Hi,
this is a regression present on the mainline/4.6/4.5 branches. I overlooked
the -mregnames business when I changed the probe_stack pattern and, while
this silently works on most platforms, this breaks on Darwin because of the
awkward assembler.
Tested on PowerPC/Darwin by Iain and on PowerPC/Linux by me. OK for mainline
and the 4.6/4.5 branches?
2011-09-06 Eric Botcazou
Iain Sandoe
PR target/50091
* config/rs6000/rs6000.md (probe_stack): Use explicit operand.
* config/rs6000/rs6000.c (output_probe_stack_range): Likewise.
--
Eric Botcazou
Index: config/rs6000/rs6000.c
===
--- config/rs6000/rs6000.c (revision 178488)
+++ config/rs6000/rs6000.c (working copy)
@@ -19303,7 +19303,8 @@ output_probe_stack_range (rtx reg1, rtx
output_asm_insn ("{cal %0,%1(%0)|addi %0,%0,%1}", xops);
/* Probe at TEST_ADDR and branch. */
- output_asm_insn ("{st|stw} 0,0(%0)", xops);
+ xops[1] = gen_rtx_REG (Pmode, 0);
+ output_asm_insn ("{st|stw} %1,0(%0)", xops);
fprintf (asm_out_file, "\tb ");
assemble_name_raw (asm_out_file, loop_lab);
fputc ('\n', asm_out_file);
Index: config/rs6000/rs6000.md
===
--- config/rs6000/rs6000.md (revision 178488)
+++ config/rs6000/rs6000.md (working copy)
@@ -13049,7 +13049,11 @@ (define_insn "probe_stack"
[(set (match_operand 0 "memory_operand" "=m")
(unspec [(const_int 0)] UNSPEC_PROBE_STACK))]
""
- "{st%U0%X0|stw%U0%X0} 0,%0"
+ "*
+{
+ operands[1] = gen_rtx_REG (Pmode, 0);
+ return \"{st%U0%X0|stw%U0%X0} %1,%0\";
+}"
[(set_attr "type" "store")
(set_attr "length" "4")])
