File: i386-tlscall-fastregalloc.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 (31 lines) | stat: -rw-r--r-- 1,017 bytes parent folder | download | duplicates (13) 
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
 
; RUN: llc %s -o - -O0 -regalloc=fast | FileCheck %s
target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128"
target triple = "i386-apple-macosx10.10"

@c = external global i8, align 1
@p = thread_local global ptr null, align 4

; Check that regalloc fast correctly preserves EAX that is set by the TLS call
; until the actual use.
; PR26485.
;
; CHECK-LABEL: f:
; Get c.
; C is spilled because of the scheduling of the instructions,
; but a smarter regalloc wouldn't have spilled it.
; CHECK: movl L_c{{[^,]*}}, [[C_ADDR:%[a-z]+]]
; CHECK-NEXT: movl [[C_ADDR]], [[C_SPILLED:[0-8]+\(%esp\)]]
; Get p.
; CHECK-NEXT: movl _p@{{[0-9a-zA-Z]+}}, [[P_ADDR:%[a-z]+]]
; CHECK-NEXT: calll *([[P_ADDR]])
; At this point eax contiains the address of p.
; Load c address.
; Make sure we do not clobber eax.
; CHECK-NEXT: movl [[C_SPILLED]], [[C_ADDR_RELOADED:%e[b-z]x+]]
; Store c address into p.
; CHECK-NEXT: movl [[C_ADDR_RELOADED]], (%eax)
define void @f() #0 {
entry:
  store ptr @c, ptr @p, align 4
  ret void
}