[gomp-nvptx 7/7] nvptx backend: define STACK_SIZE_MODE

[Alexander Monakov]

Default definition of STACK_SIZE_MODE is word_mode, which is DImode on NVPTX.
However, stack pointer mode matches pointer mode, so needs to be SImode on
32-bit NVPTX ABI.  Define it to Pmode to fix 32-bit code generation.

	* config/nvptx/nvptx.h (STACK_SIZE_MODE): Define.
---
 gcc/ChangeLog.gomp-nvptx | 4 ++++
 gcc/config/nvptx/nvptx.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/gcc/config/nvptx/nvptx.h b/gcc/config/nvptx/nvptx.h
index 7810cca..6da4d06 100644
--- a/gcc/config/nvptx/nvptx.h
+++ b/gcc/config/nvptx/nvptx.h
@@ -83,6 +83,7 @@
 
 #define POINTER_SIZE (TARGET_ABI64 ? 64 : 32)
 #define Pmode (TARGET_ABI64 ? DImode : SImode)
+#define STACK_SIZE_MODE Pmode
 
 /* Registers.  Since ptx is a virtual target, we just define a few
    hard registers for special purposes and leave pseudos unallocated.