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339 lines
7.8 KiB
339 lines
7.8 KiB
// RUN: %clang_analyze_cc1 %s \
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// RUN: -analyzer-checker=debug.DumpDominators \
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// RUN: -analyzer-checker=debug.DumpPostDominators \
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// RUN: -analyzer-checker=debug.DumpControlDependencies \
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// RUN: 2>&1 | FileCheck %s
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// Test the DominatorsTree implementation with various control flows
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int test1()
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{
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int x = 6;
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int y = x/2;
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int z;
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while(y > 0) {
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if(y < x) {
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x = x/y;
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y = y-1;
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}else{
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z = x - y;
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}
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x = x - 1;
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x = x - 1;
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}
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z = x+y;
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z = 3;
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return 0;
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}
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// [B9 (ENTRY)] -> [B8] -> [B7] -> [B6] -> [B5] -> [B3] -> [B2]
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// |\ \ / /
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// | \ ---> [B4] ---> /
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// | <---------------------------
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// V
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// [B1] -> [B0 (EXIT)]
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// CHECK: Control dependencies (Node#,Dependency#):
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// CHECK-NEXT: (2,7)
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// CHECK-NEXT: (3,7)
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// CHECK-NEXT: (4,6)
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// CHECK-NEXT: (4,7)
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// CHECK-NEXT: (5,6)
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// CHECK-NEXT: (5,7)
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// CHECK-NEXT: (6,7)
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// CHECK-NEXT: (7,7)
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// CHECK-NEXT: Immediate dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,1)
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// CHECK-NEXT: (1,7)
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// CHECK-NEXT: (2,3)
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// CHECK-NEXT: (3,6)
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// CHECK-NEXT: (4,6)
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// CHECK-NEXT: (5,6)
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// CHECK-NEXT: (6,7)
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// CHECK-NEXT: (7,8)
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// CHECK-NEXT: (8,9)
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// CHECK-NEXT: (9,9)
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// CHECK-NEXT: Immediate post dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,0)
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// CHECK-NEXT: (1,0)
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// CHECK-NEXT: (2,7)
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// CHECK-NEXT: (3,2)
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// CHECK-NEXT: (4,3)
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// CHECK-NEXT: (5,3)
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// CHECK-NEXT: (6,3)
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// CHECK-NEXT: (7,1)
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// CHECK-NEXT: (8,7)
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// CHECK-NEXT: (9,8)
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int test2()
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{
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int x,y,z;
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x = 10; y = 100;
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if(x > 0){
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y = 1;
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}else{
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while(x<=0){
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x++;
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y++;
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}
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}
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z = y;
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return 0;
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}
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// <-------------
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// / \
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// -----------> [B4] -> [B3] -> [B2]
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// / |
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// / V
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// [B7 (ENTRY)] -> [B6] -> [B5] -> [B1] -> [B0 (EXIT)]
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// CHECK: Control dependencies (Node#,Dependency#):
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// CHECK-NEXT: (2,4)
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// CHECK-NEXT: (2,6)
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// CHECK-NEXT: (3,4)
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// CHECK-NEXT: (3,6)
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// CHECK-NEXT: (4,6)
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// CHECK-NEXT: (4,4)
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// CHECK-NEXT: (5,6)
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// CHECK-NEXT: Immediate dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,1)
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// CHECK-NEXT: (1,6)
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// CHECK-NEXT: (2,3)
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// CHECK-NEXT: (3,4)
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// CHECK-NEXT: (4,6)
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// CHECK-NEXT: (5,6)
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// CHECK-NEXT: (6,7)
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// CHECK-NEXT: (7,7)
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// CHECK-NEXT: Immediate post dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,0)
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// CHECK-NEXT: (1,0)
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// CHECK-NEXT: (2,4)
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// CHECK-NEXT: (3,2)
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// CHECK-NEXT: (4,1)
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// CHECK-NEXT: (5,1)
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// CHECK-NEXT: (6,1)
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// CHECK-NEXT: (7,6)
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int test3()
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{
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int x,y,z;
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x = y = z = 1;
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if(x>0) {
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while(x>=0){
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while(y>=x) {
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x = x-1;
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y = y/2;
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}
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}
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}
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z = y;
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return 0;
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}
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// <- [B2] <-
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// / \
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// [B8 (ENTRY)] -> [B7] -> [B6] ---> [B5] -> [B4] -> [B3]
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// \ | \ /
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// \ | <-------------
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// \ \
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// --------> [B1] -> [B0 (EXIT)]
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// CHECK: Control dependencies (Node#,Dependency#):
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// CHECK-NEXT: (2,6)
