derek.holloway
7502bf64a4
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48 lines
1.3 KiB
LLVM
48 lines
1.3 KiB
LLVM
; RUN: llc -mtriple=hexagon -pass-remarks=hwloops -pass-remarks-missed=hwloops \
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; RUN: %s -o /dev/null 2>&1 | FileCheck %s
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;; Test that HexagonHardwareLoops emits optimization remarks.
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;; -- Success: converted loop to hardware loop --
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; CHECK: remark: {{.*}} converted loop to hardware loop
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define void @test_hwloop(ptr nocapture %a, 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 ], [ %inc, %for.body ]
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%arrayidx = getelementptr inbounds i32, ptr %a, i32 %i
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store i32 %i, ptr %arrayidx, align 4
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%inc = add nuw nsw i32 %i, 1
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%exitcond = icmp eq i32 %inc, %n
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br i1 %exitcond, 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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;; -- Missed: loop contains a call --
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; CHECK: remark: {{.*}} loop contains an instruction that prevents hardware loop generation
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declare void @bar()
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define void @test_call_in_loop(ptr nocapture %a, 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 ], [ %inc, %for.body ]
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%arrayidx = getelementptr inbounds i32, ptr %a, i32 %i
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store i32 %i, ptr %arrayidx, align 4
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call void @bar()
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%inc = add nuw nsw i32 %i, 1
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%exitcond = icmp eq i32 %inc, %n
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br i1 %exitcond, 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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