diff options
Diffstat (limited to 'gcc/config/i386/i386.c')
| -rw-r--r-- | gcc/config/i386/i386.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 31a691ff38b..0f140c8adf7 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -2764,6 +2764,12 @@ override_options (void) can be optimized to ap = __builtin_next_arg (0). */ if (!TARGET_64BIT || TARGET_64BIT_MS_ABI) targetm.expand_builtin_va_start = NULL; + +#ifdef USE_IX86_CLD + /* Use -mcld by default for 32-bit code if configured with --enable-cld. */ + if (!TARGET_64BIT) + target_flags |= MASK_CLD & ~target_flags_explicit; +#endif } /* Return true if this goes in large data/bss. */ @@ -6597,6 +6603,10 @@ ix86_expand_prologue (void) emit_insn (gen_prologue_use (pic_offset_table_rtx)); emit_insn (gen_blockage ()); } + + /* Emit cld instruction if stringops are used in the function. */ + if (TARGET_CLD && ix86_current_function_needs_cld) + emit_insn (gen_cld ()); } /* Emit code to restore saved registers using MOV insns. First register |