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| author | Uros Bizjak <ubizjak@gmail.com> | 2022-02-03 22:24:21 +0100 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2022-02-03 22:25:21 +0100 |
| commit | 599122fa690d55e5e14d74f4d514b2d8b6a98505 (patch) | |
| tree | bd23a9ee07d4d97be6e321a47aef1c71d5141c32 /gcc | |
| parent | 30d15b512e375dee1b288d66c398513b8cb3e2aa (diff) | |
| download | gcc-599122fa690d55e5e14d74f4d514b2d8b6a98505.zip gcc-599122fa690d55e5e14d74f4d514b2d8b6a98505.tar.gz gcc-599122fa690d55e5e14d74f4d514b2d8b6a98505.tar.bz2 | |
i386: Do not use %ecx DRAP for functions that use __builtin_eh_return [PR104362]
%ecx can't be used for both DRAP register and eh_return. Adjust find_drap_reg
to choose %edi for functions that uses __builtin_eh_return to avoid the assert
in ix86_expand_epilogue that enforces this rule.
2022-02-03 Uroš Bizjak <ubizjak@gmail.com>
gcc/ChangeLog:
PR target/104362
* config/i386/i386.cc (find_drap_reg): For 32bit targets
return DI_REG if function uses __builtin_eh_return.
gcc/testsuite/ChangeLog:
PR target/104362
* gcc.target/i386/pr104362.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/i386.cc | 3 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr104362.c | 24 |
2 files changed, 26 insertions, 1 deletions
diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc index ad5a5ca..dd5584f 100644 --- a/gcc/config/i386/i386.cc +++ b/gcc/config/i386/i386.cc @@ -7400,7 +7400,8 @@ find_drap_reg (void) register in such case. */ if (DECL_STATIC_CHAIN (decl) || cfun->machine->no_caller_saved_registers - || crtl->tail_call_emit) + || crtl->tail_call_emit + || crtl->calls_eh_return) return DI_REG; /* Reuse static chain register if it isn't used for parameter diff --git a/gcc/testsuite/gcc.target/i386/pr104362.c b/gcc/testsuite/gcc.target/i386/pr104362.c new file mode 100644 index 0000000..5e5422e --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr104362.c @@ -0,0 +1,24 @@ +/* PR target/104362 */ +/* { dg-do compile } */ +/* { dg-options "-mavx512f" } */ + +struct _Unwind_Context +{ + void *ra; + char array[48]; +}; + +extern long uw_install_context_1 (struct _Unwind_Context *); + +void +_Unwind_RaiseException (void) +{ + struct _Unwind_Context this_context, cur_context; + __builtin_memset(&this_context, 55, sizeof(this_context)); + long offset = uw_install_context_1 (&this_context); + __builtin_memcpy (&this_context, &cur_context, + sizeof (struct _Unwind_Context)); + void *handler = __builtin_frob_return_addr ((&cur_context)->ra); + uw_install_context_1 (&cur_context); + __builtin_eh_return (offset, handler); +} |