Aaron Ballman ed509fe296 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 tenth batch of tests being updated (there are a
significant number of other tests left to be updated).
2022-02-15 09:28:02 -05:00

33 lines
944 B
C

// RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - %s | FileCheck %s
// Check that we don't generate unnecessary reloads.
//
// CHECK-LABEL: define{{.*}} void @f0()
// CHECK: [[x_0:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[y_0:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 1, i32* [[x_0]]
// CHECK-NEXT: store i32 1, i32* [[x_0]]
// CHECK-NEXT: store i32 1, i32* [[y_0]]
// CHECK: }
void f0(void) {
int x, y;
x = 1;
y = (x = 1);
}
// This used to test that we generate reloads for volatile access,
// but that does not appear to be correct behavior for C.
//
// CHECK-LABEL: define{{.*}} void @f1()
// CHECK: [[x_1:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[y_1:%.*]] = alloca i32, align 4
// CHECK-NEXT: store volatile i32 1, i32* [[x_1]]
// CHECK-NEXT: store volatile i32 1, i32* [[x_1]]
// CHECK-NEXT: store volatile i32 1, i32* [[y_1]]
// CHECK: }
void f1(void) {
volatile int x, y;
x = 1;
y = (x = 1);
}