File: jcc-indirect-thunk-kernel.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb11u2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,634,820 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 (32 lines) | stat: -rw-r--r-- 893 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
30
31
32
 
; RUN: llc < %s -O2 --code-model=kernel | FileCheck %s
; The intent of the test is that we do not generate conditional
; tail calls to the thunk.

target triple = "x86_64-unknown-linux-gnu"

define dso_local void @foo(ptr %something) #0 {
; CHECK-LABEL: foo:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    movq (%rdi), %r11
; CHECK-NEXT:    testq %r11, %r11
; Make sure that a JNE was not generated instead of a JE + JMP sequence
; CHECK-NOT:     jne
; CHECK-NEXT:    je .LBB0_1
; CHECK-NEXT:    bb.2: # %if.then
; CHECK-NEXT:    jmp __x86_indirect_thunk_r11
; CHECK-NEXT:    LBB0_1:
; CHECK-NEXT:    retq
entry:
  %0 = load ptr, ptr %something, align 8
  %tobool.not = icmp eq ptr %0, null
  br i1 %tobool.not, label %if.end, label %if.then

if.then:
  tail call void %0()
  br label %if.end

if.end:
  ret void
}

attributes #0 = { optsize "target-features"="+retpoline-external-thunk" }