[PATCH 4/6] rs6000: Fix stack probes for -m32 -mpowerpc64

[Segher Boessenkool]

This fixes 3 FAILs.

The generic emit_stack_probe (that is used for probe_stack patterns) uses
word_mode, which won't fly for -m32 -mpowerpc64.  Use probe_stack_address
instead, and create the MEM by hand.


2015-01-16  Segher Boessenkool  <seg...@kernel.crashing.org>

gcc/
        * config/rs6000/rs6000.md (probe_stack): Delete.
        (probe_stack_address): New.

---
 gcc/config/rs6000/rs6000.md | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index a97cc1d..570d28f 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -11691,11 +11691,13 @@ (define_insn "blockage"
   ""
   "")
 
-(define_expand "probe_stack"
-  [(set (match_operand 0 "memory_operand" "=m")
-        (unspec [(const_int 0)] UNSPEC_PROBE_STACK))]
+(define_expand "probe_stack_address"
+  [(use (match_operand 0 "address_operand"))]
   ""
 {
+  operands[0] = gen_rtx_MEM (Pmode, operands[0]);
+  MEM_VOLATILE_P (operands[0]) = 1;
+
   if (TARGET_64BIT)
     emit_insn (gen_probe_stack_di (operands[0]));
   else
-- 
1.8.1.4






---
 gcc/config/rs6000/rs6000.md | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index a97cc1d..570d28f 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -11691,11 +11691,12 @@ (define_insn "blockage"
   ""
   "")
 
-(define_expand "probe_stack"
-  [(set (match_operand 0 "memory_operand" "=m")
-        (unspec [(const_int 0)] UNSPEC_PROBE_STACK))]
+(define_expand "probe_stack_address"
+  [(use (match_operand 0 "address_operand"))]
   ""
 {
+  operands[0] = gen_rtx_MEM (Pmode, operands[0]);
+
   if (TARGET_64BIT)
     emit_insn (gen_probe_stack_di (operands[0]));
   else
-- 
1.8.1.4