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