File: callbr.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (29 lines) | stat: -rw-r--r-- 848 bytes parent folder | download | duplicates (12) 
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
 
; RUN: opt -passes=pgo-instr-gen -S 2>&1 < %s | FileCheck %s
;
; RUN: llvm-profdata merge %S/Inputs/callbr.proftext -o %t.profdata
; RUN: opt < %s -passes=pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE


define i32 @a() {
entry:
; CHECK-NOT: ptrtoint ptr asm sideeffect
; CHECK: callbr void asm sideeffect
  %retval = alloca i32, align 4
  callbr void asm sideeffect "", "!i,~{dirflag},~{fpsr},~{flags}"() #1
          to label %asm.fallthrough [label %b]

asm.fallthrough:
  br label %b

b:
  %0 = load i32, ptr %retval, align 4
  ret i32 %0
}
; USE-LABEL: @a
; USE-SAME: !prof ![[BW_ENTRY:[0-9]+]]
; USE: callbr void asm sideeffect
; USE: to label
; USE-SAME: !prof ![[BW_CALLBR:[0-9]+]]
; USE ![[BW_ENTRY]] = !{!"function_entry_count", i64 100}
; USE ![[BW_CALLBR]] = !{!"branch_weights", i32 80, i32 20}