Hi,
With ILP32 AARCH64, Pmode (DImode) != ptrmode (SImode) so the variable decl
has a mode of SImode while the register is DImode. So the target that gets
passed down to expand_builtin_thread_pointer is NULL as expand does not
know how to get a subreg for a pointer type.
This fixes the problem by handling a NULL target like we are able to handle
for a non register/correct mode target inside expand_builtin_thread_pointer.
OK? Build and tested for aarch64-elf with no regressions.
Thanks,
Andrew Pinski
* builtins.c (expand_builtin_thread_pointer): Create a new target
when the target is NULL.
---
gcc/ChangeLog | 5 +++++
gcc/builtins.c | 2 +-
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/gcc/builtins.c b/gcc/builtins.c
index 4f1c818..66797fa 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -5699,7 +5699,7 @@ expand_builtin_thread_pointer (tree exp, rtx target)
if (icode != CODE_FOR_nothing)
{
struct expand_operand op;
- if (!REG_P (target) || GET_MODE (target) != Pmode)
+ if (target == NULL_RTX || !REG_P (target) || GET_MODE (target) != Pmode)
target = gen_reg_rtx (Pmode);
create_output_operand (&op, target, Pmode);
expand_insn (icode, 1,&op);