From 48cb51827c9eb991b92014a3f59d31eb237ce03f Mon Sep 17 00:00:00 2001
From: "Vladimir N. Makarov" <vmakarov@redhat.com>
Date: Fri, 8 Dec 2023 15:37:42 -0500
Subject: [PATCH] [PR112875][LRA]: Fix an assert in lra elimination code

PR112875 test ran into a wrong assert (gcc_unreachable) in elimination
in a debug insn.  The insn seems ok.  So I change the assertion.
To be more accurate I made it the same as analogous reload pass code.

gcc/ChangeLog:

	PR rtl-optimization/112875
	* lra-eliminations.cc (lra_eliminate_regs_1): Change an assert.
	Add ASM_OPERANDS case.

gcc/testsuite/ChangeLog:

	PR rtl-optimization/112875
	* gcc.target/i386/pr112875.c: New test.
---
 gcc/lra-eliminations.cc                  |  4 +++
 gcc/testsuite/gcc.target/i386/pr112875.c | 33 ++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 gcc/testsuite/gcc.target/i386/pr112875.c

diff --git a/gcc/lra-eliminations.cc b/gcc/lra-eliminations.cc
index f3b75e083901..cf229b402daa 100644
--- a/gcc/lra-eliminations.cc
+++ b/gcc/lra-eliminations.cc
@@ -666,6 +666,10 @@ lra_eliminate_regs_1 (rtx_insn *insn, rtx x, machine_mode mem_mode,
       return x;
 
     case CLOBBER:
+    case ASM_OPERANDS:
+      gcc_assert (insn && DEBUG_INSN_P (insn));
+      break;
+
     case SET:
       gcc_unreachable ();
 
diff --git a/gcc/testsuite/gcc.target/i386/pr112875.c b/gcc/testsuite/gcc.target/i386/pr112875.c
new file mode 100644
index 000000000000..b704404b2480
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr112875.c
@@ -0,0 +1,33 @@
+/* { dg-do compile } */
+/* { dg-options "-Oz -frounding-math -fno-dce -fno-trapping-math -fno-tree-dce -fno-tree-dse -g" } */
+long a, f;
+int b, c, d, g, h, i, j;
+char e;
+void k(long, int l, char t) {
+  char m = b, n = g, o = 0;
+  int p, q, r = h;
+  long s = g;
+  if (f) {
+    q = t + (float)16777217;
+    o = ~0;
+  }
+  if (e) {
+    d = g + a;
+    if (d % (a % l)) {
+      p = d;
+      n = b;
+    }
+    if (l) {
+      i = b;
+      r = a;
+      p = h;
+    }
+    if (s)
+      s = q;
+    c = f;
+    e += t;
+    a = p;
+  }
+  j = r % n;
+  s += g / 0xc000000000000000 + !o;
+}
-- 
2.47.2