[PATCH] RISC-V: Fix macro fusion for auipc+add, when identifying UNSPEC_AUIPC. [PR113742]

[Monk Chiang]

gcc/ChangeLog:

        PR target/113742
        * config/riscv/riscv.cc (riscv_macro_fusion_pair_p): Fix
        recognizes UNSPEC_AUIPC for RISCV_FUSE_LUI_ADDI.

gcc/testsuite/ChangeLog:

        * gcc.target/riscv/pr113742.c: New test.
---
 gcc/config/riscv/riscv.cc                 | 2 +-
 gcc/testsuite/gcc.target/riscv/pr113742.c | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/riscv/pr113742.c

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 799d7919a4a..4100abc9dd1 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -8434,7 +8434,7 @@ riscv_macro_fusion_pair_p (rtx_insn *prev, rtx_insn *curr)
                                (lo_sum:DI (reg:DI rD) (const_int IMM12))) */
 
       if (GET_CODE (SET_SRC (prev_set)) == UNSPEC
-         && XINT (prev_set, 1) == UNSPEC_AUIPC
+         && XINT (SET_SRC (prev_set), 1) == UNSPEC_AUIPC
          && (GET_CODE (SET_SRC (curr_set)) == LO_SUM
              || (GET_CODE (SET_SRC (curr_set)) == PLUS
                  && SMALL_OPERAND (INTVAL (XEXP (SET_SRC (curr_set), 1))))))
diff --git a/gcc/testsuite/gcc.target/riscv/pr113742.c 
b/gcc/testsuite/gcc.target/riscv/pr113742.c
new file mode 100644
index 00000000000..ab8934c2a8a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/pr113742.c
@@ -0,0 +1,4 @@
+//* { dg-do compile } */
+/* { dg-options "-O2 -finstrument-functions -mabi=lp64d -mcpu=sifive-p670" } */
+
+void foo(void) {}
-- 
2.40.1