[PATCH] [AArch64] Fix PR78382

[Hurugalawadi, Naveen]

Hi,

Please find attached the patch that fixes PR78382.

The "SYMBOL_SMALL_TLSGD" was not handled for ILP32. 
Hence it generates error when compiled for ILP32.
The attached patch adds the support and handles it properly as expected 
for ILP32.

Please review the patch and let me know if its okay?

Regression tested on AArch64 with no regressions.

Thanks,
Naveen

2016-11-18  Naveen H.S  <naveen.hurugalaw...@caviumnetworks.com>

        * config/aarch64/aarch64.c (aarch64_load_symref_appropriately):
        Handle SYMBOL_SMALL_TLSGD for ILP32.
        * config/aarch64/aarch64.md : tlsgd_small modified into
        tlsgd_small_<mode> to support SImode and DImode.
        *tlsgd_small modified into *tlsgd_small_<mode> to support SImode and
        DImode.


diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 11d41cf..1688f0d 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -1374,10 +1374,17 @@ aarch64_load_symref_appropriately (rtx dest, rtx imm,
     case SYMBOL_SMALL_TLSGD:
       {
 	rtx_insn *insns;
-	rtx result = gen_rtx_REG (Pmode, R0_REGNUM);
+	rtx result;
+	if (TARGET_ILP32)
+	  result = gen_rtx_REG (SImode, R0_REGNUM);
+	else
+	  result = gen_rtx_REG (DImode, R0_REGNUM);
 
 	start_sequence ();
-	aarch64_emit_call_insn (gen_tlsgd_small (result, imm));
+	if (TARGET_ILP32)
+	  aarch64_emit_call_insn (gen_tlsgd_small_si (result, imm));
+	else
+	  aarch64_emit_call_insn (gen_tlsgd_small_di (result, imm));
 	insns = get_insns ();
 	end_sequence ();
 
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index a652a7c..4833c7f 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -5089,20 +5089,20 @@
 ;; The TLS ABI specifically requires that the compiler does not schedule
 ;; instructions in the TLS stubs, in order to enable linker relaxation.
 ;; Therefore we treat the stubs as an atomic sequence.
-(define_expand "tlsgd_small"
+(define_expand "tlsgd_small_<mode>"
  [(parallel [(set (match_operand 0 "register_operand" "")
                   (call (mem:DI (match_dup 2)) (const_int 1)))
-	     (unspec:DI [(match_operand:DI 1 "aarch64_valid_symref" "")] UNSPEC_GOTSMALLTLS)
+	     (unspec:DI [(match_operand:PTR 1 "aarch64_valid_symref" "")] UNSPEC_GOTSMALLTLS)
 	     (clobber (reg:DI LR_REGNUM))])]
  ""
 {
   operands[2] = aarch64_tls_get_addr ();
 })
 
-(define_insn "*tlsgd_small"
+(define_insn "*tlsgd_small_<mode>"
   [(set (match_operand 0 "register_operand" "")
 	(call (mem:DI (match_operand:DI 2 "" "")) (const_int 1)))
-   (unspec:DI [(match_operand:DI 1 "aarch64_valid_symref" "S")] UNSPEC_GOTSMALLTLS)
+   (unspec:DI [(match_operand:PTR 1 "aarch64_valid_symref" "S")] UNSPEC_GOTSMALLTLS)
    (clobber (reg:DI LR_REGNUM))
   ]
   ""
diff --git a/gcc/testsuite/gcc.target/aarch64/pr78382.c b/gcc/testsuite/gcc.target/aarch64/pr78382.c
new file mode 100644
index 0000000..6c98e5e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/pr78382.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O0 -fpic -mabi=ilp32 -mtls-dialect=trad" } */
+
+__thread int abc;
+void
+foo ()
+{
+  int *p;
+  p = &abc;
+}