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