derek.holloway
7502bf64a4
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49 lines
1.3 KiB
LLVM
49 lines
1.3 KiB
LLVM
; RUN: opt < %s -passes=loop-unroll -S | FileCheck %s
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; RUN: opt < %s -passes='require<opt-remark-emit>,loop-unroll' -S | FileCheck %s
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; This should not unroll since the address of the loop header is taken.
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; CHECK-LABEL: @test1(
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; CHECK: store ptr blockaddress(@test1, %l1), ptr %P
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; CHECK: l1:
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; CHECK-NEXT: phi i32
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; rdar://8287027
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define i32 @test1(ptr %P) nounwind ssp {
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entry:
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store ptr blockaddress(@test1, %l1), ptr %P
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br label %l1
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l1: ; preds = %l1, %entry
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%x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ]
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%inc = add nsw i32 %x.0, 1
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%exitcond = icmp eq i32 %inc, 3
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br i1 %exitcond, label %l2, label %l1
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l2: ; preds = %l1
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ret i32 0
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}
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; This should not unroll since the call is 'noduplicate'.
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; CHECK-LABEL: @test2(
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define i32 @test2(ptr %P) nounwind ssp {
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entry:
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br label %l1
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l1: ; preds = %l1, %entry
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%x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ]
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; CHECK: call void @f()
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; CHECK-NOT: call void @f()
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call void @f() noduplicate
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%inc = add nsw i32 %x.0, 1
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%exitcond = icmp eq i32 %inc, 3
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br i1 %exitcond, label %l2, label %l1
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l2: ; preds = %l1
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ret i32 0
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; CHECK: }
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}
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declare void @f()
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