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From: "sam at gentoo dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/105573] ICE when building numpy on SPARC64
Date: Wed, 11 May 2022 22:03:14 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105573

--- Comment #1 from Sam James <sam at gentoo dot org> ---
It occurs with -mcpu=3Dnative or -mcpu=3Dniagara4 but not if I drop that.

```
$ for t in param target; do cmd=3D"gcc -Q -O2 --help=3D$t"; diff -U0 <(LANG=
=3DC $cmd)
<(LANG=3DC $cmd -mcpu=3Dniagara4); done
--- /dev/fd/63  2022-05-11 15:01:56.915134318 -0700
+++ /dev/fd/62  2022-05-11 15:01:56.915134318 -0700
@@ -85,2 +85,2 @@
-  --param=3Dl1-cache-size=3D               64
-  --param=3Dl2-cache-size=3D               512
+  --param=3Dl1-cache-size=3D               16
+  --param=3Dl2-cache-size=3D               128
@@ -223 +223 @@
-  --param=3Dsimultaneous-prefetches=3D     3
+  --param=3Dsimultaneous-prefetches=3D     2
--- /dev/fd/63  2022-05-11 15:01:56.965136466 -0700
+++ /dev/fd/62  2022-05-11 15:01:56.975136897 -0700
@@ -6 +6 @@
-  -mcbcond                             [disabled]
+  -mcbcond                             [enabled]
@@ -8 +8 @@
-  -mcpu=3D                               v9
+  -mcpu=3D                               niagara4
@@ -16 +16 @@
-  -mfmaf                               [disabled]
+  -mfmaf                               [enabled]
@@ -27 +27 @@
-  -mpopc                               [disabled]
+  -mpopc                               [enabled]
@@ -36 +36 @@
-  -mtune=3D                              v9
+  -mtune=3D                              niagara4
@@ -41,3 +41,3 @@
-  -mvis                                [disabled]
-  -mvis2                               [disabled]
-  -mvis3                               [disabled]
+  -mvis                                [enabled]
+  -mvis2                               [enabled]
+  -mvis3                               [enabled]
```

It looks like -mvis3 is the trigger:
```
$ sparc64-unknown-linux-gnu-gcc -O2 -pipe -c loops.i -mvis3
[...]
during GIMPLE pass: isel
loops.i:3:33: internal compiler error: in gimple_expand_vec_cond_expr, at
gimple-isel.cc:267
    3 | __attribute__((optimize("O3"))) UINT_sign() {
      |                                 ^~~~~~~~~
0x5c4b2f internal_error(char const*, ...)
        ???:0
0x5bc583 fancy_abort(char const*, int, char const*)
        ???:0
[...]
```=