trunc_unreachable_bb.ll
1.51 KB
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
48
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -aggressive-instcombine -S | FileCheck %s
; RUN: opt < %s -passes=aggressive-instcombine -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"
; Aggressive Instcombine should be able ignore unreachable basic block.
define void @func_20() {
; CHECK-LABEL: @func_20(
; CHECK-NEXT: for.body94:
; CHECK-NEXT: unreachable
; CHECK: for.cond641:
; CHECK-NEXT: [[OR722:%.*]] = or i32 [[OR722]], undef
; CHECK-NEXT: [[OR723:%.*]] = or i32 [[OR722]], 1
; CHECK-NEXT: [[CONV724:%.*]] = trunc i32 [[OR723]] to i16
; CHECK-NEXT: br label [[FOR_COND641:%.*]]
;
for.body94:
unreachable
for.cond641:
%or722 = or i32 %or722, undef
%or723 = or i32 %or722, 1
%conv724 = trunc i32 %or723 to i16
br label %for.cond641
}
define void @func_21() {
; CHECK-LABEL: @func_21(
; CHECK-NEXT: for.body94:
; CHECK-NEXT: unreachable
; CHECK: for.cond641:
; CHECK-NEXT: [[OR722:%.*]] = or i32 [[A:%.*]], undef
; CHECK-NEXT: [[A]] = or i32 [[OR722]], undef
; CHECK-NEXT: [[OR723:%.*]] = or i32 [[OR722]], 1
; CHECK-NEXT: [[CONV724:%.*]] = trunc i32 [[OR723]] to i16
; CHECK-NEXT: br label [[FOR_COND641:%.*]]
;
for.body94:
unreachable
for.cond641:
%or722 = or i32 %a, undef
%a = or i32 %or722, undef
%or723 = or i32 %or722, 1
%conv724 = trunc i32 %or723 to i16
br label %for.cond641
}