tcg/ppc: Use TCG_REG_TMP2 for scratch tcg_out_qemu_st

In the fallback when STDBRX is not available, avoid clobbering
TCG_REG_TMP1, which might be h.base, which is still in use.
Use TCG_REG_TMP2 instead.

Cc: qemu-stable@nongnu.org
Fixes: 01a112e2e9 ("tcg/ppc: Reorg tcg_out_tlb_read")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Tested-By: Michael Tokarev <mjt@tls.msk.ru>
(cherry picked from commit 4cabcb89b101942346aebff081aa1453e958fe7f)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
index 54816967bca89826def45818c936cbafe1fddd48..192bb2120faf612cc163a86b65e9035ad1337c6f 100644 (file)
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -2556,9 +2556,9 @@ static void tcg_out_qemu_st(TCGContext *s, TCGReg datalo, TCGReg datahi,
         uint32_t insn = qemu_stx_opc[opc & (MO_BSWAP | MO_SIZE)];
         if (!have_isa_2_06 && insn == STDBRX) {
             tcg_out32(s, STWBRX | SAB(datalo, h.base, h.index));
-            tcg_out32(s, ADDI | TAI(TCG_REG_TMP1, h.index, 4));
+            tcg_out32(s, ADDI | TAI(TCG_REG_TMP2, h.index, 4));
             tcg_out_shri64(s, TCG_REG_R0, datalo, 32);
-            tcg_out32(s, STWBRX | SAB(TCG_REG_R0, h.base, TCG_REG_TMP1));
+            tcg_out32(s, STWBRX | SAB(TCG_REG_R0, h.base, TCG_REG_TMP2));
         } else {
             tcg_out32(s, insn | SAB(datalo, h.base, h.index));
         }