44 lines
963 B
LLVM
44 lines
963 B
LLVM
; RUN: opt -loop-reduce -S < %s | FileCheck %s
|
|
;
|
|
; Test LSR's use of SplitCriticalEdge during phi rewriting.
|
|
; Verify that identical edges are merged. rdar://problem/6453893
|
|
|
|
target triple = "x86-apple-darwin"
|
|
|
|
; CHECK: @test
|
|
; CHECK: bb89:
|
|
; CHECK: phi i8* [ %lsr.iv.next1, %bbA.bb89_crit_edge ], [ %lsr.iv.next1, %bbB.bb89_crit_edge ]{{$}}
|
|
|
|
define i8* @test() {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%rec = phi i32 [ %next, %loop ], [ 0, %entry ]
|
|
%next = add i32 %rec, 1
|
|
%tmp75 = getelementptr i8* null, i32 %next
|
|
br i1 false, label %loop, label %loopexit
|
|
|
|
loopexit:
|
|
br i1 false, label %bbA, label %bbB
|
|
|
|
bbA:
|
|
switch i32 0, label %bb89 [
|
|
i32 47, label %bb89
|
|
i32 58, label %bb89
|
|
]
|
|
|
|
bbB:
|
|
switch i8 0, label %bb89 [
|
|
i8 47, label %bb89
|
|
i8 58, label %bb89
|
|
]
|
|
|
|
bb89:
|
|
%tmp75phi = phi i8* [ %tmp75, %bbA ], [ %tmp75, %bbA ], [ %tmp75, %bbA ], [ %tmp75, %bbB ], [ %tmp75, %bbB ], [ %tmp75, %bbB ]
|
|
br label %exit
|
|
|
|
exit:
|
|
ret i8* %tmp75phi
|
|
}
|