derek.holloway
7502bf64a4
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84 lines
3.3 KiB
LLVM
84 lines
3.3 KiB
LLVM
; RUN: opt -mtriple=hexagon-- -mcpu=hexagonv68 -mattr=+hvxv68,+hvx-length128b \
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; RUN: -passes='loop(hexagon-vlcr)' -S \
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; RUN: -pass-remarks=hexagon-vlcr -pass-remarks-missed=hexagon-vlcr \
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; RUN: %s -o /dev/null 2>&1 | FileCheck %s
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;; Test that HexagonVectorLoopCarriedReuse emits optimization remarks.
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;; -- Success: reused loop-carried vector value --
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; CHECK: remark: {{.*}} reused loop-carried vector value
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@W = external local_unnamed_addr global i32, align 4
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define void @test_reuse(ptr noalias nocapture readonly %src, ptr noalias nocapture %dst, i32 %stride) {
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entry:
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%add.ptr = getelementptr inbounds i8, ptr %src, i32 %stride
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%0 = load i32, ptr @W, align 4
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%cmp = icmp sgt i32 %0, 0
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br i1 %cmp, label %for.body.preheader, label %for.end
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for.body.preheader:
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%1 = load <32 x i32>, ptr %add.ptr, align 128
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%incdec.ptr1 = getelementptr inbounds i8, ptr %add.ptr, i32 128
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%2 = load <32 x i32>, ptr %src, align 128
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%incdec.ptr = getelementptr inbounds i8, ptr %src, i32 128
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br label %for.body
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for.body:
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%out.phi = phi ptr [ %dst, %for.body.preheader ], [ %out.inc, %for.body ]
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%p1.phi = phi ptr [ %incdec.ptr1, %for.body.preheader ], [ %p1.inc, %for.body ]
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%p0.phi = phi ptr [ %incdec.ptr, %for.body.preheader ], [ %p0.inc, %for.body ]
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%i.phi = phi i32 [ 0, %for.body.preheader ], [ %i.inc, %for.body ]
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%a.phi = phi <32 x i32> [ %2, %for.body.preheader ], [ %3, %for.body ]
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%b.phi = phi <32 x i32> [ %1, %for.body.preheader ], [ %4, %for.body ]
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%p0.inc = getelementptr inbounds <32 x i32>, ptr %p0.phi, i32 1
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%3 = load <32 x i32>, ptr %p0.phi, align 128
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%p1.inc = getelementptr inbounds <32 x i32>, ptr %p1.phi, i32 1
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%4 = load <32 x i32>, ptr %p1.phi, align 128
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%max1 = tail call <32 x i32> @llvm.hexagon.V6.vmaxub.128B(<32 x i32> %a.phi, <32 x i32> %b.phi)
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%max2 = tail call <32 x i32> @llvm.hexagon.V6.vmaxub.128B(<32 x i32> %3, <32 x i32> %4)
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%sum = tail call <32 x i32> @llvm.hexagon.V6.vaddw.128B(<32 x i32> %max1, <32 x i32> %max2)
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store <32 x i32> %sum, ptr %out.phi, align 128
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%out.inc = getelementptr inbounds <32 x i32>, ptr %out.phi, i32 1
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%i.inc = add nuw nsw i32 %i.phi, 1
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%exitcond = icmp slt i32 %i.inc, %0
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br i1 %exitcond, label %for.body, label %for.end
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for.end:
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ret void
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}
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;; -- Missed: loop has multiple basic blocks --
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; CHECK: remark: {{.*}} loop has multiple basic blocks
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define void @test_multi_bb(ptr noalias nocapture readonly %src, ptr noalias nocapture %dst, i32 %n) {
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entry:
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%cmp = icmp sgt i32 %n, 0
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br i1 %cmp, label %for.body, label %for.end
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for.body:
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%i = phi i32 [ 0, %entry ], [ %i.inc, %for.latch ]
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%p = phi ptr [ %src, %entry ], [ %p.inc, %for.latch ]
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%q = phi ptr [ %dst, %entry ], [ %q.inc, %for.latch ]
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%val = load <32 x i32>, ptr %p, align 128
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%check = icmp eq i32 %i, 0
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br i1 %check, label %if.then, label %for.latch
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if.then:
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store <32 x i32> %val, ptr %q, align 128
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br label %for.latch
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for.latch:
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%p.inc = getelementptr inbounds <32 x i32>, ptr %p, i32 1
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%q.inc = getelementptr inbounds <32 x i32>, ptr %q, i32 1
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%i.inc = add nuw nsw i32 %i, 1
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%exitcond = icmp ne i32 %i.inc, %n
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br i1 %exitcond, label %for.body, label %for.end
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for.end:
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ret void
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}
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declare <32 x i32> @llvm.hexagon.V6.vmaxub.128B(<32 x i32>, <32 x i32>)
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declare <32 x i32> @llvm.hexagon.V6.vaddw.128B(<32 x i32>, <32 x i32>)
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