diff options
Diffstat (limited to 'gcc/config/i386/i386.c')
| -rw-r--r-- | gcc/config/i386/i386.c | 49 |
1 files changed, 46 insertions, 3 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 999c7160a57..f6c4eb40e6c 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -12305,6 +12305,49 @@ ix86_pic_register_p (rtx x) return REG_P (x) && REGNO (x) == PIC_OFFSET_TABLE_REGNUM; } +/* Helper function for ix86_delegitimize_address. + Attempt to delegitimize TLS local-exec accesses. */ + +static rtx +ix86_delegitimize_tls_address (rtx orig_x) +{ + rtx x = orig_x, unspec; + struct ix86_address addr; + + if (!TARGET_TLS_DIRECT_SEG_REFS) + return orig_x; + if (MEM_P (x)) + x = XEXP (x, 0); + if (GET_CODE (x) != PLUS || GET_MODE (x) != Pmode) + return orig_x; + if (ix86_decompose_address (x, &addr) == 0 + || addr.seg != (TARGET_64BIT ? SEG_FS : SEG_GS) + || addr.disp == NULL_RTX + || GET_CODE (addr.disp) != CONST) + return orig_x; + unspec = XEXP (addr.disp, 0); + if (GET_CODE (unspec) == PLUS && CONST_INT_P (XEXP (unspec, 1))) + unspec = XEXP (unspec, 0); + if (GET_CODE (unspec) != UNSPEC || XINT (unspec, 1) != UNSPEC_NTPOFF) + return orig_x; + x = XVECEXP (unspec, 0, 0); + gcc_assert (GET_CODE (x) == SYMBOL_REF); + if (unspec != XEXP (addr.disp, 0)) + x = gen_rtx_PLUS (Pmode, x, XEXP (XEXP (addr.disp, 0), 1)); + if (addr.index) + { + rtx idx = addr.index; + if (addr.scale != 1) + idx = gen_rtx_MULT (Pmode, idx, GEN_INT (addr.scale)); + x = gen_rtx_PLUS (Pmode, idx, x); + } + if (addr.base) + x = gen_rtx_PLUS (Pmode, addr.base, x); + if (MEM_P (orig_x)) + x = replace_equiv_address_nv (orig_x, x); + return x; +} + /* In the name of slightly smaller debug output, and to cater to general assembler lossage, recognize PIC+GOTOFF and turn it back into a direct symbol reference. @@ -12340,7 +12383,7 @@ ix86_delegitimize_address (rtx x) || GET_CODE (XEXP (x, 0)) != UNSPEC || XINT (XEXP (x, 0), 1) != UNSPEC_GOTPCREL || !MEM_P (orig_x)) - return orig_x; + return ix86_delegitimize_tls_address (orig_x); x = XVECEXP (XEXP (x, 0), 0, 0); if (GET_MODE (orig_x) != Pmode) return simplify_gen_subreg (GET_MODE (orig_x), x, Pmode, 0); @@ -12349,7 +12392,7 @@ ix86_delegitimize_address (rtx x) if (GET_CODE (x) != PLUS || GET_CODE (XEXP (x, 1)) != CONST) - return orig_x; + return ix86_delegitimize_tls_address (orig_x); if (ix86_pic_register_p (XEXP (x, 0))) /* %ebx + GOT/GOTOFF */ @@ -12389,7 +12432,7 @@ ix86_delegitimize_address (rtx x) result = XVECEXP (x, 0, 0); if (! result) - return orig_x; + return ix86_delegitimize_tls_address (orig_x); if (const_addend) result = gen_rtx_CONST (Pmode, gen_rtx_PLUS (Pmode, result, const_addend)); |