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| author | Uros Bizjak <uros@gcc.gnu.org> | 2017-07-23 12:28:26 +0200 |
|---|---|---|
| committer | Uros Bizjak <uros@gcc.gnu.org> | 2017-07-23 12:28:26 +0200 |
| commit | f36dda3b640088390c182eae1a44f07d1041eb27 (patch) | |
| tree | d3edad4ade9231b06e6ec6b2f60db020220c4d08 /gcc/config | |
| parent | 4a15d84228ee29d55cd011094f82c8d4fa9a5a76 (diff) | |
| download | gcc-f36dda3b640088390c182eae1a44f07d1041eb27.zip gcc-f36dda3b640088390c182eae1a44f07d1041eb27.tar.gz gcc-f36dda3b640088390c182eae1a44f07d1041eb27.tar.bz2 | |
re PR target/80569 (i686: "shrx" instruction generated in 16-bit mode)
PR target/80569
* config/i386/i386.c (ix86_option_override_internal): Disable
BMI, BMI2 and TBM instructions for -m16.
testsuite/ChangeLog:
PR target/80569
* gcc.target/i386/pr80569.c: New test.
From-SVN: r250459
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/i386/i386.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index ca29135..b7ef554 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -6284,6 +6284,12 @@ ix86_option_override_internal (bool main_args_p, opts->x_ix86_isa_flags |= OPTION_MASK_ISA_LZCNT & ~opts->x_ix86_isa_flags_explicit; + /* Disable BMI, BMI2 and TBM instructions for -m16. */ + if (TARGET_16BIT_P(opts->x_ix86_isa_flags)) + opts->x_ix86_isa_flags + &= ~((OPTION_MASK_ISA_BMI | OPTION_MASK_ISA_BMI2 | OPTION_MASK_ISA_TBM) + & ~opts->x_ix86_isa_flags_explicit); + /* Validate -mpreferred-stack-boundary= value or default it to PREFERRED_STACK_BOUNDARY_DEFAULT. */ ix86_preferred_stack_boundary = PREFERRED_STACK_BOUNDARY_DEFAULT; |