File: branch-fold.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 (40 lines) | stat: -rw-r--r-- 995 bytes parent folder | download | duplicates (16) 
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
 
; RUN: llc < %s -march=nvptx64 -mcpu=sm_35 -disable-cgp | FileCheck %s
; Disable CGP which also folds branches, so that only BranchFolding is under
; the spotlight.

target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64"
target triple = "nvptx64-nvidia-cuda"

define void @foo(i32 %x, float* %output) {
; CHECK-LABEL: .visible .func foo(
; CHECK-NOT: bra.uni
; CHECK-NOT: LBB0_
  %1 = icmp eq i32 %x, 1
  br i1 %1, label %then, label %else

then:
  br label %merge

else:
  br label %merge

merge:
  store float 2.0, float* %output
  ret void
}

; PR24299. no crash
define ptx_kernel void @hoge() #0 {
; CHECK-LABEL: .visible .entry hoge(
bb:
  br i1 undef, label %bb1, label %bb4

bb1:                                              ; preds = %bb1, %bb
  %tmp = phi i64 [ %tmp2, %bb1 ], [ undef, %bb ]
  %tmp2 = add nsw i64 %tmp, 1
  %tmp3 = icmp sle i64 %tmp, 0
  br i1 %tmp3, label %bb1, label %bb4

bb4:                                              ; preds = %bb4, %bb1, %bb
  br label %bb4
}