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| author | Jakub Jelinek <jakub@redhat.com> | 2021-08-23 11:50:14 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2021-08-23 11:50:14 +0200 |
| commit | b284053bb75661fc1bf13c275f3ba5364bb17608 (patch) | |
| tree | ca6bb8b9025081593f9526debac0fb624756580b | |
| parent | ac3bcc813f26e6dc4c3b037d9d5c5a84f7f62cf4 (diff) | |
| download | gcc-b284053bb75661fc1bf13c275f3ba5364bb17608.zip gcc-b284053bb75661fc1bf13c275f3ba5364bb17608.tar.gz gcc-b284053bb75661fc1bf13c275f3ba5364bb17608.tar.bz2 | |
dwarf2out: Emit DW_AT_location for global register vars during early dwarf [PR101905]
The following patch emits DW_AT_location for global register variables
already during early dwarf, since usually late_global_decl hook isn't even
called for those, as nothing needs to be emitted for them.
2021-08-23 Jakub Jelinek <jakub@redhat.com>
PR debug/101905
* dwarf2out.c (gen_variable_die): Add DW_AT_location for global
register variables already during early_dwarf if possible.
* gcc.dg/guality/pr101905.c: New test.
| -rw-r--r-- | gcc/dwarf2out.c | 21 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/guality/pr101905.c | 15 |
2 files changed, 35 insertions, 1 deletions
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index ba0a6d6..07a479f 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -24476,7 +24476,26 @@ gen_variable_die (tree decl, tree origin, dw_die_ref context_die) && DECL_RTL_SET_P (decl_or_origin)))) { if (early_dwarf) - add_pubname (decl_or_origin, var_die); + { + add_pubname (decl_or_origin, var_die); + /* For global register variables, emit DW_AT_location if possible + already during early_dwarf, as late_global_decl won't be usually + called. */ + if (DECL_HARD_REGISTER (decl_or_origin) + && TREE_STATIC (decl_or_origin) + && !decl_by_reference_p (decl_or_origin) + && !get_AT (var_die, DW_AT_location) + && !get_AT (var_die, DW_AT_const_value) + && DECL_RTL_SET_P (decl_or_origin) + && REG_P (DECL_RTL (decl_or_origin))) + { + dw_loc_descr_ref descr + = reg_loc_descriptor (DECL_RTL (decl_or_origin), + VAR_INIT_STATUS_INITIALIZED); + if (descr) + add_AT_loc (var_die, DW_AT_location, descr); + } + } else add_location_or_const_value_attribute (var_die, decl_or_origin, decl == NULL); diff --git a/gcc/testsuite/gcc.dg/guality/pr101905.c b/gcc/testsuite/gcc.dg/guality/pr101905.c new file mode 100644 index 0000000..71b7516 --- /dev/null +++ b/gcc/testsuite/gcc.dg/guality/pr101905.c @@ -0,0 +1,15 @@ +/* { dg-do run { target { { i?86-*-* x86_64-*-* } && lp64 } } } */ +/* { dg-options "-g -ffixed-r15" } */ +/* { dg-skip-if "" { *-*-* } { "*" } { "-O0" } } */ + +register unsigned long long regVar asm ("r15"); + +int +main() +{ + regVar = 0xdeadbeefcafebabeULL; + asm ("nop" : "+r" (regVar)); + asm volatile ("nop"); /* { dg-final { gdb-test . "regVar" "0xdeadbeefcafebabeULL" } } */ + asm volatile ("nop" : : "r" (regVar)); + return 0; +} |