File: full-unroll-heuristics-phi-prop.ll

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.8-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,696 kB
  • sloc: cpp: 7,438,781; ansic: 1,393,871; asm: 1,012,926; python: 241,771; f90: 86,635; objc: 75,411; lisp: 42,144; pascal: 17,286; sh: 8,596; ml: 5,082; perl: 4,730; makefile: 3,591; awk: 3,523; javascript: 2,251; xml: 892; fortran: 672
file content (24 lines) | stat: -rw-r--r-- 870 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
; RUN: opt < %s -S -passes=loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=10 -unroll-max-percent-threshold-boost=200 | FileCheck %s
; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(loop-unroll-full)' -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=10 -unroll-max-percent-threshold-boost=200 | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"

define i64 @propagate_loop_phis() {
; CHECK-LABEL: @propagate_loop_phis(
; CHECK-NOT: br i1
; CHECK: ret i64 3
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %inc, %loop ]
  %x0 = phi i64 [ 0, %entry ], [ %x2, %loop ]
  %x1 = or i64 %x0, 1
  %x2 = or i64 %x1, 2
  %inc = add nuw nsw i64 %iv, 1
  %cond = icmp sge i64 %inc, 10
  br i1 %cond, label %loop.end, label %loop

loop.end:
  %x.lcssa = phi i64 [ %x2, %loop ]
  ret i64 %x.lcssa
}