===================================================================
@@ -0,0 +1,82 @@
+/* Check that the bswap32 pattern is generated as swap.b and swap.w
+ instructions. */
+/* { dg-do compile { target "sh*-*-*" } } */
+/* { dg-options "-O2" } */
+/* { dg-skip-if "" { "sh*-*-*" } { "-m5*"} { "" } } */
+/* { dg-final { scan-assembler-times "swap.w" 7 } } */
+/* { dg-final { scan-assembler-times "swap.b" 16 } } */
+/* { dg-final { scan-assembler-times "extu.w" 2 } } */
+/* { dg-final { scan-assembler-times "mov" 1 } } */
+/* { dg-final { scan-assembler-not "{shll8|shlr8|shld|shad}" } } */
+
+int
+test_func_00 (int a)
+{
+ /* 1x swap.w
+ 2x swap.b */
+ return __builtin_bswap32 (a);
+}
+
+unsigned int
+test_func_01 (unsigned int a)
+{
+ /* 1x swap.w
+ 2x swap.b */
+ return __builtin_bswap32 (a);
+}
+
+int
+test_func_02 (int a)
+{
+ /* 1x swap.w
+ 2x swap.b */
+ return (((a >> 0) & 0xFF) << 24)
+ | (((a >> 8) & 0xFF) << 16)
+ | (((a >> 16) & 0xFF) << 8)
+ | (((a >> 24) & 0xFF) << 0);
+}
+
+unsigned int
+test_func_03 (unsigned int a)
+{
+ /* 1x swap.w
+ 2x swap.b */
+ return (((a >> 0) & 0xFF) << 24)
+ | (((a >> 8) & 0xFF) << 16)
+ | (((a >> 16) & 0xFF) << 8)
+ | (((a >> 24) & 0xFF) << 0);
+}
+
+int
+test_func_04 (int a)
+{
+ /* 1x swap.b
+ 1x extu.w */
+ return __builtin_bswap32 (a) >> 16;
+}
+
+unsigned short
+test_func_05 (unsigned short a)
+{
+ /* 1x swap.b
+ 1x extu.w */
+ return __builtin_bswap32 (a) >> 16;
+}
+
+long long
+test_func_06 (long long a)
+{
+ /* 2x swap.w
+ 4x swap.b */
+ return __builtin_bswap64 (a);
+}
+
+long long
+test_func_07 (long long a)
+{
+ /* 1x swap.w
+ 2x swap.b
+ 1x mov #0,Rn */
+ return __builtin_bswap64 (a) >> 32;
+}
+
Hello, The attached patch adds a few bswap32 test cases for SH. Tested against rev 189175 with make -k check RUNTESTFLAGS="sh.exp=pr53568-1.c --target_board=sh-sim \{-m2/-ml,-m2/-mb,-m2a/-mb,-m2a-single/-mb,-m4/-ml,-m4/-mb, -m4-single/-ml,-m4-single/-mb,-m4a-single/-ml,-m4a-single/-mb}" to make sure that the test case passes. Cheers, Oleg testsuite/ChangeLog: PR target/53568 * gcc.target/sh/pr53568-1.c: New.