File: inline-asm-immediate-ubsan.c

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (30 lines) | stat: -rw-r--r-- 1,023 bytes parent folder | download | duplicates (17) 
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
 
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s \
// RUN:     -fsanitize=signed-integer-overflow \
// RUN:   | FileCheck %s

// Verify we emit constants for "immediate" inline assembly arguments.
// Emitting a scalar expression can make the immediate be generated as
// overflow intrinsics, if the overflow sanitizer is enabled.

// Check both 'i' and 'I':
// - 'i' accepts symbolic constants.
// - 'I' doesn't, and is really an immediate-required constraint.

// See also PR23517.

// CHECK-LABEL: @test_inlineasm_i
// CHECK: call void asm sideeffect "int $0", "i{{.*}}"(i32 2)
void test_inlineasm_i(void) {
  __asm__ __volatile__("int %0" :: "i"(1 + 1));
}

// CHECK-LABEL: @test_inlineasm_I
// CHECK: call void asm sideeffect "int $0", "I{{.*}}"(i32 2)
// CHECK: call void asm sideeffect "int $0", "I{{.*}}"(i32 3)
void test_inlineasm_I(void) {
  __asm__ __volatile__("int %0" :: "I"(1 + 1));

  // Also check a C non-ICE.
  static const int N = 1;
  __asm__ __volatile__("int %0" :: "I"(N + 2));
}