diff options
| author | Uros Bizjak <ubizjak@gmail.com> | 2019-05-07 17:42:42 +0200 |
|---|---|---|
| committer | Uros Bizjak <uros@gcc.gnu.org> | 2019-05-07 17:42:42 +0200 |
| commit | 0a59215131c02dee4c8829f93d1ee678647614da (patch) | |
| tree | 6eb2ab41018cd72b01e17fe77465c63b6837abf0 /gcc/cfgexpand.c | |
| parent | 73e828becf8d33334800c7a8c83b1d7a8967f2a8 (diff) | |
cfgexpand.c (asm_clobber_reg_is_valid): Reject clobbers outside of accessible_reg_set.
* cfgexpand.c (asm_clobber_reg_is_valid): Reject
clobbers outside of accessible_reg_set.
* config/i386/i386.c (ix86_conditional_register_usage):
Disable register sets by clearing corresponding bits in
accessible_reg_set. Do not set corresponding bits in fixed_regs,
call_used_regs and don't clear corresponding reg_names array members.
testsuite/ChangeLog:
* gcc.target/i386/asm-7.c: New test.
* gcc.target/i386/asm-1.c: Update expected error string.
* gcc.target/i386/pr62120.c: Ditto.
From-SVN: r270955
Diffstat (limited to 'gcc/cfgexpand.c')
| -rw-r--r-- | gcc/cfgexpand.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index 518d71c74c8..3a4bd354bf9 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -2874,6 +2874,15 @@ asm_clobber_reg_is_valid (int regno, int nregs, const char *regname) error ("PIC register clobbered by %qs in %<asm%>", regname); is_valid = false; } + else if (!in_hard_reg_set_p + (accessible_reg_set, reg_raw_mode[regno], regno)) + { + /* ??? Diagnose during gimplification? */ + error ("the register %qs cannot be clobbered in %<asm%>" + " for the current target", regname); + is_valid = false; + } + /* Clobbering the stack pointer register is deprecated. GCC expects the value of the stack pointer after an asm statement to be the same as it was before, so no asm can validly clobber the stack pointer in |