mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
41 lines
1.1 KiB
LLVM
41 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; Test merging of blocks that only have PHI nodes in them. This tests the case
|
|
; where the mergedinto block doesn't have any PHI nodes, and is in fact
|
|
; dominated by the block-to-be-eliminated
|
|
;
|
|
; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
|
|
;
|
|
|
|
declare i1 @foo()
|
|
|
|
define i32 @test(i1 %a, i1 %b) {
|
|
; CHECK-LABEL: @test(
|
|
; CHECK-NEXT: [[C:%.*]] = call i1 @foo()
|
|
; CHECK-NEXT: br i1 [[C]], label [[M:%.*]], label [[P:%.*]]
|
|
; CHECK: P:
|
|
; CHECK-NEXT: [[D:%.*]] = call i1 @foo()
|
|
; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[D]], i32 2, i32 1
|
|
; CHECK-NEXT: br label [[M]]
|
|
; CHECK: M:
|
|
; CHECK-NEXT: [[W:%.*]] = phi i32 [ 0, [[TMP0:%.*]] ], [ [[SPEC_SELECT]], [[P]] ]
|
|
; CHECK-NEXT: [[R:%.*]] = add i32 [[W]], 1
|
|
; CHECK-NEXT: ret i32 [[R]]
|
|
;
|
|
%c = call i1 @foo()
|
|
br i1 %c, label %N, label %P
|
|
P:
|
|
%d = call i1 @foo()
|
|
br i1 %d, label %N, label %Q
|
|
Q:
|
|
br label %N
|
|
N:
|
|
%W = phi i32 [0, %0], [1, %Q], [2, %P]
|
|
; This block should be foldable into M
|
|
br label %M
|
|
|
|
M:
|
|
%R = add i32 %W, 1
|
|
ret i32 %R
|
|
}
|
|
|