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
|
// RUN: %clang_cc1 -triple x86_64 -emit-llvm %s -o - -fwrapv -fsanitize=signed-integer-overflow | FileCheck %s --check-prefix=WRAPV
// RUN: %clang_cc1 -triple x86_64 -emit-llvm %s -o - -ftrapv | FileCheck %s --check-prefixes=BOTH-TRAP,TRAPV
// RUN: %clang_cc1 -triple x86_64 -emit-llvm %s -o - -fsanitize=signed-integer-overflow | FileCheck %s --check-prefixes=BOTH-TRAP,CATCH_UB
// COM: TODO: Support -ftrapv-handler.
extern int abs(int x);
int absi(int x) {
// WRAPV: [[ABS:%.*]] = call i32 @llvm.abs.i32(i32 %0, i1 false)
// WRAPV-NEXT: ret i32 [[ABS]]
//
// BOTH-TRAP: [[NEG:%.*]] = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 0, i32 [[X:%.*]])
// BOTH-TRAP: [[NEGV:%.*]] = extractvalue { i32, i1 } [[NEG]], 0
// BOTH-TRAP: [[OFL:%.*]] = extractvalue { i32, i1 } [[NEG]], 1
// BOTH-TRAP: [[NOFL:%.*]] = xor i1 [[OFL]], true
// BOTH-TRAP: br i1 [[NOFL]], label %[[CONT:.*]], label %[[TRAP:[a-zA-Z_.]*]]
// BOTH-TRAP: [[TRAP]]:
// TRAPV-NEXT: llvm.ubsantrap
// CATCH_UB: @__ubsan_handle_negate_overflow
// BOTH-TRAP-NEXT: unreachable
// BOTH-TRAP: [[CONT]]:
// BOTH-TRAP-NEXT: [[ABSCOND:%.*]] = icmp slt i32 [[X]], 0
// BOTH-TRAP-NEXT: select i1 [[ABSCOND]], i32 [[NEGV]], i32 [[X]]
return abs(x);
}
int babsi(int x) {
// WRAPV: [[ABS:%.*]] = call i32 @llvm.abs.i32(i32 %0, i1 false)
// WRAPV-NEXT: ret i32 [[ABS]]
//
// BOTH-TRAP: [[NEG:%.*]] = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 0, i32 [[X:%.*]])
// BOTH-TRAP: [[NEGV:%.*]] = extractvalue { i32, i1 } [[NEG]], 0
// BOTH-TRAP: [[OFL:%.*]] = extractvalue { i32, i1 } [[NEG]], 1
// BOTH-TRAP: [[NOFL:%.*]] = xor i1 [[OFL]], true
// BOTH-TRAP: br i1 [[NOFL]], label %[[CONT:.*]], label %[[TRAP:[a-zA-Z_.]*]]
// BOTH-TRAP: [[TRAP]]:
// TRAPV-NEXT: llvm.ubsantrap
// CATCH_UB: @__ubsan_handle_negate_overflow
// BOTH-TRAP-NEXT: unreachable
// BOTH-TRAP: [[CONT]]:
// BOTH-TRAP-NEXT: [[ABSCOND:%.*]] = icmp slt i32 [[X]], 0
// BOTH-TRAP-NEXT: select i1 [[ABSCOND]], i32 [[NEGV]], i32 [[X]]
return __builtin_abs(x);
}
|
