PR21582.ll
1.33 KB
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; RUN: opt < %s -basicaa -licm -S | FileCheck %s
@b = external global i32, align 4
@fn3.i = external global i32, align 4
declare i32 @g() nounwind
define i32 @f() {
entry:
br label %for.cond
for.cond: ; preds = %for.end, %entry
; CHECK-LABEL: for.cond:
; CHECK: store i32 0, i32* @b
store i32 0, i32* @b, align 4
br i1 true, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %for.cond
br label %for.body
for.body: ; preds = %for.body, %for.body.preheader
%g.15 = phi i32 [ undef, %for.body ], [ 0, %for.body.preheader ]
%arrayidx2 = getelementptr inbounds i32, i32* @fn3.i, i64 0
%0 = load i32, i32* %arrayidx2, align 4
%call = call i32 @g()
br i1 false, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %for.cond
%whatever = phi i32 [ %call, %for.end.loopexit ], [ undef, %for.cond ]
br i1 false, label %for.cond, label %if.then
if.then: ; preds = %for.end
; CHECK-LABEL: if.then:
; CHECK: phi i32 [ {{.*}}, %for.end ]
; CHECK-NOT: store i32 0, i32* @b
; CHECK: ret i32
ret i32 %whatever
}