50 lines
1.7 KiB
LLVM
50 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=1 | FileCheck %s --check-prefix=ALL --check-prefix=CHECK-ONE
|
|
; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=2 | FileCheck %s --check-prefix=ALL --check-prefix=CHECK-TWO
|
|
; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=7 | FileCheck %s --check-prefix=ALL --check-prefix=CHECK-SEVEN
|
|
|
|
; Test merging of blocks containing complex expressions,
|
|
; with various folding thresholds
|
|
|
|
define i32 @test(i1 %a, i1 %b, i32 %i, i32 %j, i32 %k) {
|
|
; ALL-LABEL: @test(
|
|
; ALL-NEXT: entry:
|
|
; ALL-NEXT: br i1 [[A:%.*]], label [[M:%.*]], label [[O:%.*]]
|
|
; ALL: O:
|
|
; ALL-NEXT: [[IAJ:%.*]] = add i32 [[I:%.*]], [[J:%.*]]
|
|
; ALL-NEXT: [[IAJAK:%.*]] = add i32 [[IAJ]], [[K:%.*]]
|
|
; ALL-NEXT: [[IXJ:%.*]] = xor i32 [[I]], [[J]]
|
|
; ALL-NEXT: [[IXJXK:%.*]] = xor i32 [[IXJ]], [[K]]
|
|
; ALL-NEXT: [[WP:%.*]] = select i1 [[B:%.*]], i32 [[IAJAK]], i32 [[IXJXK]]
|
|
; ALL-NEXT: [[WP2:%.*]] = add i32 [[WP]], [[WP]]
|
|
; ALL-NEXT: br label [[M]]
|
|
; ALL: M:
|
|
; ALL-NEXT: [[W:%.*]] = phi i32 [ [[WP2]], [[O]] ], [ 2, [[ENTRY:%.*]] ]
|
|
; ALL-NEXT: [[R:%.*]] = add i32 [[W]], 1
|
|
; ALL-NEXT: ret i32 [[R]]
|
|
;
|
|
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
|
|
}
|
|
|