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authorJakub Jelinek <jakub@redhat.com>2022-04-19 18:58:59 +0200
committerJakub Jelinek <jakub@redhat.com>2022-04-19 18:58:59 +0200
commiteeca2b8bd03f57c59c6cf48bf6b9bd6dc86924f6 (patch)
treeccc98793e6bc5039fe7df862c95a90f5d25eba58
parenteb03e424598d30fed68801af6d6ef6236d32e32e (diff)
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sparc: Preserve ORIGINAL_REGNO in epilogue_renumber [PR105257]
The following testcase ICEs, because the pic register is (reg:DI 24 %i0 [109]) and is used in the delay slot of a return. We invoke epilogue_renumber and that changes it to (reg:DI 8 %o0) which no longer satisfies sparc_pic_register_p predicate, so we don't recognize the insn anymore. The following patch fixes that by preserving ORIGINAL_REGNO if specified, so we get (reg:DI 8 %o0 [109]) instead. 2022-04-19 Jakub Jelinek <jakub@redhat.com> PR target/105257 * config/sparc/sparc.cc (epilogue_renumber): If ORIGINAL_REGNO, use gen_raw_REG instead of gen_rtx_REG and copy over also ORIGINAL_REGNO. Use return 0; instead of /* fallthrough */. * gcc.dg/pr105257.c: New test.
-rw-r--r--gcc/config/sparc/sparc.cc16
-rw-r--r--gcc/testsuite/gcc.dg/pr105257.c16
2 files changed, 30 insertions, 2 deletions
diff --git a/gcc/config/sparc/sparc.cc b/gcc/config/sparc/sparc.cc
index bb4ce88..467a9f1 100644
--- a/gcc/config/sparc/sparc.cc
+++ b/gcc/config/sparc/sparc.cc
@@ -8884,8 +8884,20 @@ epilogue_renumber (rtx *where, int test)
if (REGNO (*where) >= 8 && REGNO (*where) < 24) /* oX or lX */
return 1;
if (! test && REGNO (*where) >= 24 && REGNO (*where) < 32)
- *where = gen_rtx_REG (GET_MODE (*where), OUTGOING_REGNO (REGNO(*where)));
- /* fallthrough */
+ {
+ if (ORIGINAL_REGNO (*where))
+ {
+ rtx n = gen_raw_REG (GET_MODE (*where),
+ OUTGOING_REGNO (REGNO (*where)));
+ ORIGINAL_REGNO (n) = ORIGINAL_REGNO (*where);
+ *where = n;
+ }
+ else
+ *where = gen_rtx_REG (GET_MODE (*where),
+ OUTGOING_REGNO (REGNO (*where)));
+ }
+ return 0;
+
case SCRATCH:
case PC:
case CONST_INT:
diff --git a/gcc/testsuite/gcc.dg/pr105257.c b/gcc/testsuite/gcc.dg/pr105257.c
new file mode 100644
index 0000000..4232942
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr105257.c
@@ -0,0 +1,16 @@
+/* PR target/105257 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-additional-options "-fpic" { target fpic } } */
+
+extern int sigsetjmp (void **, int);
+void *buf[32];
+void (*fn) (void);
+
+const char *
+bar (void)
+{
+ sigsetjmp (buf, 0);
+ fn ();
+ return "";
+}