re PR target/48900 (unnecessary duplicate __tls_get_addr calls)

	PR target/48900
	* config/rs6000/rs6000.c (rs6000_legitimize_tls_address): Use
	const0_rtx as the arg to the dummy __tls_get_addr libcall.

From-SVN: r173490

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d6036fb77813faa76246f8f70d0dbe1f5aeb4b39..2d30a6c263fff15686d2f920d4c2a8b00b452c03 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-07  Alan Modra  <amodra@gmail.com>
+
+       PR target/48900
+       * config/rs6000/rs6000.c (rs6000_legitimize_tls_address): Use
+       const0_rtx as the arg to the dummy __tls_get_addr libcall.
+
 2011-05-05  Jason Merrill  <jason@redhat.com>
 
        PR c++/40975

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 3d8d345af64acdd28f003044015da31b53f4a9af..bc31809f0b4b189da932db1ce4821a3bded2ddec 100644 (file)
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -5426,10 +5426,11 @@ rs6000_legitimize_tls_address (rtx addr, enum tls_model model)
 
       if (model == TLS_MODEL_GLOBAL_DYNAMIC)
        {
-         r3 = gen_rtx_REG (Pmode, 3);
          tga = rs6000_tls_get_addr ();
-         emit_library_call_value (tga, dest, LCT_CONST, Pmode, 1, r3, Pmode);
+         emit_library_call_value (tga, dest, LCT_CONST, Pmode,
+                                  1, const0_rtx, Pmode);
 
+         r3 = gen_rtx_REG (Pmode, 3);
          if (DEFAULT_ABI == ABI_AIX && TARGET_64BIT)
            insn = gen_tls_gd_aix64 (r3, got, addr, tga, const0_rtx);
          else if (DEFAULT_ABI == ABI_AIX && !TARGET_64BIT)
@@ -5446,11 +5447,12 @@ rs6000_legitimize_tls_address (rtx addr, enum tls_model model)
        }
       else if (model == TLS_MODEL_LOCAL_DYNAMIC)
        {
-         r3 = gen_rtx_REG (Pmode, 3);
          tga = rs6000_tls_get_addr ();
          tmp1 = gen_reg_rtx (Pmode);
-         emit_library_call_value (tga, tmp1, LCT_CONST, Pmode, 1, r3, Pmode);
+         emit_library_call_value (tga, tmp1, LCT_CONST, Pmode,
+                                  1, const0_rtx, Pmode);
 
+         r3 = gen_rtx_REG (Pmode, 3);
          if (DEFAULT_ABI == ABI_AIX && TARGET_64BIT)
            insn = gen_tls_ld_aix64 (r3, got, tga, const0_rtx);
          else if (DEFAULT_ABI == ABI_AIX && !TARGET_64BIT)