tcg/sparc64: Allocate %g2 as a third temporary

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/tcg/sparc64/tcg-target.c.inc b/tcg/sparc64/tcg-target.c.inc
index e997db264544342d6a26184f65756eb3a2be4055..64464ab3631d8d2f96b5207630502e92438fe831 100644 (file)
--- a/tcg/sparc64/tcg-target.c.inc
+++ b/tcg/sparc64/tcg-target.c.inc
@@ -83,9 +83,10 @@ static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
 #define ALL_GENERAL_REGS     MAKE_64BIT_MASK(0, 32)
 #define ALL_QLDST_REGS       (ALL_GENERAL_REGS & ~SOFTMMU_RESERVE_REGS)
 
-/* Define some temporary registers.  T2 is used for constant generation.  */
+/* Define some temporary registers.  T3 is used for constant generation.  */
 #define TCG_REG_T1  TCG_REG_G1
-#define TCG_REG_T2  TCG_REG_O7
+#define TCG_REG_T2  TCG_REG_G2
+#define TCG_REG_T3  TCG_REG_O7
 
 #ifndef CONFIG_SOFTMMU
 # define TCG_GUEST_BASE_REG TCG_REG_I5
@@ -110,7 +111,6 @@ static const int tcg_target_reg_alloc_order[] = {
     TCG_REG_I4,
     TCG_REG_I5,
 
-    TCG_REG_G2,
     TCG_REG_G3,
     TCG_REG_G4,
     TCG_REG_G5,
@@ -492,8 +492,8 @@ static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret,
 static void tcg_out_movi(TCGContext *s, TCGType type,
                          TCGReg ret, tcg_target_long arg)
 {
-    tcg_debug_assert(ret != TCG_REG_T2);
-    tcg_out_movi_int(s, type, ret, arg, false, TCG_REG_T2);
+    tcg_debug_assert(ret != TCG_REG_T3);
+    tcg_out_movi_int(s, type, ret, arg, false, TCG_REG_T3);
 }
 
 static void tcg_out_ext8s(TCGContext *s, TCGType type, TCGReg rd, TCGReg rs)
@@ -885,10 +885,8 @@ static void tcg_out_jmpl_const(TCGContext *s, const tcg_insn_unit *dest,
 {
     uintptr_t desti = (uintptr_t)dest;
 
-    /* Be careful not to clobber %o7 for a tail call. */
     tcg_out_movi_int(s, TCG_TYPE_PTR, TCG_REG_T1,
-                     desti & ~0xfff, in_prologue,
-                     tail_call ? TCG_REG_G2 : TCG_REG_O7);
+                     desti & ~0xfff, in_prologue, TCG_REG_T2);
     tcg_out_arithi(s, tail_call ? TCG_REG_G0 : TCG_REG_O7,
                    TCG_REG_T1, desti & 0xfff, JMPL);
 }
@@ -1856,6 +1854,7 @@ static void tcg_target_init(TCGContext *s)
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_O6); /* stack pointer */
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_T1); /* for internal use */
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_T2); /* for internal use */
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_T3); /* for internal use */
 }
 
 #define ELF_HOST_MACHINE  EM_SPARCV9