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s390.c (s390_emit_prologue): Simplify accesses to FPR slots in the save area.

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* config/s390/s390.c (s390_emit_prologue): Simplify accesses to
	FPR slots in the save area.
	(s390_emit_epilogue): Likewise.

From-SVN: r71799
This commit is contained in:
Ulrich Weigand 2003-09-25 21:38:43 +00:00 committed by Ulrich Weigand
parent 775ee48ed2
commit 7333171fe9
2 changed files with 24 additions and 44 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2003-09-25 Ulrich Weigand <uweigand@de.ibm.com>
* config/s390/s390.c (s390_emit_prologue): Simplify accesses to
FPR slots in the save area.
(s390_emit_epilogue): Likewise.
2003-09-25 Richard Sandiford <rsandifo@redhat.com>
* cgraph.h (cgraph_remove_edge): Declare.

62
gcc/config/s390/s390.c
View File

@ -5493,37 +5493,18 @@ s390_emit_prologue (void)
/* Save fprs for variable args. */
if (current_function_stdarg)
{
/* Save fpr 0 and 2. */
save_fpr (stack_pointer_rtx, STACK_POINTER_OFFSET - 32, 16);
save_fpr (stack_pointer_rtx, STACK_POINTER_OFFSET - 24, 17);
if (TARGET_64BIT)
{
/* Save fpr 4 and 6. */
save_fpr (stack_pointer_rtx, STACK_POINTER_OFFSET - 16, 18);
save_fpr (stack_pointer_rtx, STACK_POINTER_OFFSET - 8, 19);
}
}
for (i = 16; i < (TARGET_64BIT ? 20 : 18); i++)
save_fpr (stack_pointer_rtx, 16*UNITS_PER_WORD + 8*(i-16), i);
/* Save fprs 4 and 6 if used (31 bit ABI). */
if (!TARGET_64BIT)
{
/* Save fpr 4 and 6. */
if (regs_ever_live[18] && !global_regs[18])
for (i = 18; i < 20; i++)
if (regs_ever_live[i] && !global_regs[i])
{
insn = save_fpr (stack_pointer_rtx, STACK_POINTER_OFFSET - 16, 18);
insn = save_fpr (stack_pointer_rtx, 16*UNITS_PER_WORD + 8*(i-16), i);
RTX_FRAME_RELATED_P (insn) = 1;
}
if (regs_ever_live[19] && !global_regs[19])
{
insn = save_fpr (stack_pointer_rtx, STACK_POINTER_OFFSET - 8, 19);
RTX_FRAME_RELATED_P (insn) = 1;
}
}
/* Decrement stack pointer. */
@ -5650,6 +5631,7 @@ s390_emit_epilogue (void)
rtx frame_pointer, return_reg;
int area_bottom, area_top, offset = 0;
rtvec p;
int i;
if (TARGET_TPF)
{
@ -5705,20 +5687,14 @@ s390_emit_epilogue (void)
}
else
{
if (regs_ever_live[18] && !global_regs[18])
{
if (area_bottom > STACK_POINTER_OFFSET - 16)
area_bottom = STACK_POINTER_OFFSET - 16;
if (area_top < STACK_POINTER_OFFSET - 8)
area_top = STACK_POINTER_OFFSET - 8;
}
if (regs_ever_live[19] && !global_regs[19])
{
if (area_bottom > STACK_POINTER_OFFSET - 8)
area_bottom = STACK_POINTER_OFFSET - 8;
if (area_top < STACK_POINTER_OFFSET)
area_top = STACK_POINTER_OFFSET;
}
for (i = 18; i < 20; i++)
if (regs_ever_live[i] && !global_regs[i])
{
if (area_bottom > 16*UNITS_PER_WORD + 8*(i-16))
area_bottom = 16*UNITS_PER_WORD + 8*(i-16);
if (area_top < 16*UNITS_PER_WORD + 8*(i-16) + 8)
area_top = 16*UNITS_PER_WORD + 8*(i-16) + 8;
}
}
/* Check whether we can access the register save area.
@ -5760,8 +5736,6 @@ s390_emit_epilogue (void)
if (TARGET_64BIT)
{
int i;
if (cfun->machine->save_fprs_p)
for (i = 24; i < 32; i++)
if (regs_ever_live[i] && !global_regs[i])
@ -5770,10 +5744,10 @@ s390_emit_epilogue (void)
}
else
{
if (regs_ever_live[18] && !global_regs[18])
restore_fpr (frame_pointer, offset + STACK_POINTER_OFFSET - 16, 18);
if (regs_ever_live[19] && !global_regs[19])
restore_fpr (frame_pointer, offset + STACK_POINTER_OFFSET - 8, 19);
for (i = 18; i < 20; i++)
if (regs_ever_live[i] && !global_regs[i])
restore_fpr (frame_pointer,
offset + 16*UNITS_PER_WORD + 8*(i-16), i);
}
/* Return register. */