derek.holloway
7502bf64a4
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85 lines
2.5 KiB
LLVM
85 lines
2.5 KiB
LLVM
; RUN: opt -p hexagon-loop-idiom -S -mtriple hexagon-unknown-elf \
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; RUN: -pass-remarks=hexagon-lir -pass-remarks-missed=hexagon-lir \
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; RUN: %s -o /dev/null 2>&1 | FileCheck %s
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;; Test that HexagonLoopIdiomRecognition emits optimization remarks.
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;; -- Success: loop converted to memmove --
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; CHECK: remark: {{.*}} converted loop to memmove
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define void @test_memmove(ptr nocapture %A, ptr nocapture readonly %B, 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.preheader, label %for.end
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for.body.preheader:
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br label %for.body
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for.body:
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%src.phi = phi ptr [ %B, %for.body.preheader ], [ %src.inc, %for.body ]
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%dst.phi = phi ptr [ %A, %for.body.preheader ], [ %dst.inc, %for.body ]
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%i = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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%val = load i32, ptr %src.phi, align 4
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store i32 %val, ptr %dst.phi, align 4
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%inc = add nuw nsw i32 %i, 1
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%exitcond = icmp ne i32 %inc, %n
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%src.inc = getelementptr i32, ptr %src.phi, i32 1
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%dst.inc = getelementptr i32, ptr %dst.phi, i32 1
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit:
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br label %for.end
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for.end:
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ret void
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}
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;; -- Missed: store value is not a simple load --
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; CHECK: remark: {{.*}} store value is not a simple load
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define void @test_no_load(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.preheader, label %for.end
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for.body.preheader:
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br label %for.body
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for.body:
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%dst.phi = phi ptr [ %A, %for.body.preheader ], [ %dst.inc, %for.body ]
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%i = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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store i32 42, ptr %dst.phi, align 4
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%inc = add nuw nsw i32 %i, 1
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%exitcond = icmp ne i32 %inc, %n
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%dst.inc = getelementptr i32, ptr %dst.phi, i32 1
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit:
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br label %for.end
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for.end:
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ret void
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}
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;; -- Missed: non-countable loop --
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; CHECK: remark: {{.*}} backedge-taken count is not loop-invariant
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define void @test_non_countable(ptr nocapture %A, ptr nocapture readonly %B,
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ptr nocapture readonly %cond) {
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entry:
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br label %for.body
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for.body:
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%src.phi = phi ptr [ %B, %entry ], [ %src.inc, %for.body ]
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%dst.phi = phi ptr [ %A, %entry ], [ %dst.inc, %for.body ]
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%val = load i32, ptr %src.phi, align 4
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store i32 %val, ptr %dst.phi, align 4
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%src.inc = getelementptr i32, ptr %src.phi, i32 1
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%dst.inc = getelementptr i32, ptr %dst.phi, i32 1
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%flag = load volatile i1, ptr %cond, align 1
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br i1 %flag, 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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