45 lines
1.3 KiB
Diff
45 lines
1.3 KiB
Diff
2020-01-23 Jakub Jelinek <jakub@redhat.com>
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PR rtl-optimization/93402
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* postreload.c (reload_combine_recognize_pattern): Don't try to adjust
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USE insns.
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* gcc.c-torture/execute/pr93402.c: New test.
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--- a/gcc/postreload.c.jj 2020-01-12 11:54:36.000000000 +0100
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+++ b/gcc/postreload.c 2020-01-23 17:23:25.359929516 +0100
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@@ -1078,6 +1078,10 @@ reload_combine_recognize_pattern (rtx_in
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struct reg_use *use = reg_state[regno].reg_use + i;
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if (GET_MODE (*use->usep) != mode)
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return false;
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+ /* Don't try to adjust (use (REGX)). */
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+ if (GET_CODE (PATTERN (use->insn)) == USE
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+ && &XEXP (PATTERN (use->insn), 0) == use->usep)
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+ return false;
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}
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/* Look for (set (REGX) (CONST_INT))
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--- a/gcc/testsuite/gcc.c-torture/execute/pr93402.c.jj 2020-01-23 17:25:46.496803852 +0100
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+++ b/gcc/testsuite/gcc.c-torture/execute/pr93402.c 2020-01-23 17:25:05.221425501 +0100
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@@ -0,0 +1,21 @@
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+/* PR rtl-optimization/93402 */
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+
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+struct S { unsigned int a; unsigned long long b; };
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+
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+__attribute__((noipa)) struct S
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+foo (unsigned long long x)
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+{
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+ struct S ret;
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+ ret.a = 0;
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+ ret.b = x * 11111111111ULL + 111111111111ULL;
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+ return ret;
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+}
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+
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+int
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+main ()
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+{
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+ struct S a = foo (1);
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+ if (a.a != 0 || a.b != 122222222222ULL)
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+ __builtin_abort ();
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+ return 0;
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+}
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