b7322e8ac7
For Hexagon, peeling loops with small runtime trip count is beneficial for our benchmarks. We set PeelCount in HexagonTargetInfo.cpp and we use PeelCount set by the target for computing the desired peel count. Differential Revision: https://reviews.llvm.org/D44880 llvm-svn: 329042
38 lines
1.4 KiB
LLVM
38 lines
1.4 KiB
LLVM
; RUN: opt -loop-unroll -mtriple=hexagon -S < %s | FileCheck %s
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; Check that the loop is peeled twice for Hexagon.
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; CHECK: while.body.peel
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; CHECK: while.body.peel2
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%struct.STREAM = type { %union.anon, i32, i32 }
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%union.anon = type { i32* }
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define void @function(%struct.STREAM* nocapture readonly %b) local_unnamed_addr {
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entry:
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%bitPtr3 = getelementptr inbounds %struct.STREAM, %struct.STREAM* %b, i32 0, i32 2
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%0 = load i32, i32* %bitPtr3, align 4
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%cmp11 = icmp ult i32 %0, 32
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br i1 %cmp11, label %while.body.preheader, label %do.end
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while.body.preheader:
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%value2 = getelementptr inbounds %struct.STREAM, %struct.STREAM* %b, i32 0, i32 1
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%1 = load i32, i32* %value2, align 4
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%w = getelementptr inbounds %struct.STREAM, %struct.STREAM* %b, i32 0, i32 0, i32 0
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%2 = load i32*, i32** %w, align 4
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br label %while.body
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while.body:
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%bitPtr.014 = phi i32 [ %add, %while.body ], [ %0, %while.body.preheader ]
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%value.013 = phi i32 [ %shl, %while.body ], [ %1, %while.body.preheader ]
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%ptr.012 = phi i32* [ %incdec.ptr, %while.body ], [ %2, %while.body.preheader ]
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%add = add nuw i32 %bitPtr.014, 8
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%shr = lshr i32 %value.013, 24
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%incdec.ptr = getelementptr inbounds i32, i32* %ptr.012, i32 1
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store i32 %shr, i32* %ptr.012, align 4
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%shl = shl i32 %value.013, 8
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%cmp = icmp ult i32 %add, 17
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br i1 %cmp, label %while.body, label %do.end
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do.end:
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ret void
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}
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