diff options
Diffstat (limited to 'gcc/cfgexpand.c')
| -rw-r--r-- | gcc/cfgexpand.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index 56ef71dfbab..e4ddb3aac9f 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -2674,15 +2674,40 @@ expand_asm_loc (tree string, int vol, location_t locus) { rtx body; - if (TREE_CODE (string) == ADDR_EXPR) - string = TREE_OPERAND (string, 0); - body = gen_rtx_ASM_INPUT_loc (VOIDmode, ggc_strdup (TREE_STRING_POINTER (string)), locus); MEM_VOLATILE_P (body) = vol; + /* Non-empty basic ASM implicitly clobbers memory. */ + if (TREE_STRING_LENGTH (string) != 0) + { + rtx asm_op, clob; + unsigned i, nclobbers; + auto_vec<rtx> input_rvec, output_rvec; + auto_vec<const char *> constraints; + auto_vec<rtx> clobber_rvec; + HARD_REG_SET clobbered_regs; + CLEAR_HARD_REG_SET (clobbered_regs); + + clob = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode)); + clobber_rvec.safe_push (clob); + + if (targetm.md_asm_adjust) + targetm.md_asm_adjust (output_rvec, input_rvec, + constraints, clobber_rvec, + clobbered_regs); + + asm_op = body; + nclobbers = clobber_rvec.length (); + body = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (1 + nclobbers)); + + XVECEXP (body, 0, 0) = asm_op; + for (i = 0; i < nclobbers; i++) + XVECEXP (body, 0, i + 1) = gen_rtx_CLOBBER (VOIDmode, clobber_rvec[i]); + } + emit_insn (body); } |