diff options
| author | Richard Henderson <rth@redhat.com> | 2011-01-12 09:56:15 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2011-01-12 09:56:15 -0800 |
| commit | 126b1483704fa2a2c1db26878467130b149e3fb8 (patch) | |
| tree | 1d25a059757a618d7e9bda7bdc570b24153f3ccb /gcc | |
| parent | f3d9d2e0600f84dec5608464c93f4f6f68649ee5 (diff) | |
| download | gcc-126b1483704fa2a2c1db26878467130b149e3fb8.zip gcc-126b1483704fa2a2c1db26878467130b149e3fb8.tar.gz gcc-126b1483704fa2a2c1db26878467130b149e3fb8.tar.bz2 | |
mn10300: Add delegitimize_address hook.
This suppresses warnings generated by the dwarf2 output
routines about uninterpretable addresses.
From-SVN: r168724
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/config/mn10300/mn10300.c | 62 |
2 files changed, 65 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 690b114..70c69e3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,8 @@ 2011-01-12 Richard Henderson <rth@redhat.com> + * config/mn10300/mn10300.c (mn10300_delegitimize_address): New. + (TARGET_DELEGITIMIZE_ADDRESS): New. + * config/mn10300/mn10300.md (UNSPEC_BSCH): New. (clzsi2, *bsch): New patterns. diff --git a/gcc/config/mn10300/mn10300.c b/gcc/config/mn10300/mn10300.c index 65e3444..1cea6c2 100644 --- a/gcc/config/mn10300/mn10300.c +++ b/gcc/config/mn10300/mn10300.c @@ -2038,6 +2038,66 @@ mn10300_legitimate_constant_p (rtx x) return true; } +/* Undo pic address legitimization for the benefit of debug info. */ + +static rtx +mn10300_delegitimize_address (rtx orig_x) +{ + rtx x = orig_x, ret, addend = NULL; + bool need_mem; + + if (MEM_P (x)) + x = XEXP (x, 0); + if (GET_CODE (x) != PLUS || GET_MODE (x) != Pmode) + return orig_x; + + if (XEXP (x, 0) == pic_offset_table_rtx) + ; + /* With the REG+REG addressing of AM33, var-tracking can re-assemble + some odd-looking "addresses" that were never valid in the first place. + We need to look harder to avoid warnings being emitted. */ + else if (GET_CODE (XEXP (x, 0)) == PLUS) + { + rtx x0 = XEXP (x, 0); + rtx x00 = XEXP (x0, 0); + rtx x01 = XEXP (x0, 1); + + if (x00 == pic_offset_table_rtx) + addend = x01; + else if (x01 == pic_offset_table_rtx) + addend = x00; + else + return orig_x; + + } + else + return orig_x; + x = XEXP (x, 1); + + if (GET_CODE (x) != CONST) + return orig_x; + x = XEXP (x, 0); + if (GET_CODE (x) != UNSPEC) + return orig_x; + + ret = XVECEXP (x, 0, 0); + if (XINT (x, 1) == UNSPEC_GOTOFF) + need_mem = false; + else if (XINT (x, 1) == UNSPEC_GOT) + need_mem = true; + else + return orig_x; + + gcc_assert (GET_CODE (ret) == SYMBOL_REF); + if (need_mem != MEM_P (orig_x)) + return orig_x; + if (need_mem && addend) + return orig_x; + if (addend) + ret = gen_rtx_PLUS (Pmode, addend, ret); + return ret; +} + /* For addresses, costs are relative to "MOV (Rm),Rn". For AM33 this is the 3-byte fully general instruction; for MN103 this is the 2-byte form with an address register. */ @@ -2722,6 +2782,8 @@ mn10300_conditional_register_usage (void) #undef TARGET_LEGITIMATE_ADDRESS_P #define TARGET_LEGITIMATE_ADDRESS_P mn10300_legitimate_address_p +#undef TARGET_DELEGITIMIZE_ADDRESS +#define TARGET_DELEGITIMIZE_ADDRESS mn10300_delegitimize_address #undef TARGET_PREFERRED_RELOAD_CLASS #define TARGET_PREFERRED_RELOAD_CLASS mn10300_preferred_reload_class |