const char *shader_load_error_code_str(int ec) {
  const char *str = "";
  switch (ec) {
  case 1:
    str = "invalid #include param";
    break;
  case 2:
    str = "could not find file";
    break;
  case 3:
    str = "error while including file";
    break;
  }
  return str;
}


x86 assembly (clang, -O0):
<shader_load_error_code_str>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
lea    0xf1c(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x4(%rbp),%eax
mov    %eax,-0x14(%rbp)
sub    $0x1,%eax
je     1148 <shader_load_error_code_str+0x48>
jmp    1126 <shader_load_error_code_str+0x26>
mov    -0x14(%rbp),%eax
sub    $0x2,%eax
je     1158 <shader_load_error_code_str+0x58>
jmp    1137 <shader_load_error_code_str+0x37>
mov    -0x14(%rbp),%eax
sub    $0x3,%eax
je     1168 <shader_load_error_code_str+0x68>
jmp    1173 <shader_load_error_code_str+0x73>
lea    0xeb1(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1173 <shader_load_error_code_str+0x73>
lea    0xeb8(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1173 <shader_load_error_code_str+0x73>
lea    0xebc(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<shader_load_error_code_str>:
add    $0xffffffff,%edi
cmp    $0x2,%edi
ja     111a <shader_load_error_code_str+0x1a>
movslq %edi,%rax
lea    0xf36(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf09(%rip),%rax
ret

LLVM IR (-O0):
@.str = [1 x i8] zeroinitializer
@.str.1 = [23 x i8] c"invalid #include param\00"
@.str.2 = [20 x i8] c"could not find file\00"
@.str.3 = [27 x i8] c"error while including file\00"
define i8* @shader_load_error_code_str(i32 %0) {
%2 = alloca i32
%3 = alloca i8*
store i32 %0, i32* %2
store i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), i8** %3
%4 = load i32, i32* %2
switch i32 %4, label %8 [
i32 1, label %5
i32 2, label %6
i32 3, label %7
]
5: ; preds = %1
store i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0), i8** %3
br label %8
6: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i8** %3
br label %8
7: ; preds = %1
store i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.3, i64 0, i64 0), i8** %3
br label %8
8: ; preds = %1, %7, %6, %5
%9 = load i8*, i8** %3
ret i8* %9
}

LLVM IR (-O2):
@.str = [1 x i8] zeroinitializer
@.str.1 = [23 x i8] c"invalid #include param\00"
@.str.2 = [20 x i8] c"could not find file\00"
@.str.3 = [27 x i8] c"error while including file\00"
@reltable.shader_load_error_code_str = [3 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([23 x i8]* @.str.1 to i64), i64 ptrtoint ([3 x i32]* @reltable.shader_load_error_code_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.2 to i64), i64 ptrtoint ([3 x i32]* @reltable.shader_load_error_code_str to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([27 x i8]* @.str.3 to i64), i64 ptrtoint ([3 x i32]* @reltable.shader_load_error_code_str to i64)) to i32)]
define i8* @shader_load_error_code_str(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 3
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([3 x i32]* @reltable.shader_load_error_code_str to i8*), i64 %6)
br label %8
8: ; preds = %4, %1
%9 = phi i8* [ getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), %1 ], [ %7, %4 ]
ret i8* %9
}