File: unreachable.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (40 lines) | stat: -rw-r--r-- 877 bytes parent folder | download | duplicates (10) 
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
 
; RUN: opt < %s -S -passes=msan 2>&1 | FileCheck %s
; RUN: opt < %s -msan -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"


; Test that MemorySanitizer correctly handles unreachable blocks.

define i32 @Func(i32* %p) nounwind uwtable {
entry:
  br label %exit

unreachable:
  %x = load i32, i32* %p
  br label %exit

exit:
  %z = phi i32 [ 42, %entry ], [ %x, %unreachable ]
  ret i32 %z
}

; CHECK-LABEL: @Func
; CHECK: store i32 0, {{.*}} @__msan_retval_tls
; CHECK: ret i32 42


define i32 @UnreachableLoop() nounwind uwtable {
entry:
  ret i32 0

zzz:
  br label %xxx

xxx:
  br label %zzz
}

; CHECK-LABEL: @UnreachableLoop
; CHECK: store i32 0, {{.*}} @__msan_retval_tls
; CHECK: ret i32 0