2596da3174
Have BasicTTI call the base implementation so that both agree on the default behaviour, which the default being a cost of '1'. This has required an X86 specific implementation as it seems to be very reliant on those instructions being free. Changes are also made to AMDGPU so that their implementations distinguish between cost kinds, so that the unrolling isn't affected. PowerPC also has its own implementation to prevent changes to the reg-usage vectorizer test. The cost model test changes now reflect that ret instructions are not generally free. Differential Revision: https://reviews.llvm.org/D79164
39 lines
1.4 KiB
LLVM
39 lines
1.4 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -mtriple=s390x-unknown-linux -mcpu=z13 -loop-vectorize \
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; RUN: -force-vector-width=2 -debug-only=loop-vectorize \
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; RUN: -disable-output < %s 2>&1 | FileCheck %s
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; Check costs for branches inside a vectorized loop around predicated
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; blocks. Each such branch will be guarded with an extractelement from the
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; vector compare plus a test under mask instruction. This cost is modelled on
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; the extractelement of i1.
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define void @fun(i32* %arr, i64 %trip.count) {
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entry:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %arr, i64 %indvars.iv
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%l = load i32, i32* %arrayidx, align 4
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%cmp55 = icmp sgt i32 %l, 0
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br i1 %cmp55, label %if.then, label %for.inc
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if.then:
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%sub = sub nsw i32 0, %l
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store i32 %sub, i32* %arrayidx, align 4
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br label %for.inc
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for.inc:
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, %trip.count
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br i1 %exitcond, label %for.end.loopexit, label %for.body
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for.end.loopexit:
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ret void
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; CHECK: LV: Found an estimated cost of 7 for VF 2 For instruction: br i1 %cmp55, label %if.then, label %for.inc
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; CHECK: LV: Found an estimated cost of 0 for VF 2 For instruction: br label %for.inc
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; CHECK: LV: Found an estimated cost of 1 for VF 2 For instruction: br i1 %exitcond, label %for.end.loopexit, label %for.body
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}
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