pr45927.ll
2.59 KB
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; RUN: opt -disable-output -loop-simplify -lcssa -licm -print-memoryssa < %s -enable-new-pm=0 2>&1 | FileCheck %s
; RUN: opt -disable-output -aa-pipeline=basic-aa -passes='loop-mssa(licm),print<memoryssa>' < %s 2>&1 | FileCheck %s
@a = external dso_local global i16, align 1
@c = external dso_local global i16, align 1
; CHECK-LABEL: @main()
; CHECK: entry:
; CHECK-NEXT: %res.addr.i = alloca i16
; CHECK-NEXT: ; MemoryUse(liveOnEntry)
; CHECK-NEXT: %c.promoted = load i16, i16* @c
; CHECK-NEXT: br label %for.cond.i
; CHECK: for.cond.i:
; CHECK-NEXT: ; [[NO5:.*]] = MemoryPhi({entry,liveOnEntry},{f.exit.i,[[NO5]]})
; CHECK-NEXT: %inc.i1 = phi i16 [ %inc.i, %f.exit.i ], [ %c.promoted, %entry ]
; CHECK-NEXT: %inc.i = add nsw i16 %inc.i1, 1
; CHECK-NEXT: br i1 false, label %f.exit.thread.i, label %f.exit.i
; CHECK: f.exit.thread.i:
; CHECK-NEXT: %inc.i.lcssa = phi i16 [ %inc.i, %for.cond.i ]
; CHECK-NEXT: ; [[NO6:.*]] = MemoryDef([[NO5]])
; CHECK-NEXT: store i16 %inc.i.lcssa, i16* @c, align 1
; CHECK-NEXT: ; [[NO2:.*]] = MemoryDef([[NO6]])
; CHECK-NEXT: store i16 1, i16* @a, align 1
; CHECK-NEXT: ; MemoryUse([[NO2]])
; CHECK-NEXT: %tmp2 = load i16, i16* @c, align 1
; CHECK-NEXT: br label %g.exit
; CHECK: f.exit.i
; CHECK-NEXT: br i1 false, label %g.exit.loopexit, label %for.cond.i
; CHECK: g.exit.loopexit:
; CHECK-NEXT: %inc.i.lcssa2 = phi i16 [ %inc.i, %f.exit.i ]
; CHECK-NEXT: ; [[NO7:.*]] = MemoryDef([[NO5]])
; CHECK-NEXT: store i16 %inc.i.lcssa2, i16* @c, align 1
; CHECK-NEXT: br label %g.exit
; CHECK: g.exit
; CHECK-NEXT: ; [[NO4:.*]] = MemoryPhi({f.exit.thread.i,[[NO2]]},{g.exit.loopexit,[[NO7]]})
; CHECK-NEXT: ; MemoryUse([[NO4]])
; CHECK-NEXT: %tmp1 = load i16, i16* @c, align 1
; CHECK-NEXT: ; [[NO3:.*]] = MemoryDef([[NO4]])
; CHECK-NEXT: store i16 %tmp1, i16* %res.addr.i, align 1
; CHECK-NEXT: ret void
define dso_local void @main() {
entry:
%res.addr.i = alloca i16, align 1
br label %for.cond.i
for.cond.i: ; preds = %f.exit.i, %entry
%tmp0 = load i16, i16* @c, align 1
%inc.i = add nsw i16 %tmp0, 1
store i16 %inc.i, i16* @c, align 1
br i1 false, label %f.exit.thread.i, label %f.exit.i
f.exit.thread.i: ; preds = %for.cond.i
store i16 1, i16* @a, align 1
%tmp2 = load i16, i16* @c, align 1
br label %g.exit
f.exit.i: ; preds = %for.cond.i
br i1 false, label %g.exit, label %for.cond.i
g.exit: ; preds = %f.exit.i, %f.exit.thread.i
%tmp1 = load i16, i16* @c, align 1
store i16 %tmp1, i16* %res.addr.i, align 1
ret void
}