File: read-reg.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (35 lines) | stat: -rw-r--r-- 925 bytes parent folder | download | duplicates (6) 
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
 
; RUN: opt -S -early-cse -earlycse-debug-hash < %s | FileCheck %s
; RUN: opt -S -basic-aa -early-cse-memssa < %s | FileCheck %s
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-unknown-linux-gnu"

; Function Attrs: nounwind
define i64 @f(i64 %x) #0 {
entry:
  %0 = call i64 @llvm.read_register.i64(metadata !0)
  call void bitcast (void (...)* @foo to void ()*)()
  %1 = call i64 @llvm.read_register.i64(metadata !0)
  %add = add nsw i64 %0, %1
  ret i64 %add
}

; CHECK-LABEL: @f
; CHECK: call i64 @llvm.read_register.i64
; CHECK: call i64 @llvm.read_register.i64

; Function Attrs: nounwind readnone
declare i64 @llvm.read_register.i64(metadata) #1

; Function Attrs: nounwind
declare void @llvm.write_register.i64(metadata, i64) #2

declare void @foo(...)

attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }
attributes #2 = { nounwind }

!llvm.named.register.r1 = !{!0}

!0 = !{!"r1"}