diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/optabs.c | 26 |
2 files changed, 28 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9b20061921e..034d6cc7767 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2003-06-03 Roger Sayle <roger@eyesopen.com> + * optabs.c (expand_binop): Attempt to reuse pseudos for duplicate + non-volatile operands of binary operations. + (prepare_cmp_insn): Likewise. + +2003-06-03 Roger Sayle <roger@eyesopen.com> + * varasm.c (force_const_mem): Handle alignment of constants not representable as a type in the front-end language. diff --git a/gcc/optabs.c b/gcc/optabs.c index b59f89ca8c0..171d13f2d6e 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -700,8 +700,17 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods) if (flag_force_mem) { - op0 = force_not_mem (op0); - op1 = force_not_mem (op1); + /* Load duplicate non-volatile operands once. */ + if (rtx_equal_p (op0, op1) && ! volatile_refs_p (op0)) + { + op0 = force_not_mem (op0); + op1 = op0; + } + else + { + op0 = force_not_mem (op0); + op1 = force_not_mem (op1); + } } /* If subtracting an integer constant, convert this into an addition of @@ -3587,8 +3596,17 @@ prepare_cmp_insn (px, py, pcomparison, size, pmode, punsignedp, purpose) if (mode != BLKmode && flag_force_mem) { - x = force_not_mem (x); - y = force_not_mem (y); + /* Load duplicate non-volatile operands once. */ + if (rtx_equal_p (x, y) && ! volatile_refs_p (x)) + { + x = force_not_mem (x); + y = x; + } + else + { + x = force_not_mem (x); + y = force_not_mem (y); + } } /* If we are inside an appropriately-short loop and one operand is an |