diff options
| author | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-06-04 04:40:26 +0000 |
|---|---|---|
| committer | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-06-04 04:40:26 +0000 |
| commit | 1d37ed9887a8e72c1d2a9faf049d1bbadc749426 (patch) | |
| tree | 67b5d6858fb39427830d82a836947e99546454e9 /gcc/optabs.c | |
| parent | 5e8603b7b6936d6b2dc38729a31bf077ad0c9268 (diff) | |
| download | gcc-1d37ed9887a8e72c1d2a9faf049d1bbadc749426.tar.gz | |
* optabs.c (expand_binop): Attempt to reuse pseudos for duplicate
non-volatile operands of binary operations.
(prepare_cmp_insn): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@67417 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/optabs.c')
| -rw-r--r-- | gcc/optabs.c | 26 |
1 files changed, 22 insertions, 4 deletions
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 |