File: umul-with-carry.ll

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (44 lines) | stat: -rw-r--r-- 1,336 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
32
33
34
35
36
37
38
39
40
41
42
43
44
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i386-- | FileCheck %s

; FIXME: umul-with-overflow not supported yet.

@ok = internal constant [4 x i8] c"%d\0A\00"
@no = internal constant [4 x i8] c"no\0A\00"

define i1 @func(i32 %v1, i32 %v2) nounwind {
; CHECK-LABEL: func:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %eax
; CHECK-NEXT:    mull {{[0-9]+}}(%esp)
; CHECK-NEXT:    jno .LBB0_1
; CHECK-NEXT:  # %bb.2: # %carry
; CHECK-NEXT:    pushl $no
; CHECK-NEXT:    calll printf@PLT
; CHECK-NEXT:    addl $4, %esp
; CHECK-NEXT:    xorl %eax, %eax
; CHECK-NEXT:    retl
; CHECK-NEXT:  .LBB0_1: # %normal
; CHECK-NEXT:    pushl %eax
; CHECK-NEXT:    pushl $ok
; CHECK-NEXT:    calll printf@PLT
; CHECK-NEXT:    addl $8, %esp
; CHECK-NEXT:    movb $1, %al
; CHECK-NEXT:    retl
entry:
  %t = call {i32, i1} @llvm.umul.with.overflow.i32(i32 %v1, i32 %v2)
  %sum = extractvalue {i32, i1} %t, 0
  %obit = extractvalue {i32, i1} %t, 1
  br i1 %obit, label %carry, label %normal

normal:
  %t1 = tail call i32 (ptr, ...) @printf( ptr @ok, i32 %sum ) nounwind
  ret i1 true

carry:
  %t2 = tail call i32 (ptr, ...) @printf( ptr @no ) nounwind
  ret i1 false
}

declare i32 @printf(ptr, ...) nounwind
declare {i32, i1} @llvm.umul.with.overflow.i32(i32, i32)