85 lines
3.8 KiB
LLVM
85 lines
3.8 KiB
LLVM
; 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 -gvn-hoist -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
|
|
; FIXME: 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
|
|
; FIXME: store i64
|
|
store i64 %sub, i64* %p6, align 8
|
|
br label %if.end
|
|
|
|
; CHECK: if.end
|
|
if.end: ; preds = %if.else, %if.then
|
|
; FIXME: 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
|
|
}
|