File: mul128_sext_loop.ll

package info (click to toggle)
llvm-toolchain-3.9 1%3A3.9.1-9
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 441,144 kB
  • ctags: 428,836
  • sloc: cpp: 2,546,577; ansic: 538,318; asm: 119,677; objc: 103,316; python: 102,148; sh: 27,847; pascal: 5,626; ml: 5,510; perl: 5,293; lisp: 4,801; makefile: 2,177; xml: 686; cs: 362; php: 212; csh: 117
file content (32 lines) | stat: -rw-r--r-- 1,043 bytes parent folder | download | duplicates (6)
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 -march=x86-64 | FileCheck %s

define void @test(i64* nocapture %arr, i64 %arrsize, i64 %factor) nounwind uwtable {
  %1 = icmp sgt i64 %arrsize, 0
  br i1 %1, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0
  %2 = sext i64 %factor to i128
  br label %3

; <label>:3                                       ; preds = %3, %.lr.ph
; CHECK-NOT: mul
; CHECK: imulq
; CHECK-NOT: mul
  %carry.02 = phi i128 [ 0, %.lr.ph ], [ %10, %3 ]
  %i.01 = phi i64 [ 0, %.lr.ph ], [ %11, %3 ]
  %4 = getelementptr inbounds i64, i64* %arr, i64 %i.01
  %5 = load i64, i64* %4, align 8
  %6 = sext i64 %5 to i128
  %7 = mul nsw i128 %6, %2
  %8 = add nsw i128 %7, %carry.02
  %.tr = trunc i128 %8 to i64
  %9 = and i64 %.tr, 9223372036854775807
  store i64 %9, i64* %4, align 8
  %10 = ashr i128 %8, 63
  %11 = add nsw i64 %i.01, 1
  %exitcond = icmp eq i64 %11, %arrsize
  br i1 %exitcond, label %._crit_edge, label %3

._crit_edge:                                      ; preds = %3, %0
  ret void
}