forked from OSchip/llvm-project
73 lines
1.7 KiB
LLVM
73 lines
1.7 KiB
LLVM
; RUN: opt < %s -basicaa -licm -S | FileCheck %s
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; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,loop(licm)' -S %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Make sure we don't hoist the store out of the loop; %a would
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; have the wrong value if f() unwinds
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define void @test1(i32* nocapture noalias %a, i1 zeroext %y) uwtable {
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entry:
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br label %for.body
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for.body:
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%i.03 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%0 = load i32, i32* %a, align 4
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%add = add nsw i32 %0, 1
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store i32 %add, i32* %a, align 4
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br i1 %y, label %if.then, label %for.inc
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; CHECK: define void @test1
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; CHECK: load i32, i32*
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; CHECK-NEXT: add
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; CHECK-NEXT: store i32
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if.then:
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tail call void @f()
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br label %for.inc
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for.inc:
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%inc = add nuw nsw i32 %i.03, 1
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%exitcond = icmp eq i32 %inc, 10000
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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for.cond.cleanup:
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ret void
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}
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; We can hoist the store out of the loop here; if f() unwinds,
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; the lifetime of %a ends.
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define void @test2(i1 zeroext %y) uwtable {
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entry:
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%a = alloca i32
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br label %for.body
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for.body:
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%i.03 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%0 = load i32, i32* %a, align 4
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%add = add nsw i32 %0, 1
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store i32 %add, i32* %a, align 4
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br i1 %y, label %if.then, label %for.inc
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if.then:
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tail call void @f()
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br label %for.inc
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for.inc:
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%inc = add nuw nsw i32 %i.03, 1
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%exitcond = icmp eq i32 %inc, 10000
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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for.cond.cleanup:
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ret void
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; CHECK: define void @test2
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; CHECK: store i32
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; CHECK-NEXT: ret void
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ret void
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}
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declare void @f() uwtable
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