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: r173488

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5a4c1cdfc998fa3ad2f9fda134429de83fc07706..acd049f46038916ac552d600b84da639f90df1cc 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-06  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.
+
 2011-05-06  Uros Bizjak  <ubizjak@gmail.com>
 
        * config/i386/i386.md (*movdf_internal_nointeger): Apply "*"

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index b756ba36e767873db706d8715c32bd0d153bcd2f..d4851ad4d27b423f158fd4e4c4b19cc60fd4de06 100644 (file)
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -6407,10 +6407,11 @@ 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)
@@ -6427,11 +6428,12 @@ 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)