File: pr72046.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,998,492 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (19 lines) | stat: -rw-r--r-- 903 bytes parent folder | download | duplicates (8) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
; RUN: opt -S -passes='require<profile-summary>,function(codegenprepare)' -mtriple=x86_64-unknown-unknown < %s | FileCheck %s

; Make sure the nneg flag is dropped when lshr and zext are interchanged.
define i8 @get(ptr %box, i32 %in) {
; CHECK-LABEL: define i8 @get(
; CHECK-SAME: ptr [[BOX:%.*]], i32 [[IN:%.*]]) {
; CHECK-NEXT:    [[PROMOTED:%.*]] = zext i32 [[IN]] to i64
; CHECK-NEXT:    [[SHR:%.*]] = lshr i64 [[PROMOTED]], 24
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[BOX]], i64 [[SHR]]
; CHECK-NEXT:    [[RES:%.*]] = load i8, ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    ret i8 [[RES]]
;
  %shr = lshr i32 %in, 24
  %idxprom = zext nneg i32 %shr to i64
  %arrayidx = getelementptr inbounds i8, ptr %box, i64 %idxprom
  %res = load i8, ptr %arrayidx, align 1
  ret i8 %res
}