llvm-project/clang/test/CodeGen/inline-asm-immediate-ubsan.c
Aaron Ballman adc402bf3d Use functions with prototypes when appropriate; NFC
A significant number of our tests in C accidentally use functions
without prototypes. This patch converts the function signatures to have
a prototype for the situations where the test is not specific to K&R C
declarations. e.g.,

  void func();

becomes

  void func(void);

This is the eleventh batch of tests being updated (there are a
significant number of other tests left to be updated).
2022-02-15 16:06:43 -05:00

31 lines
1023 B
C

// 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));
}