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X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178459 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2013-04-01 10:23:49 +00:00
parent ef7964c1b7
commit 13497b3aa7
3 changed files with 106 additions and 9 deletions
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test/Transforms/LoopVectorize/X86/conversion-cost.ll
+4 -5
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@@ -33,11 +33,10 @@ define i32 @conversion_cost2(i32 %n, i8* nocapture %A, float* nocapture %B) noun
.lr.ph: ; preds = %0, %.lr.ph
%indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 9, %0 ]
%2 = add nsw i64 %indvars.iv, 3
%3 = trunc i64 %2 to i32
%4 = sitofp i32 %3 to float
%5 = getelementptr inbounds float* %B, i64 %indvars.iv
store float %4, float* %5, align 4
%add = add nsw i64 %indvars.iv, 3
%tofp = sitofp i64 %add to float
%gep = getelementptr inbounds float* %B, i64 %indvars.iv
store float %tofp, float* %gep, align 4
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %n