File: x32-indirectbr.ll

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (26 lines) | stat: -rw-r--r-- 949 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
; RUN: llc < %s -mtriple=x86_64-none-none-gnux32 -mcpu=generic | FileCheck %s
; RUN: llc < %s -mtriple=x86_64-none-none-gnux32 -mcpu=generic -fast-isel | FileCheck %s
; Bug 22859
;
; x32 pointers are 32-bits wide. x86-64 indirect branches use the full 64-bit
; registers. Therefore, x32 CodeGen needs to zero extend indirectbr's target to
; 64-bit.

define i8 @test1() nounwind ssp {
entry:
  %0 = select i1 undef,                           ; <ptr> [#uses=1]
              ptr blockaddress(@test1, %bb),
              ptr blockaddress(@test1, %bb6)
  indirectbr ptr %0, [label %bb, label %bb6]
bb:                                               ; preds = %entry
  ret i8 1

bb6:                                              ; preds = %entry
  ret i8 2
}
; CHECK-LABEL: @test1
; We are looking for a movl ???, %r32 followed by a 64-bit jmp through the
; same register.
; CHECK: movl {{.*}}, %{{e|r}}[[REG:.[^d]*]]{{d?}}
; CHECK-NEXT: jmpq *%r[[REG]]