave_mask != 0)
- {
- rtx reg, mem, vrsave;
- int offset;
-
- /* Get VRSAVE onto a GPR. Note that ABI_V4 might be using r12
- as frame_reg_rtx and r11 as the static chain pointer for
- nested functions. */
- reg = gen_rtx_REG (SImode, 0);
- vrsave = gen_rtx_REG (SImode, VRSAVE_REGNO);
- if (TARGET_MACHO)
- emit_insn (gen_get_vrsave_internal (reg));
- else
- emit_insn (gen_rtx_SET (VOIDmode, reg, vrsave));
-
- if (!WORLD_SAVE_P (info))
- {
- /* Save VRSAVE. */
- offset = info->vrsave_save_offset + sp_offset;
- mem = gen_frame_mem (SImode,
- gen_rtx_PLUS (Pmode, frame_reg_rtx,
- GEN_INT (offset)));
- insn = emit_move_insn (mem, reg);
- }
-
- /* Include the registers in the mask. */
- emit_insn (gen_iorsi3 (reg, reg, GEN_INT ((int) info->vrsave_mask)));
-
- insn = emit_insn (generate_set_vrsave (reg, info, 0));
- }
-
/* If we use the link register, get it into r0. */
if (!WORLD_SAVE_P (info) && info->lr_save_p)
{
@@ -14774,7 +14703,10 @@ rs6000_emit_prologue (void)
for which it was done previously. */
if (!WORLD_SAVE_P (info) && info->push_p
&& !(DEFAULT_ABI == ABI_V4 || current_function_calls_eh_return))
- rs6000_emit_allocate_stack (info->total_size, FALSE);
+ {
+ rs6000_emit_allocate_stack (info->total_size, FALSE);
+ sp_offset = info->total_size;
+ }
/* Set frame pointer, if needed. */
if (frame_pointer_needed)
@@ -14784,6 +14716,78 @@ rs6000_emit_prologue (void)
RTX_FRAME_RELATED_P (insn) = 1;
}
+ /* Save AltiVec registers if needed. Save here because the red zone does
+ not include AltiVec registers. */
+ if (!WORLD_SAVE_P (info) && TARGET_ALTIVEC_ABI && info->altivec_size != 0)
+ {
+ int i;
+
+ /* There should be a non inline version of this, for when we
+ are saving lots of vector registers. */
+ for (i = info->first_altivec_reg_save; i <= LAST_ALTIVEC_REGNO; ++i)
+ if (info->vrsave_mask & ALTIVEC_REG_BIT (i))
+ {
+ rtx areg, savereg, mem;
+ int offset;
+
+ offset = info->altivec_save_offset + sp_offset
+ + 16 * (i - info->first_altivec_reg_save);
+
+ savereg = gen_rtx_REG (V4SImode, i);
+
+ areg = gen_rtx_REG (Pmode, 0);
+ emit_move_insn (areg, GEN_INT (offset));
+
+ /* AltiVec addressing mode is [reg+reg]. */
+ mem = gen_frame_mem (V4SImode,
+ gen_rtx_PLUS (Pmode, frame_reg_rtx, areg));
+
+ insn = emit_move_insn (mem, savereg);
+
+ rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
+ areg, GEN_INT (offset));
+ }
+ }
+
+ /* VRSAVE is a bit vector representing which AltiVec registers
+ are used. The OS uses this to determine which vector
+ registers to save on a context switch. We need to save
+ VRSAVE on the stack frame, add whatever AltiVec registers we
+ used in this function, and do the corresponding magic in the
+ epilogue. */
+
+ if (TARGET_ALTIVEC && TARGET_ALTIVEC_VRSAVE
+ && info->vrsave_mask != 0)
+ {
+ rtx reg, mem, vrsave;
+ int offset;
+
+ /* Get VRSAVE onto a GPR. Note that ABI_V4 might be using r12
+ as frame_reg_rtx and r11 as the static chain pointer for
+ nested functions. */
