[gcc r15-1566] [committed][RISC-V][PR target/114139] Verify we have a CONST_INT before extracting INTVAL

[Jeff Law]

https://gcc.gnu.org/g:fd536b8412d4dae42aa04739c06f99a915be6261

commit r15-1566-gfd536b8412d4dae42aa04739c06f99a915be6261
Author: Jeff Law <jlaw@ventanamicro.com>
Date:   Sun Jun 23 08:26:25 2024 -0600

    [committed][RISC-V][PR target/114139] Verify we have a CONST_INT before extracting INTVAL
    
    Run-of-the-mill checking issue.  We had something like (plus (reg) (reg)) and
    tried to extract INTVAL (XEXP (x, 1)) which of course blows up with checking
    on.
    
    Fixed thusly.   Tested on riscv32-elf in my tester.  riscv64-elf is in flight,
    but won't finish for a while due to other tasks in flight.
    
            PR target/114139
    gcc/
            * config/riscv/riscv.cc (riscv_macro_fusion_pair_p): Verify object
            is a CONST_INT before looking at INTVAL.
    
    gcc/testsuite/
    
            * gcc.target/riscv/pr114139.c: New test.

Diff:
---
 gcc/config/riscv/riscv.cc                 |  1 +
 gcc/testsuite/gcc.target/riscv/pr114139.c | 27 +++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index c17141d909a..5c758b95327 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -9242,6 +9242,7 @@ riscv_macro_fusion_pair_p (rtx_insn *prev, rtx_insn *curr)
 	  && XINT (SET_SRC (prev_set), 1) == UNSPEC_AUIPC
 	  && (GET_CODE (SET_SRC (curr_set)) == LO_SUM
 	      || (GET_CODE (SET_SRC (curr_set)) == PLUS
+		  && CONST_INT_P (XEXP (SET_SRC (curr_set), 1))
 		  && SMALL_OPERAND (INTVAL (XEXP (SET_SRC (curr_set), 1))))))
 
 	return true;
diff --git a/gcc/testsuite/gcc.target/riscv/pr114139.c b/gcc/testsuite/gcc.target/riscv/pr114139.c
new file mode 100644
index 00000000000..1d4eeb65f5c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/pr114139.c
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fpic -mexplicit-relocs -mcpu=sifive-p450" } */
+
+static void *p;
+extern void *a[];
+void
+baz (void)
+{
+  p = 0;
+}
+
+void bar (void);
+void
+foo (int i)
+{
+  bar ();
+  a[i] = p;
+}
+
+
+double *d;
+void
+foobar (int i)
+{
+  for (; i; ++i)
+    d[i] = 1;
+}