mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
438b583dbd
auto-update the DominatorTree because it doesn't keep the DominatorTree current while it works. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85670 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
667 B
LLVM
23 lines
667 B
LLVM
; Test merging of blocks that only have PHI nodes in them
|
|
;
|
|
; RUN: opt < %s -simplifycfg -S | not grep N:
|
|
;
|
|
|
|
define i32 @test(i1 %a, i1 %b) {
|
|
; <label>:0
|
|
br i1 %a, label %M, label %O
|
|
O: ; preds = %0
|
|
br i1 %b, label %N, label %Q
|
|
Q: ; preds = %O
|
|
br label %N
|
|
N: ; preds = %Q, %O
|
|
; This block should be foldable into M
|
|
%Wp = phi i32 [ 0, %O ], [ 1, %Q ] ; <i32> [#uses=1]
|
|
br label %M
|
|
M: ; preds = %N, %0
|
|
%W = phi i32 [ %Wp, %N ], [ 2, %0 ] ; <i32> [#uses=1]
|
|
%R = add i32 %W, 1 ; <i32> [#uses=1]
|
|
ret i32 %R
|
|
}
|
|
|