+ reg = gen_rtx_REG (SImode, 0);
+ vrsave = gen_rtx_REG (SImode, VRSAVE_REGNO);
+ if (TARGET_MACHO)
+ emit_insn (gen_get_vrsave_internal (reg));
+ else
+ emit_insn (gen_rtx_SET (VOIDmode, reg, vrsave));
+
+ if (!WORLD_SAVE_P (info))
+ {
+ /* Save VRSAVE. */
+ offset = info->vrsave_save_offset + sp_offset;
+ mem = gen_frame_mem (SImode,
+ gen_rtx_PLUS (Pmode, frame_reg_rtx,
+ GEN_INT (offset)));
+ insn = emit_move_insn (mem, reg);
+ }
+
+ /* Include the registers in the mask. */
+ emit_insn (gen_iorsi3 (reg, reg, GEN_INT ((int) info->vrsave_mask)));
+
+ insn = emit_insn (generate_set_vrsave (reg, info, 0));
+ }
+
/* If we are using RS6000_PIC_OFFSET_TABLE_REGNUM, we need to set it up. */
if ((TARGET_TOC && TARGET_MINIMAL_TOC && get_pool_size () != 0)
|| (DEFAULT_ABI == ABI_V4
@@ -15041,33 +15045,10 @@ rs6000_emit_epilogue (int sibcall)
return;
}
- /* If we have a frame pointer, a call to alloca, or a large stack
- frame, restore the old stack pointer using the backchain. Otherwise,
- we know what size to update it with. */
- if (use_backchain_to_restore_sp)
- {
- /* Under V.4, don't reset the stack pointer until after we're done
- loading the saved registers. */
- if (DEFAULT_ABI == ABI_V4)
- frame_reg_rtx = gen_rtx_REG (Pmode, 11);
-
- emit_move_insn (frame_reg_rtx,
- gen_rtx_MEM (Pmode, sp_reg_rtx));
- }
- else if (info->push_p)
- {
- if (DEFAULT_ABI == ABI_V4
- || current_function_calls_eh_return)
- sp_offset = info->total_size;
- else
- {
- emit_insn (TARGET_32BIT
- ? gen_addsi3 (sp_reg_rtx, sp_reg_rtx,
- GEN_INT (info->total_size))
- : gen_adddi3 (sp_reg_rtx, sp_reg_rtx,
- GEN_INT (info->total_size)));
- }
- }
+ /* Set sp_offset based on the stack push from the prologue. */
+ if ((DEFAULT_ABI == ABI_V4 || current_function_calls_eh_return)
+ && info->total_size < 32767)
+ sp_offset = info->total_size;
/* Restore AltiVec registers if needed. */
if (TARGET_ALTIVEC_ABI && info->altivec_size != 0)
@@ -15108,6 +15089,36 @@ rs6000_emit_epilogue (int sibcall)
emit_insn (generate_set_vrsave (reg, info, 1));
}
+ sp_offset = 0;
+
+ /* If we have a frame pointer, a call to alloca, or a large stack
+ frame, restore the old stack pointer using the backchain. Otherwise,
+ we know what size to update it with. */
+ if (use_backchain_to_restore_sp)
+ {
+ /* Under V.4, don't reset the stack pointer until after we're done
+ loading the saved registers. */
+ if (DEFAULT_ABI == ABI_V4)
+ frame_reg_rtx = gen_rtx_REG (Pmode, 11);
+
+ emit_move_insn (frame_reg_rtx,
+ gen_rtx_MEM (Pmode, sp_reg_rtx));
+ }
+ else if (info->push_p)
+ {
+ if (DEFAULT_ABI == ABI_V4
+ || current_function_calls_eh_return)
+ sp_offset = info->total_size;
+ else
+ {
+ emit_insn (TARGET_32BIT
+ ? gen_addsi3 (sp_reg_rtx, sp_reg_rtx,
+ GEN_INT (info->total_size))
+ : gen_adddi3 (sp_reg_rtx, sp_reg_rtx,
+ GEN_INT (info->total_size)));
+ }
+ }
+
/* Get the old lr if we saved it. */
if (info->lr_save_p)
{
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