[AArch64][TLSGD Trad][2/2] Implement TLS General Dynamic support for Tiny memory model

[Jiong Wang]

As we have generalized TLS GD code for all memory model in patch 1,
support for tiny model is quite straightforward. We just need to output
different assembly according to memory model.

2015-06-19  Jiong Wang  <jiong.w...@arm.com>

gcc/
  * config/aarch64/aarch64.md (tlsgd): Support tiny model constraint.

gcc/testsuite/
  * gcc.target/aarch64/tlsgd_small.c: New.
  * gcc.target/aarch64/tlsgd_tiny.c: Ditto.
-- 
Regards,
Jiong


commit d82bdca987581dbca6946b0f09e19bae495e79a3
Author: Jiong Wang <jiong.w...@arm.com>
Date:   Mon May 18 17:17:38 2015 +0100

    support GD

diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index 4fe54c9..4adf0a6 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -4263,9 +4263,19 @@
    (clobber (reg:DI LR_REGNUM))
   ]
   ""
-  "adrp\\tx0, %A1\;add\\tx0, x0, %L1\;bl\\t%2\;nop"
+  {
+    if (aarch64_cmodel_var == AARCH64_CMODEL_TINY)
+      return "adr\tx0, %A1;bl\t%2;nop";
+    else if (aarch64_cmodel_var == AARCH64_CMODEL_SMALL)
+      return "adrp\tx0, %A1;add\tx0, x0, %L1;bl\t%2;nop";
+    else
+      /* TBD: Large model to be supported.  */
+      gcc_unreachable ();
+  }
   [(set_attr "type" "call")
-   (set_attr "length" "16")])
+   (set (attr "length")
+	 (if_then_else (match_test "aarch64_cmodel_var == AARCH64_CMODEL_TINY")
+	 (const_int 12) (const_int 16)))])
 
 (define_insn "tlsie_small_<mode>"
   [(set (match_operand:PTR 0 "register_operand" "=r")
diff --git a/gcc/testsuite/gcc.target/aarch64/tlsgd_small.c b/gcc/testsuite/gcc.target/aarch64/tlsgd_small.c
new file mode 100644
index 0000000..b77b94d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/tlsgd_small.c
@@ -0,0 +1,9 @@
+/* { dg-do run } */
+/* { dg-require-effective-target tls_native } */
+/* { dg-options "-O2 -ftls-model=global-dynamic -fPIC -mtls-dialect=trad --save-temps" } */
+
+#include "tls.c"
+
+/* { dg-final { scan-assembler-times "adrp\tx\[0-9\]+, :tlsgd:" 2 } } */
+/* { dg-final { scan-assembler-times "bl\t__tls_get_addr" 2 } } */
+/* { dg-final { cleanup-saved-temps } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/tlsgd_tiny.c b/gcc/testsuite/gcc.target/aarch64/tlsgd_tiny.c
new file mode 100644
index 0000000..26365ae
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/tlsgd_tiny.c
@@ -0,0 +1,9 @@
+/* { dg-do run } */
+/* { dg-require-effective-target tls_native } */
+/* { dg-options "-O2 -ftls-model=global-dynamic -fPIC -mtls-dialect=trad -mcmodel=tiny --save-temps" } */
+
+#include "tls.c"
+
+/* { dg-final { scan-assembler-times "adr\tx\[0-9\]+, :tlsgd:" 2 } } */
+/* { dg-final { scan-assembler-times "bl\t__tls_get_addr" 2 } } */
+/* { dg-final { cleanup-saved-temps } } */