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
45
46
47
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=ipsccp -S | FileCheck %s
; This test case used to end up like this:
;
; While deleting: label %lor.rhs
; Use still stuck around after Def is destroyed: br i1 undef, label %lor.rhs, label %land.end
; opt: ../lib/IR/Value.cpp: llvm::Value::~Value(): Assertion `use_empty() && "Uses remain when a value is destroyed!"' failed.
;
; due to ConstantFoldTerminator rewriting the switch into
;
; br i1 undef, label %lor.rhs, label %land.end
;
; while SCCP implementation relied on the terminator to always be folded into
; an unconditional branch when ConstantFoldTerminator returned true.
define void @f4() {
; CHECK-LABEL: define void @f4(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CALL:%.*]] = call i16 @f3(i16 undef)
; CHECK-NEXT: ret void
;
entry:
%call = call i16 @f3(i16 undef)
ret void
}
define internal i16 @f3(i16 %p1) {
; CHECK-LABEL: define internal i16 @f3(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LAND_END:%.*]]
; CHECK: land.end:
; CHECK-NEXT: ret i16 undef
;
entry:
switch i16 %p1, label %land.end [
i16 0, label %land.end
i16 1, label %lor.rhs
]
lor.rhs:
br label %land.end
land.end:
ret i16 0
}
|
