File: TruncAssertSext.ll

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (20 lines) | stat: -rw-r--r-- 615 bytes parent folder | download | duplicates (29) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -O2 -mtriple=x86_64-unknown-unknown | FileCheck %s
; Checks that a zeroing mov is inserted for the trunc/zext pair even when
; the source of the zext is an AssertSext node
; PR20494

define i64 @main(i64 %a) {
; CHECK-LABEL: main:
; CHECK:       # %bb.0:
; CHECK-NEXT:    orq $-2, %rdi
; CHECK-NEXT:    movl %edi, %eax
; CHECK-NEXT:    retq
  %or = or i64 %a, -2
  %trunc = trunc i64 %or to i32
  br label %l
l:
  %ext = zext i32 %trunc to i64
  trunc i64 %or to i32 ; to keep the or from being narrowed
  ret i64 %ext
}