File: fold-phi.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 (39 lines) | stat: -rw-r--r-- 1,016 bytes parent folder | download | duplicates (19) 
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
 
; RUN: opt < %s -passes=instcombine -S | FileCheck %s

; CHECK: no_crash
define float @no_crash(float %a, i1 %c1) nounwind {
entry:
  br label %for.body

for.body:
  %sum.057 = phi float [ 0.000000e+00, %entry ], [ %add5, %bb0 ]
  %add5 = fadd float %sum.057, %a    ; PR14592
  br i1 %c1, label %bb0, label %end

bb0:
  br label %for.body

end:
  ret float %add5
}

; CHECK-LABEL: @pr21377(
define void @pr21377(i32, i1 %c1) {
entry:
  br label %while.body

while.body:                                       ; preds = %if.end, %entry
  %phi1 = phi i64 [ poison, %entry ], [ %or2, %if.end ]
  %zext = zext i32 %0 to i64
  br i1 %c1, label %if.end, label %if.else

if.else:                                          ; preds = %while.body
  %or1 = or i64 %phi1, %zext
  %and = and i64 %or1, 4294967295
  br label %if.end

if.end:                                           ; preds = %if.else, %while.body
  %phi2 = phi i64 [ %and, %if.else ], [ poison, %while.body ]
  %or2 = or i64 %phi2, %zext
  br label %while.body
}