From: Richard Henderson <richard.henderson@linaro.org>

Ensure the code structure is the same for matching constraints
and emitting code, lest we allow constants that cannot be
trivially tested.

Cc: qemu-stable@nongnu.org
Fixes: ad788aebbab ("tcg/ppc: Support TCG_COND_TST{EQ,NE}")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2487
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <44328324-af73-4439-9d2b-d414e0e13dd7@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
(cherry picked from commit 682a05280504d2fab32e16096b58d7ea068435c2)
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 7f3829beeb..3553a47ba9 100644
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -325,9 +325,11 @@ static bool tcg_target_const_match(int64_t sval, int ct,
             if ((uval & ~0xffff) == 0 || (uval & ~0xffff0000ull) == 0) {
                 return 1;
             }
-            if (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32
-                ? mask_operand(uval, &mb, &me)
-                : mask64_operand(uval << clz64(uval), &mb, &me)) {
+            if (uval == (uint32_t)uval && mask_operand(uval, &mb, &me)) {
+                return 1;
+            }
+            if (TCG_TARGET_REG_BITS == 64 &&
+                mask64_operand(uval << clz64(uval), &mb, &me)) {
                 return 1;
             }
             return 0;
@@ -1749,8 +1751,6 @@ static void tcg_out_test(TCGContext *s, TCGReg dest, TCGReg arg1, TCGArg arg2,
 
     if (type == TCG_TYPE_I32) {
         arg2 = (uint32_t)arg2;
-    } else if (arg2 == (uint32_t)arg2) {
-        type = TCG_TYPE_I32;
     }
 
     if ((arg2 & ~0xffff) == 0) {
@@ -1761,12 +1761,11 @@ static void tcg_out_test(TCGContext *s, TCGReg dest, TCGReg arg1, TCGArg arg2,
         tcg_out32(s, ANDIS | SAI(arg1, dest, arg2 >> 16));
         return;
     }
-    if (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32) {
-        if (mask_operand(arg2, &mb, &me)) {
-            tcg_out_rlw_rc(s, RLWINM, dest, arg1, 0, mb, me, rc);
-            return;
-        }
-    } else {
+    if (arg2 == (uint32_t)arg2 && mask_operand(arg2, &mb, &me)) {
+        tcg_out_rlw_rc(s, RLWINM, dest, arg1, 0, mb, me, rc);
+        return;
+    }
+    if (TCG_TARGET_REG_BITS == 64) {
         int sh = clz64(arg2);
         if (mask64_operand(arg2 << sh, &mb, &me)) {
             tcg_out_rld_rc(s, RLDICR, dest, arg1, sh, me, rc);
-- 
2.39.2