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https://gcc.gnu.org/PR91269
From bebaf06774baca584c7e9f8410d0e49606a11d60 Mon Sep 17 00:00:00 2001
From: ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 20 Sep 2019 09:42:40 +0000
Subject: [PATCH] PR target/91269 * config/sparc/sparc.h
(HARD_REGNO_CALLER_SAVE_MODE): Define.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@275994 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/config/sparc/sparc.h | 7 ++++
gcc/testsuite/gcc.dg/pr91269.c | 70 ++++++++++++++++++++++++++++++++++
--- a/gcc/config/sparc/sparc.h
+++ b/gcc/config/sparc/sparc.h
@@ -711,6 +711,13 @@ along with GCC; see the file COPYING3. If not see
register window instruction in the prologue. */
#define HARD_REGNO_RENAME_OK(FROM, TO) ((FROM) != 1)
+/* Select a register mode required for caller save of hard regno REGNO.
+ Contrary to what is documented, the default is not the smallest suitable
+ mode but the largest suitable mode for the given (REGNO, NREGS) pair and
+ it quickly creates paradoxical subregs that can be problematic. */
+#define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \
+ ((MODE) == VOIDmode ? choose_hard_reg_mode (REGNO, NREGS, false) : (MODE))
+
/* Specify the registers used for certain standard purposes.
The values of these macros are register numbers. */
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr91269.c
@@ -0,0 +1,70 @@
+/* PR target/91269 */
+/* Testcase by Sergei Trofimovich <slyfox@inbox.ru> */
+
+/* { dg-do assemble } */
+/* { dg-options "-O2 -Wno-int-conversion" } */
+/* { dg-additional-options "-fcall-used-g6 -fPIE -mcpu=niagara4" { target sparc*-*-* } } */
+
+struct m;
+
+enum { a = 2 };
+int b[1];
+int d[2715];
+int e, f, h;
+enum { i = 2 } j;
+inline int c(int k) {
+ char *cp;
+ if (k >= 62 && k <= 247)
+ cp = b[k];
+ if (cp)
+ return 65533;
+ return 2;
+}
+inline int g(int k) {
+ if (k < sizeof(d))
+ return e;
+ return 0;
+}
+
+int u(struct m*, char*, char*);
+
+int l(struct m *k, char n, long o, int *p) {
+ int q, flags = j, r, s, lasttwo = *p;
+ char inptr, outptr;
+ while (inptr) {
+ if (__builtin_expect(h, 0))
+ break;
+ unsigned ch = inptr;
+ if (lasttwo) {
+ long need = lasttwo >> 3;
+ if (__builtin_expect(need > n, 0))
+ break;
+ } else if (s == i) {
+ long t = c(ch);
+ if (t != 65533) {
+ int jch = g(ch);
+ if (jch & 8)
+ continue;
+ }
+ }
+ if (ch <= 5)
+ ;
+ else {
+ long t = c(ch);
+ if (t != 65533)
+ ;
+ else {
+ switch (f >> 8)
+ case 79:
+ q = f == 20308 || f == 20350;
+ if (q)
+ if (j)
+ r = u(k, &inptr, &outptr);
+ s = *p;
+ if (r)
+ if (o && flags & a)
+ break;
+ }
+ }
+ }
+}
--
2.23.0
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