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rs6000.c (rs6000_emit_probe_stack_rang): Adjust.

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* config/rs6000/rs6000.c (rs6000_emit_probe_stack_rang): Adjust.
	(output_probe_stack_range): Rotate the loop and simplify.

From-SVN: r230413
This commit is contained in:
Eric Botcazou 2015-11-16 12:17:51 +00:00 committed by Eric Botcazou
parent 16c6f54ffa
commit c0f39947f8
2 changed files with 21 additions and 19 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-11-16 Eric Botcazou <ebotcazou@adacore.com>
* config/rs6000/rs6000.c (rs6000_emit_probe_stack_rang): Adjust.
(output_probe_stack_range): Rotate the loop and simplify.
2015-11-16 Eric Botcazou <ebotcazou@adacore.com>
* config/i386/i386.c (ix86_adjust_stack_and_probe): Adjust and use

35
gcc/config/rs6000/rs6000.c
View File

@ -24233,11 +24233,12 @@ rs6000_emit_probe_stack_range (HOST_WIDE_INT first, HOST_WIDE_INT size)
/* Step 3: the loop
while (TEST_ADDR != LAST_ADDR)
do
{
TEST_ADDR = TEST_ADDR + PROBE_INTERVAL
probe at TEST_ADDR
}
while (TEST_ADDR != LAST_ADDR)
probes at FIRST + N * PROBE_INTERVAL for values of N from 1
until it is equal to ROUNDED_SIZE. */
@ -24263,39 +24264,35 @@ const char *
output_probe_stack_range (rtx reg1, rtx reg2)
{
static int labelno = 0;
char loop_lab[32], end_lab[32];
char loop_lab[32];
rtx xops[2];
ASM_GENERATE_INTERNAL_LABEL (loop_lab, "LPSRL", labelno);
ASM_GENERATE_INTERNAL_LABEL (end_lab, "LPSRE", labelno++);
ASM_GENERATE_INTERNAL_LABEL (loop_lab, "LPSRL", labelno++);
/* Loop. */
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, loop_lab);
/* Jump to END_LAB if TEST_ADDR == LAST_ADDR. */
/* TEST_ADDR = TEST_ADDR + PROBE_INTERVAL. */
xops[0] = reg1;
xops[1] = GEN_INT (-PROBE_INTERVAL);
output_asm_insn ("addi %0,%0,%1", xops);
/* Probe at TEST_ADDR. */
xops[1] = gen_rtx_REG (Pmode, 0);
output_asm_insn ("stw %1,0(%0)", xops);
/* Test if TEST_ADDR == LAST_ADDR. */
xops[1] = reg2;
if (TARGET_64BIT)
output_asm_insn ("cmpd 0,%0,%1", xops);
else
output_asm_insn ("cmpw 0,%0,%1", xops);
fputs ("\tbeq 0,", asm_out_file);
assemble_name_raw (asm_out_file, end_lab);
fputc ('\n', asm_out_file);
/* TEST_ADDR = TEST_ADDR + PROBE_INTERVAL. */
xops[1] = GEN_INT (-PROBE_INTERVAL);
output_asm_insn ("addi %0,%0,%1", xops);
/* Probe at TEST_ADDR and branch. */
xops[1] = gen_rtx_REG (Pmode, 0);
output_asm_insn ("stw %1,0(%0)", xops);
fprintf (asm_out_file, "\tb ");
/* Branch. */
fputs ("\tbne 0,", asm_out_file);
assemble_name_raw (asm_out_file, loop_lab);
fputc ('\n', asm_out_file);
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, end_lab);
return "";
}