File: darwin-tls-preserved.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (24 lines) | stat: -rw-r--r-- 749 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
 
; RUN: llc -mtriple=thumbv7k-apple-watchos2.0 -arm-atomic-cfg-tidy=0 -o - %s | FileCheck %s

@tls_var = thread_local global i32 0

; r9 and r12 can be live across the asm, but those get clobbered by the TLS
; access (in a different BB to order it).
define i32 @test_regs_preserved(ptr %ptr1, ptr %ptr2, i1 %tst1) {
; CHECK-LABEL: test_regs_preserved:
; CHECK: str {{.*}}, [sp
; CHECK: mov {{.*}}, r12
entry:
  call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r10},~{r11},~{r13},~{lr}"()
  br i1 %tst1, label %get_tls, label %done

get_tls:
  %val = load i32, ptr @tls_var
  br label %done

done:
  %res = phi i32 [%val, %get_tls], [0, %entry]
  store i32 42, ptr %ptr1
  store i32 42, ptr %ptr2
  ret i32 %res
}