derek.holloway
7502bf64a4
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41 lines
1.2 KiB
LLVM
41 lines
1.2 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -passes=loop-vectorize -force-vector-width=2 -debug-only=loop-vectorize --disable-output -S -o - < %s 2>&1 | FileCheck %s
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%struct.foo = type { i32, i64 }
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; CHECK: Cost of 0 for VF 2: WIDEN-CAST ir<%0> = bitcast ir<%b> to ptr
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; The bitcast below will be scalarized due to the predication in the loop. Bitcasts
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; between pointer types should be treated as free, despite the scalarization.
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define void @foo(ptr noalias nocapture %in, ptr noalias nocapture readnone %out, i64 %n) {
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entry:
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br label %for.body
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for.body:
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%i.012 = phi i64 [ %inc, %if.end ], [ 0, %entry ]
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%b = getelementptr inbounds %struct.foo, ptr %in, i64 %i.012, i32 1
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%0 = bitcast ptr %b to ptr
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%a = getelementptr inbounds %struct.foo, ptr %in, i64 %i.012, i32 0
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%1 = load i32, ptr %a, align 8
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%tobool.not = icmp eq i32 %1, 0
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br i1 %tobool.not, label %if.end, label %land.lhs.true
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land.lhs.true:
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%2 = load i32, ptr %0, align 4
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%cmp2 = icmp sgt i32 %2, 0
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br i1 %cmp2, label %if.then, label %if.end
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if.then:
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%sub = add nsw i32 %2, -1
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store i32 %sub, ptr %0, align 4
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br label %if.end
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if.end:
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%inc = add nuw nsw i64 %i.012, 1
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%exitcond.not = icmp eq i64 %inc, %n
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br i1 %exitcond.not, label %for.end, label %for.body
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for.end:
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ret void
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}
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