File: pre-jt-add.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (36 lines) | stat: -rw-r--r-- 683 bytes parent folder | download | duplicates (23) 
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
 
; RUN: opt < %s -passes=gvn,jump-threading -enable-pre -S | FileCheck %s

@H = common global i32 0
@G = common global i32 0

define i32 @test(i1 %cond, i32 %v) nounwind {
; CHECK-LABEL: @test
entry:
  br i1 %cond, label %bb, label %bb1

bb:
; CHECK: store
; CHECK-NOT: br label %return
  %add.1 = add nuw nsw i32 %v, -1
  store i32 %add.1, ptr @G, align 4
  br label %merge

bb1:
  br label %merge

merge:
  %add.2 = add i32 %v, -1
  %cmp = icmp sgt i32 %add.2, 0
  br i1 %cmp, label %action, label %return

action:
; CHECK: store
; CHECK-NEXT: br label %return
  store i32 %add.2, ptr @H, align 4
  br label %return

return:
  %p = phi i32 [0, %merge], [1, %action]
  ret i32 %p
}