mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
35 lines
1.0 KiB
LLVM
35 lines
1.0 KiB
LLVM
; Test merging of blocks containing complex expressions,
|
|
; with various folding thresholds
|
|
;
|
|
; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=1 | grep N:
|
|
; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=2 | not grep N:
|
|
; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=2 | grep M:
|
|
; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=7 | not grep M:
|
|
;
|
|
|
|
define i32 @test(i1 %a, i1 %b, i32 %i, i32 %j, i32 %k) {
|
|
entry:
|
|
br i1 %a, label %M, label %O
|
|
O:
|
|
br i1 %b, label %P, label %Q
|
|
P:
|
|
%iaj = add i32 %i, %j
|
|
%iajak = add i32 %iaj, %k
|
|
br label %N
|
|
Q:
|
|
%ixj = xor i32 %i, %j
|
|
%ixjxk = xor i32 %ixj, %k
|
|
br label %N
|
|
N:
|
|
; This phi should be foldable if threshold >= 2
|
|
%Wp = phi i32 [ %iajak, %P ], [ %ixjxk, %Q ]
|
|
%Wp2 = add i32 %Wp, %Wp
|
|
br label %M
|
|
M:
|
|
; This phi should be foldable if threshold >= 7
|
|
%W = phi i32 [ %Wp2, %N ], [ 2, %entry ]
|
|
%R = add i32 %W, 1
|
|
ret i32 %R
|
|
}
|
|
|