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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42548 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2007-10-02 21:01:16 +00:00
parent 8d1c8ce3d8
commit 6dbb1b59ae
1 changed files with 16 additions and 0 deletions
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16
lib/Target/X86/README-SSE.txt
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@@ -673,6 +673,22 @@ beneficial because it prevents the load from being folded into the multiply.
In this loop: In this loop:
bb49: ; preds = %bb49, %bb49.preheader
%indvar = phi i32 [ 0, %bb49.preheader ], [ %indvar.next, %bb49 ] ; <i32> [#uses=2]
%dp.089.0.rec = shl i32 %indvar, 3 ; <i32> [#uses=2]
%dp.089.0 = getelementptr i32* %tmp89, i32 %dp.089.0.rec ; <i32*> [#uses=1]
%tmp5051 = bitcast i32* %dp.089.0 to <2 x i64>* ; <<2 x i64>*> [#uses=1]
store <2 x i64> zeroinitializer, <2 x i64>* %tmp5051, align 16
%dp.089.0.sum105 = or i32 %dp.089.0.rec, 4 ; <i32> [#uses=1]
%tmp56 = getelementptr i32* %tmp89, i32 %dp.089.0.sum105 ; <i32*> [#uses=1]
%tmp5657 = bitcast i32* %tmp56 to <2 x i64>* ; <<2 x i64>*> [#uses=1]
store <2 x i64> zeroinitializer, <2 x i64>* %tmp5657, align 16
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, %tmp98 ; <i1> [#uses=1]
br i1 %exitcond, label %bb72, label %bb49
we get:
LBB4_6: # bb47.preheader LBB4_6: # bb47.preheader
shlw $2, %si shlw $2, %si
decw %si decw %si