diff options
Diffstat (limited to 'gcc/stmt.c')
| -rw-r--r-- | gcc/stmt.c | 53 |
1 files changed, 33 insertions, 20 deletions
@@ -31,6 +31,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "tm.h" #include "rtl.h" +#include "hard-reg-set.h" #include "tree.h" #include "tm_p.h" #include "flags.h" @@ -39,7 +40,6 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "insn-config.h" #include "expr.h" #include "libfuncs.h" -#include "hard-reg-set.h" #include "recog.h" #include "machmode.h" #include "toplev.h" @@ -558,15 +558,12 @@ parse_input_constraint (const char **constraint_p, int input_num, return true; } -/* Check for overlap between registers marked in CLOBBERED_REGS and - anything inappropriate in DECL. Emit error and return TRUE for error, - FALSE for ok. */ +/* Return true iff there's an overlap between REGS and DECL, where DECL + can be an asm-declared register. */ -static bool -decl_conflicts_with_clobbers_p (tree decl, const HARD_REG_SET clobbered_regs) +bool +decl_overlaps_hard_reg_set_p (tree decl, const HARD_REG_SET regs) { - /* Conflicts between asm-declared register variables and the clobber - list are not allowed. */ if ((TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == PARM_DECL) && DECL_REGISTER (decl) && REG_P (DECL_RTL (decl)) @@ -579,18 +576,34 @@ decl_conflicts_with_clobbers_p (tree decl, const HARD_REG_SET clobbered_regs) regno < (REGNO (reg) + hard_regno_nregs[REGNO (reg)][GET_MODE (reg)]); regno++) - if (TEST_HARD_REG_BIT (clobbered_regs, regno)) - { - error ("asm-specifier for variable %qs conflicts with " - "asm clobber list", - IDENTIFIER_POINTER (DECL_NAME (decl))); - - /* Reset registerness to stop multiple errors emitted for a - single variable. */ - DECL_REGISTER (decl) = 0; - return true; - } + if (TEST_HARD_REG_BIT (regs, regno)) + return true; + } + + return false; +} + + +/* Check for overlap between registers marked in CLOBBERED_REGS and + anything inappropriate in DECL. Emit error and return TRUE for error, + FALSE for ok. */ + +static bool +decl_conflicts_with_clobbers_p (tree decl, const HARD_REG_SET clobbered_regs) +{ + /* Conflicts between asm-declared register variables and the clobber + list are not allowed. */ + if (decl_overlaps_hard_reg_set_p (decl, clobbered_regs)) + { + error ("asm-specifier for variable %qs conflicts with asm clobber list", + IDENTIFIER_POINTER (DECL_NAME (decl))); + + /* Reset registerness to stop multiple errors emitted for a single + variable. */ + DECL_REGISTER (decl) = 0; + return true; } + return false; } @@ -656,7 +669,7 @@ expand_asm_operands (tree string, tree outputs, tree inputs, Case in point is when the i386 backend moved from cc0 to a hard reg -- maintaining source-level compatibility means automatically clobbering the flags register. */ - clobbers = targetm.md_asm_clobbers (clobbers); + clobbers = targetm.md_asm_clobbers (outputs, inputs, clobbers); /* Count the number of meaningful clobbered registers, ignoring what we would ignore later. */ |