[gcc r13-2178] Fix PR 106600: __builtin_bswap32 is not hooked up for ZBB for 32bit

[gcc r13-2178] Fix PR 106600: __builtin_bswap32 is not hooked up for ZBB for 32bit

[Andrew Pinski]

https://gcc.gnu.org/g:cb2daf5acce003300ee948a89860c0d13ebcae79

commit r13-2178-gcb2daf5acce003300ee948a89860c0d13ebcae79
Author: Andrew Pinski <apinski@marvell.com>
Date:   Fri Aug 19 17:01:02 2022 +0000

    Fix PR 106600: __builtin_bswap32 is not hooked up for ZBB for 32bit
    
    The problem here is the bswap<mode>2 pattern had a check for TARGET_64BIT
    but then used the X iterator. Since the X iterator is either SI or DI depending
    on the setting TARGET_64BIT, there is no reason for the TARGET_64BIT.
    
    OK? Built and tested on both riscv32-linux-gnu and riscv64-linux-gnu.
    
    Thanks,
    Andrew Pinski
    
    gcc/ChangeLog:
    
            PR target/106600
            * config/riscv/bitmanip.md (bswap<mode>2): Remove
            condition on TARGET_64BIT as X is already conditional there.
    
    gcc/testsuite/ChangeLog:
    
            PR target/106600
            * gcc.target/riscv/zbb_32_bswap-1.c: New test.
            * gcc.target/riscv/zbb_bswap-1.c: New test.

Diff:
---
 gcc/config/riscv/bitmanip.md                    |  2 +-
 gcc/testsuite/gcc.target/riscv/zbb_32_bswap-1.c | 11 +++++++++++
 gcc/testsuite/gcc.target/riscv/zbb_bswap-1.c    | 11 +++++++++++
 3 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/gcc/config/riscv/bitmanip.md b/gcc/config/riscv/bitmanip.md
index d1570ce8508..c7ba667f87a 100644
--- a/gcc/config/riscv/bitmanip.md
+++ b/gcc/config/riscv/bitmanip.md
@@ -272,7 +272,7 @@
 (define_insn "bswap<mode>2"
   [(set (match_operand:X 0 "register_operand" "=r")
         (bswap:X (match_operand:X 1 "register_operand" "r")))]
-  "TARGET_64BIT && TARGET_ZBB"
+  "TARGET_ZBB"
   "rev8\t%0,%1"
   [(set_attr "type" "bitmanip")])
 
diff --git a/gcc/testsuite/gcc.target/riscv/zbb_32_bswap-1.c b/gcc/testsuite/gcc.target/riscv/zbb_32_bswap-1.c
new file mode 100644
index 00000000000..3ff7d9de409
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/zbb_32_bswap-1.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv32gc_zbb -mabi=ilp32" } */
+/* { dg-skip-if "" { *-*-* } { "-O0" } } */
+
+int foo(int n)
+{
+  return __builtin_bswap32(n);
+}
+
+/* { dg-final { scan-assembler "rev8" } } */
+
diff --git a/gcc/testsuite/gcc.target/riscv/zbb_bswap-1.c b/gcc/testsuite/gcc.target/riscv/zbb_bswap-1.c
new file mode 100644
index 00000000000..20feded0df2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/zbb_bswap-1.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gc_zbb -mabi=lp64" } */
+/* { dg-skip-if "" { *-*-* } { "-O0" } } */
+
+int foo(int n)
+{
+  return __builtin_bswap32(n);
+}
+
+/* { dg-final { scan-assembler "rev8" } } */
+