derek.holloway
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121 lines
2.4 KiB
LLVM
121 lines
2.4 KiB
LLVM
; RUN: opt -passes=licm < %s -S | FileCheck %s
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; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<target-ir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' < %s -S | FileCheck %s
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define void @test1(i64 %n) {
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; CHECK-LABEL: @test1
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; CHECK: fence
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; CHECK-LABEL: loop:
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entry:
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br label %loop
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loop:
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%iv = phi i64 [0, %entry], [%iv.next, %loop]
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fence release
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%iv.next = add i64 %iv, 1
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%test = icmp slt i64 %iv, %n
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br i1 %test, label %loop, label %exit
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exit:
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ret void
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}
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define void @test2(i64 %n) {
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; CHECK-LABEL: @test2
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; CHECK: fence
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; CHECK-LABEL: loop:
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entry:
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br label %loop
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loop:
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%iv = phi i64 [0, %entry], [%iv.next, %loop]
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fence acquire
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%iv.next = add i64 %iv, 1
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%test = icmp slt i64 %iv, %n
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br i1 %test, label %loop, label %exit
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exit:
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ret void
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}
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define void @test3(i64 %n) {
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; CHECK-LABEL: @test3
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; CHECK: fence
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; CHECK-LABEL: loop:
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entry:
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br label %loop
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loop:
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%iv = phi i64 [0, %entry], [%iv.next, %loop]
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fence acq_rel
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%iv.next = add i64 %iv, 1
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%test = icmp slt i64 %iv, %n
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br i1 %test, label %loop, label %exit
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exit:
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ret void
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}
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define void @test4(i64 %n) {
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; CHECK-LABEL: @test4
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; CHECK: fence
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; CHECK-LABEL: loop:
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entry:
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br label %loop
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loop:
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%iv = phi i64 [0, %entry], [%iv.next, %loop]
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fence seq_cst
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%iv.next = add i64 %iv, 1
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%test = icmp slt i64 %iv, %n
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br i1 %test, label %loop, label %exit
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exit:
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ret void
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}
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define void @testneg1(i64 %n, ptr %p) {
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; CHECK-LABEL: @testneg1
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; CHECK-LABEL: loop:
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; CHECK: fence
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entry:
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br label %loop
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loop:
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%iv = phi i64 [0, %entry], [%iv.next, %loop]
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store i64 %iv, ptr %p
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fence release
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%iv.next = add i64 %iv, 1
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%test = icmp slt i64 %iv, %n
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br i1 %test, label %loop, label %exit
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exit:
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ret void
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}
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define void @testneg2(ptr %p) {
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; CHECK-LABEL: @testneg2
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; CHECK-LABEL: loop:
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; CHECK: fence
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entry:
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br label %loop
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loop:
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%iv = phi i64 [0, %entry], [%iv.next, %loop]
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fence acquire
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%n = load i64, ptr %p
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%iv.next = add i64 %iv, 1
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%test = icmp slt i64 %iv, %n
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br i1 %test, label %loop, label %exit
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exit:
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ret void
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}
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; Note: While a false negative for LICM on it's own, O3 does get this
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; case by combining the fences.
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define void @testfn1(i64 %n, ptr %p) {
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; CHECK-LABEL: @testfn1
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; CHECK-LABEL: loop:
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; CHECK: fence
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entry:
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br label %loop
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loop:
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%iv = phi i64 [0, %entry], [%iv.next, %loop]
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fence release
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fence release
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%iv.next = add i64 %iv, 1
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%test = icmp slt i64 %iv, %n
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br i1 %test, label %loop, label %exit
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exit:
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ret void
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}
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