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; Tests to make sure that loads and stores in a diamond get merged
; Loads are hoisted into the header. Stores sunks into the footer.
; RUN: opt -basicaa -memdep -mldst-motion -S < %s | FileCheck %s
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
%struct.node = type { i64, %struct.node*, %struct.node*, %struct.node*, i64, %struct.arc*, i64, i64, i64 }
%struct.arc = type { i64, i64, i64 }
define i64 @foo(%struct.node* nocapture readonly %r) nounwind {
entry:
%node.0.in16 = getelementptr inbounds %struct.node, %struct.node* %r, i64 0, i32 2
%node.017 = load %struct.node*, %struct.node** %node.0.in16, align 8
%tobool18 = icmp eq %struct.node* %node.017, null
br i1 %tobool18, label %while.end, label %while.body.preheader
; CHECK-LABEL: while.body.preheader
while.body.preheader: ; preds = %entry
; CHECK: load
br label %while.body
while.body: ; preds = %while.body.preheader, %if.end
%node.020 = phi %struct.node* [ %node.0, %if.end ], [ %node.017, %while.body.preheader ]
%sum.019 = phi i64 [ %inc, %if.end ], [ 0, %while.body.preheader ]
%orientation = getelementptr inbounds %struct.node, %struct.node* %node.020, i64 0, i32 4
%0 = load i64, i64* %orientation, align 8
%cmp = icmp eq i64 %0, 1
br i1 %cmp, label %if.then, label %if.else
; CHECK: if.then
if.then: ; preds = %while.body
%a = getelementptr inbounds %struct.node, %struct.node* %node.020, i64 0, i32 5
; CHECK-NOT: load %struct.arc
%1 = load %struct.arc*, %struct.arc** %a, align 8
%cost = getelementptr inbounds %struct.arc, %struct.arc* %1, i64 0, i32 0
; CHECK-NOT: load i64, i64*
%2 = load i64, i64* %cost, align 8
%pred = getelementptr inbounds %struct.node, %struct.node* %node.020, i64 0, i32 1
; CHECK-NOT: load %struct.node*, %struct.node**
%3 = load %struct.node*, %struct.node** %pred, align 8
%p = getelementptr inbounds %struct.node, %struct.node* %3, i64 0, i32 6
; CHECK-NOT: load i64, i64*
%4 = load i64, i64* %p, align 8
%add = add nsw i64 %4, %2
%p1 = getelementptr inbounds %struct.node, %struct.node* %node.020, i64 0, i32 6
; CHECK-NOT: store i64
store i64 %add, i64* %p1, align 8
br label %if.end
; CHECK: if.else
if.else: ; preds = %while.body
%pred2 = getelementptr inbounds %struct.node, %struct.node* %node.020, i64 0, i32 1
; CHECK-NOT: load %struct.node*, %struct.node**
%5 = load %struct.node*, %struct.node** %pred2, align 8
%p3 = getelementptr inbounds %struct.node, %struct.node* %5, i64 0, i32 6
; CHECK-NOT: load i64, i64*
%6 = load i64, i64* %p3, align 8
%a4 = getelementptr inbounds %struct.node, %struct.node* %node.020, i64 0, i32 5
; CHECK-NOT: load %struct.arc*, %struct.arc**
%7 = load %struct.arc*, %struct.arc** %a4, align 8
%cost5 = getelementptr inbounds %struct.arc, %struct.arc* %7, i64 0, i32 0
; CHECK-NOT: load i64, i64*
%8 = load i64, i64* %cost5, align 8
%sub = sub nsw i64 %6, %8
%p6 = getelementptr inbounds %struct.node, %struct.node* %node.020, i64 0, i32 6
; CHECK-NOT: store i64
store i64 %sub, i64* %p6, align 8
br label %if.end
; CHECK: if.end
if.end: ; preds = %if.else, %if.then
; CHECK: store
%inc = add nsw i64 %sum.019, 1
%node.0.in = getelementptr inbounds %struct.node, %struct.node* %node.020, i64 0, i32 2
%node.0 = load %struct.node*, %struct.node** %node.0.in, align 8
%tobool = icmp eq %struct.node* %node.0, null
br i1 %tobool, label %while.end.loopexit, label %while.body
while.end.loopexit: ; preds = %if.end
%inc.lcssa = phi i64 [ %inc, %if.end ]
br label %while.end
while.end: ; preds = %while.end.loopexit, %entry
%sum.0.lcssa = phi i64 [ 0, %entry ], [ %inc.lcssa, %while.end.loopexit ]
ret i64 %sum.0.lcssa
}
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