File: TailDuplication-convergent.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (45 lines) | stat: -rw-r--r-- 1,005 bytes parent folder | download | duplicates (17) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
 
; RUN: llc -O2 -tail-dup-size=100 -enable-tail-merge=0 < %s | FileCheck %s
target triple = "nvptx64-nvidia-cuda"

declare void @foo()
declare void @llvm.nvvm.barrier0()

; syncthreads shouldn't be duplicated.
; CHECK: .func call_syncthreads
; CHECK: bar.sync
; CHECK-NOT: bar.sync
define void @call_syncthreads(i32* %a, i32* %b, i1 %cond, i1 %cond2) nounwind {
  br i1 %cond, label %L1, label %L2
  br i1 %cond2, label %Ret, label %L1
Ret:
  ret void
L1:
  store i32 0, i32* %a
  br label %L42
L2:
  store i32 1, i32* %a
  br label %L42
L42:
  call void @llvm.nvvm.barrier0()
  br label %Ret
}

; Check that call_syncthreads really does trigger tail duplication.
; CHECK: .func call_foo
; CHECK: call
; CHECK: call
define void @call_foo(i32* %a, i32* %b, i1 %cond, i1 %cond2) nounwind {
  br i1 %cond, label %L1, label %L2
  br i1 %cond2, label %Ret, label %L1
Ret:
  ret void
L1:
  store i32 0, i32* %a
  br label %L42
L2:
  store i32 1, i32* %a
  br label %L42
L42:
  call void @foo()
  br label %Ret
}