mirror of
https://github.com/pmmp/musl-cross-make.git
synced 2024-11-24 10:46:11 +00:00
03d6d755c7
affects all gcc versions 6.x and later. same patch works for all. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93402
46 lines
1.3 KiB
Diff
46 lines
1.3 KiB
Diff
2020-01-23 Jakub Jelinek <jakub@redhat.com>
|
|
|
|
PR rtl-optimization/93402
|
|
* postreload.c (reload_combine_recognize_pattern): Don't try to adjust
|
|
USE insns.
|
|
|
|
* gcc.c-torture/execute/pr93402.c: New test.
|
|
|
|
--- a/gcc/postreload.c.jj 2020-01-12 11:54:36.000000000 +0100
|
|
+++ b/gcc/postreload.c 2020-01-23 17:23:25.359929516 +0100
|
|
@@ -1078,6 +1078,10 @@ reload_combine_recognize_pattern (rtx_in
|
|
struct reg_use *use = reg_state[regno].reg_use + i;
|
|
if (GET_MODE (*use->usep) != mode)
|
|
return false;
|
|
+ /* Don't try to adjust (use (REGX)). */
|
|
+ if (GET_CODE (PATTERN (use->insn)) == USE
|
|
+ && &XEXP (PATTERN (use->insn), 0) == use->usep)
|
|
+ return false;
|
|
}
|
|
|
|
/* Look for (set (REGX) (CONST_INT))
|
|
--- a/gcc/testsuite/gcc.c-torture/execute/pr93402.c.jj 2020-01-23 17:25:46.496803852 +0100
|
|
+++ b/gcc/testsuite/gcc.c-torture/execute/pr93402.c 2020-01-23 17:25:05.221425501 +0100
|
|
@@ -0,0 +1,21 @@
|
|
+/* PR rtl-optimization/93402 */
|
|
+
|
|
+struct S { unsigned int a; unsigned long long b; };
|
|
+
|
|
+__attribute__((noipa)) struct S
|
|
+foo (unsigned long long x)
|
|
+{
|
|
+ struct S ret;
|
|
+ ret.a = 0;
|
|
+ ret.b = x * 11111111111ULL + 111111111111ULL;
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+int
|
|
+main ()
|
|
+{
|
|
+ struct S a = foo (1);
|
|
+ if (a.a != 0 || a.b != 122222222222ULL)
|
|
+ __builtin_abort ();
|
|
+ return 0;
|
|
+}
|