Created
August 31, 2018 17:01
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/* clang-6 -O1 -S -emit-llvm | |
extern int f(int); | |
int g(int in) | |
{ | |
int x = 0; | |
switch(in) | |
{ | |
case 0: | |
x += f(in); | |
case 1: | |
x += 34; | |
case 2: | |
return in; | |
} | |
return f(x); | |
} | |
*/ | |
define i32 @g(i32) local_unnamed_addr #0 { | |
switch i32 %0, label %4 [ | |
i32 0, label %2 | |
i32 1, label %6 | |
i32 2, label %6 | |
] | |
; <label>:2: ; preds = %1 | |
%3 = tail call i32 @f(i32 %0) #2 | |
br label %6 | |
; <label>:4: ; preds = %1 | |
%5 = tail call i32 @f(i32 0) #2 | |
br label %6 | |
; <label>:6: ; preds = %1, %1, %2, %4 | |
%7 = phi i32 [ %5, %4 ], [ 0, %2 ], [ %0, %1 ], [ %0, %1 ] | |
ret i32 %7 | |
} | |
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