diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 9 |
1 files changed, 7 insertions, 2 deletions
@@ -214,6 +214,7 @@ init_expr_once () enum machine_mode mode; int num_clobbers; rtx mem, mem1; + rtx reg; /* Try indexing by frame ptr and try by stack ptr. It is known that on the Convex the stack ptr isn't a valid index. @@ -221,6 +222,10 @@ init_expr_once () mem = gen_rtx_MEM (VOIDmode, stack_pointer_rtx); mem1 = gen_rtx_MEM (VOIDmode, frame_pointer_rtx); + /* A scratch register we can modify in-place below to avoid + useless RTL allocations. */ + reg = gen_rtx_REG (VOIDmode, -1); + insn = rtx_alloc (INSN); pat = gen_rtx_SET (0, NULL_RTX, NULL_RTX); PATTERN (insn) = pat; @@ -229,11 +234,11 @@ init_expr_once () mode = (enum machine_mode) ((int) mode + 1)) { int regno; - rtx reg; direct_load[(int) mode] = direct_store[(int) mode] = 0; PUT_MODE (mem, mode); PUT_MODE (mem1, mode); + PUT_MODE (reg, mode); /* See if there is some register that can be used in this mode and directly loaded or stored from memory. */ @@ -246,7 +251,7 @@ init_expr_once () if (! HARD_REGNO_MODE_OK (regno, mode)) continue; - reg = gen_rtx_REG (mode, regno); + REGNO (reg) = regno; SET_SRC (pat) = mem; SET_DEST (pat) = reg; |