forked from OSchip/llvm-project
33 lines
718 B
LLVM
33 lines
718 B
LLVM
; RUN: opt -S -loop-rotate < %s | FileCheck %s
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; RUN: opt -S -loop-rotate -enable-mssa-loop-dependency=true -verify-memoryssa < %s | FileCheck %s
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@e = global i32 10
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declare void @f1(i32) convergent
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declare void @f2(i32)
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; The call to f1 in the loop header shouldn't be duplicated (meaning, loop
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; rotation shouldn't occur), because f1 is convergent.
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; CHECK: call void @f1
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; CHECK-NOT: call void @f1
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define void @test(i32 %x) {
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entry:
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br label %loop
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loop:
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%n.phi = phi i32 [ %n, %loop.fin ], [ 0, %entry ]
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call void @f1(i32 %n.phi)
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%cond = icmp eq i32 %n.phi, %x
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br i1 %cond, label %exit, label %loop.fin
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loop.fin:
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%n = add i32 %n.phi, 1
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call void @f2(i32 %n)
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br label %loop
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exit:
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ret void
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}
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