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| author | Chris Lattner <sabre@nondot.org> | 2006-03-23 21:28:44 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2006-03-23 21:28:44 +0000 |
| commit | 716aefcd910ae849ffb42d4149ac6aecc818c515 (patch) | |
| tree | ebfb0675dbf43e143463c39bf8a004b29552fab3 | |
| parent | 7692eb4201e2071fb2afddcdaa6ba93b5e6abad4 (diff) | |
add a note
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27000 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/PowerPC/README.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt index c9fba7fed4..5bdefaa23c 100644 --- a/lib/Target/PowerPC/README.txt +++ b/lib/Target/PowerPC/README.txt @@ -569,3 +569,13 @@ We could use a target dag combine to turn the lwz/extsw into an lwa when the lwz has a single use. Since LWA is cracked anyway, this would be a codesize win only. +===-------------------------------------------------------------------------=== + + Consider this: + v4f32 Vector; + v4f32 Vector2 = { Vector.X, Vector.X, Vector.X, Vector.X }; + +Since we know that "Vector" is 16-byte aligned and we know the element offset +of ".X", we should change the load into a lve*x instruction, instead of doing +a load/store/lve*x sequence. + |