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51 lines
1.8 KiB
51 lines
1.8 KiB
5 months ago
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commit b6532d0edd50a6086a84ca748fe49c5a9d28f155
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Author: Marek Polacek <polacek@redhat.com>
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Date: Wed Jul 5 17:43:31 2023 -0400
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testsuite: fix dwarf2/utf-1.C with DWARF4
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Running
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$ make check-c++ RUNTESTFLAGS='--target_board=unix\{-gdwarf-5,-gdwarf-4\} dwarf2.exp=utf-1.C'
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shows
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FAIL: g++.dg/debug/dwarf2/utf-1.C -std=gnu++20 scan-assembler-times DW_AT_encoding \\(0x10\\) 3
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because with -gdwarf-4 the output is:
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.byte 0x10 # DW_AT_encoding
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but with -gdwarf-5 the output is the expected:
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# DW_AT_encoding (0x10)
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The difference is caused by the DWARF5 optimize_implicit_const
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optimization:
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<https://gcc.gnu.org/pipermail/gcc-patches/2016-October/459762.html>
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I suppose we could do what testsuite/rust/debug/chartype.rs does
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and just run the test with -gdwarf-4.
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gcc/testsuite/ChangeLog:
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* g++.dg/debug/dwarf2/utf-1.C: Use -gdwarf-4. Adjust expected
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output.
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diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/utf-1.C b/gcc/testsuite/g++.dg/debug/dwarf2/utf-1.C
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index 43b354f1bb5..0ce4d8727d6 100644
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--- a/gcc/testsuite/g++.dg/debug/dwarf2/utf-1.C
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+++ b/gcc/testsuite/g++.dg/debug/dwarf2/utf-1.C
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@@ -1,8 +1,13 @@
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// { dg-do compile { target c++20 } }
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-// { dg-options { -gdwarf -dA } }
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+// { dg-options { -gdwarf-4 -dA } }
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// Test that all three use DW_ATE_UTF.
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-// { dg-final { scan-assembler-times {DW_AT_encoding \(0x10\)} 3 } }
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+// This test uses -gdwarf-4 since in DWARF5 optimize_implicit_const
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+// would optimize the output from:
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+// .byte 0x10 # DW_AT_encoding
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+// into:
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+// # DW_AT_encoding (0x10)
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+// { dg-final { scan-assembler-times "0x10\[ \t]\[^\n\r]* DW_AT_encoding" 3 } }
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char8_t c8;
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char16_t c16;
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