xref: /llvm-project/llvm/test/Instrumentation/DataFlowSanitizer/phi.ll (revision ecb85b5cd89f9797c538675ee3ab93e350c57bd5) 
1; RUN: opt < %s -passes=dfsan -S | FileCheck %s
2target 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"
3target triple = "x86_64-unknown-linux-gnu"
4
5define {i32, i32} @test({i32, i32} %a, i1 %c) {
6  ; CHECK: %[[#AL:]] = load { i8, i8 }, ptr @__dfsan_arg_tls, align [[ALIGN:2]]
7  ; CHECK: %[[#AL0:]] = insertvalue { i8, i8 } %[[#AL]], i8 0, 0
8  ; CHECK: %[[#AL1:]] = insertvalue { i8, i8 } %[[#AL]], i8 0, 1
9  ; CHECK: %[[#PL:]] = phi { i8, i8 } [ %[[#AL0]], %T ], [ %[[#AL1]], %F ]
10  ; CHECK: store { i8, i8 } %[[#PL]], ptr @__dfsan_retval_tls, align [[ALIGN]]
11
12entry:
13  br i1 %c, label %T, label %F
14
15T:
16  %at = insertvalue {i32, i32} %a, i32 1, 0
17  br label %done
18
19F:
20  %af = insertvalue {i32, i32} %a, i32 1, 1
21  br label %done
22
23done:
24  %b = phi {i32, i32} [%at, %T], [%af, %F]
25  ret {i32, i32} %b
26}
27