1; RUN: opt < %s -simplify-libcalls -S -o %t 2; RUN: FileCheck < %t %s 3 4@str = internal constant [13 x i8] c"hello world\0A\00" ; <[13 x i8]*> [#uses=1] 5@str1 = internal constant [2 x i8] c"h\00" ; <[2 x i8]*> [#uses=1] 6 7declare i32 @printf(i8*, ...) 8 9; CHECK: define void @f0 10; CHECK-NOT: printf 11; CHECK: } 12define void @f0() { 13entry: 14 %tmp1 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([13 x i8]* @str, i32 0, i32 0) ) ; <i32> [#uses=0] 15 ret void 16} 17 18; CHECK: define void @f1 19; CHECK-NOT: printf 20; CHECK: } 21define void @f1() { 22entry: 23 %tmp1 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([2 x i8]* @str1, i32 0, i32 0) ) ; <i32> [#uses=0] 24 ret void 25} 26 27; Verify that we don't turn this into a putchar call (thus changing the return 28; value). 29; 30; CHECK: define i32 @f2 31; CHECK: printf 32; CHECK: } 33define i32 @f2() { 34 %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([2 x i8]* @str1, i32 0, i32 0)) 35 ret i32 %call 36} 37