1// RUN: %clang_cc1 -triple i386-unknown-unknown -emit-llvm -Os -o - %s | FileCheck %s 2// CHECK: define signext i8 @f0(i32 %x) nounwind 3// CHECK: define zeroext i8 @f1(i32 %x) nounwind 4// CHECK: define void @f2(i8 signext %x) nounwind 5// CHECK: define void @f3(i8 zeroext %x) nounwind 6// CHECK: define signext i16 @f4(i32 %x) nounwind 7// CHECK: define zeroext i16 @f5(i32 %x) nounwind 8// CHECK: define void @f6(i16 signext %x) nounwind 9// CHECK: define void @f7(i16 zeroext %x) nounwind 10 11signed char f0(int x) { return x; } 12 13unsigned char f1(int x) { return x; } 14 15void f2(signed char x) { } 16 17void f3(unsigned char x) { } 18 19signed short f4(int x) { return x; } 20 21unsigned short f5(int x) { return x; } 22 23void f6(signed short x) { } 24 25void f7(unsigned short x) { } 26 27// CHECK: define void @f8() 28// CHECK: nounwind 29// CHECK: alwaysinline 30// CHECK: { 31void __attribute__((always_inline)) f8(void) { } 32 33// CHECK: call void @f9_t() 34// CHECK: noreturn 35// CHECK: { 36void __attribute__((noreturn)) f9_t(void); 37void f9(void) { f9_t(); } 38 39// FIXME: We should be setting nounwind on calls. 40// CHECK: call i32 @f10_t() 41// CHECK: readnone 42// CHECK: { 43int __attribute__((const)) f10_t(void); 44int f10(void) { return f10_t(); } 45int f11(void) { 46 exit: 47 return f10_t(); 48} 49int f12(int arg) { 50 return arg ? 0 : f10_t(); 51} 52 53// CHECK: define void @f13() nounwind readnone 54void f13(void) __attribute__((pure)) __attribute__((const)); 55void f13(void){} 56 57 58// Ensure that these get inlined: rdar://6853279 59// CHECK: define void @f14 60// CHECK-NOT: @ai_ 61// CHECK: call void @f14_end 62static __inline__ __attribute__((always_inline)) 63int ai_1() { return 4; } 64 65static __inline__ __attribute__((always_inline)) 66struct { 67 int a, b, c, d, e; 68} ai_2() { while (1) {} } 69 70void f14(int a) { 71 extern void f14_end(void); 72 if (a) 73 ai_2(); 74 ai_1(); 75 f14_end(); 76} 77 78// <rdar://problem/7102668> [irgen] clang isn't setting the optsize bit on functions 79// CHECK: define void @f15 80// CHECK: optsize 81// CHECK: { 82void f15(void) { 83} 84 85// PR5254 86// CHECK: define void @f16 87// CHECK: alignstack(16) 88// CHECK: { 89void __attribute__((force_align_arg_pointer)) f16(void) { 90} 91 92// PR11038 93// CHECK: define void @f18() 94// CHECK: returns_twice 95// CHECK: { 96// CHECK: call void @f17() 97// CHECK: returns_twice 98// CHECK: ret void 99__attribute__ ((returns_twice)) void f17(void); 100__attribute__ ((returns_twice)) void f18(void) { 101 f17(); 102} 103 104// CHECK: define void @f19() 105// CHECK: { 106// CHECK: call i32 @setjmp(i32* null) 107// CHECK: returns_twice 108// CHECK: ret void 109typedef int jmp_buf[((9 * 2) + 3 + 16)]; 110int setjmp(jmp_buf); 111void f19(void) { 112 setjmp(0); 113} 114