From: Richard Henderson <richard.henderson@linaro.org>
Date: Thu, 6 Apr 2023 01:43:47 +0000 (-0700)
Subject: tcg/riscv: Conditionalize tcg_out_exts_i32_i64
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=3ea9be33400f14305565a9a094cb6031c07183d5;p=qemu.git

tcg/riscv: Conditionalize tcg_out_exts_i32_i64

Since TCG_TYPE_I32 values are kept sign-extended in registers, via "w"
instructions, we don't need to extend if the register matches.
This is already relied upon by comparisons.

Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---

diff --git a/tcg/riscv/tcg-target.c.inc b/tcg/riscv/tcg-target.c.inc
index 328cbc0ad6..266fe1433d 100644
--- a/tcg/riscv/tcg-target.c.inc
+++ b/tcg/riscv/tcg-target.c.inc
@@ -609,7 +609,9 @@ static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg)
 
 static void tcg_out_exts_i32_i64(TCGContext *s, TCGReg ret, TCGReg arg)
 {
-    tcg_out_ext32s(s, ret, arg);
+    if (ret != arg) {
+        tcg_out_ext32s(s, ret, arg);
+    }
 }
 
 static void tcg_out_extu_i32_i64(TCGContext *s, TCGReg ret, TCGReg arg)