File: inline-asm-immediate-ubsan.c

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (30 lines) | stat: -rw-r--r-- 1,023 bytes parent folder | download | duplicates (15) 
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));
}