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// CHECK-NEXT: (2,7)
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// CHECK-NEXT: (3,5)
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// CHECK-NEXT: (3,6)
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// CHECK-NEXT: (3,7)
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// CHECK-NEXT: (4,5)
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// CHECK-NEXT: (4,6)
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// CHECK-NEXT: (4,7)
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// CHECK-NEXT: (5,6)
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// CHECK-NEXT: (5,5)
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// CHECK-NEXT: (5,7)
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// CHECK-NEXT: (6,7)
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// CHECK-NEXT: (6,6)
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// CHECK-NEXT: Immediate dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,1)
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// CHECK-NEXT: (1,7)
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// CHECK-NEXT: (2,5)
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// CHECK-NEXT: (3,4)
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// CHECK-NEXT: (4,5)
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// CHECK-NEXT: (5,6)
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// CHECK-NEXT: (6,7)
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// CHECK-NEXT: (7,8)
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// CHECK-NEXT: (8,8)
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// CHECK-NEXT: Immediate post dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,0)
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// CHECK-NEXT: (1,0)
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// CHECK-NEXT: (2,6)
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// CHECK-NEXT: (3,5)
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// CHECK-NEXT: (4,3)
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// CHECK-NEXT: (5,2)
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// CHECK-NEXT: (6,1)
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// CHECK-NEXT: (7,1)
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// CHECK-NEXT: (8,7)
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int test4()
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{
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int y = 3;
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while(y > 0) {
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if(y < 3) {
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while(y>0)
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y ++;
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}else{
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while(y<10)
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y ++;
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}
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}
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return 0;
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}
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// <----------------------------------
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// / <----------------- \
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// / / \ \
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// [B12 (ENTRY)] -> [B11] -> [B10]-> [B9] -> [B8] ---> [B7] -> [B6] |
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// | \ \ /
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// | \ -----> [B2] --------/
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// | \ /
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// | -> [B5] -> [B4] -> [B3]
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// | \ /
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// | <------------
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// \
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// -> [B1] -> [B0 (EXIT)]
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// CHECK: Control dependencies (Node#,Dependency#):
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// CHECK-NEXT: (2,10)
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// CHECK-NEXT: (3,5)
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// CHECK-NEXT: (3,9)
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// CHECK-NEXT: (3,10)
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// CHECK-NEXT: (4,5)
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// CHECK-NEXT: (4,9)
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// CHECK-NEXT: (4,10)
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// CHECK-NEXT: (5,9)
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// CHECK-NEXT: (5,5)
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// CHECK-NEXT: (5,10)
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// CHECK-NEXT: (6,8)
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// CHECK-NEXT: (6,9)
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// CHECK-NEXT: (6,10)
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// CHECK-NEXT: (7,8)
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// CHECK-NEXT: (7,9)
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// CHECK-NEXT: (7,10)
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// CHECK-NEXT: (8,9)
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// CHECK-NEXT: (8,8)
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// CHECK-NEXT: (8,10)
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// CHECK-NEXT: (9,10)
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// CHECK-NEXT: (10,10)
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// CHECK-NEXT: Immediate dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,1)
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// CHECK-NEXT: (1,10)
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// CHECK-NEXT: (2,9)
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// CHECK-NEXT: (3,4)
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// CHECK-NEXT: (4,5)
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// CHECK-NEXT: (5,9)
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// CHECK-NEXT: (6,7)
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// CHECK-NEXT: (7,8)
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// CHECK-NEXT: (8,9)
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// CHECK-NEXT: (9,10)
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// CHECK-NEXT: (10,11)
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// CHECK-NEXT: (11,12)
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// CHECK-NEXT: (12,12)
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// CHECK-NEXT: Immediate post dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,0)
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// CHECK-NEXT: (1,0)
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// CHECK-NEXT: (2,10)
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// CHECK-NEXT: (3,5)
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// CHECK-NEXT: (4,3)
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// CHECK-NEXT: (5,2)
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// CHECK-NEXT: (6,8)
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// CHECK-NEXT: (7,6)
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// CHECK-NEXT: (8,2)
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// CHECK-NEXT: (9,2)
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// CHECK-NEXT: (10,1)
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// CHECK-NEXT: (11,10)
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// CHECK-NEXT: (12,11)
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int test5()
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{
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int x,y,z,a,b,c;
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x = 1;
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y = 2;
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z = 3;
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a = 4;
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b = 5;
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c = 6;
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if ( x < 10 ) {
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if ( y < 10 ) {
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if ( z < 10 ) {
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x = 4;
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} else {
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x = 5;
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}
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a = 10;
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} else {
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x = 6;
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}
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b = 10;
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} else {
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x = 7;
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}
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c = 11;
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return 0;
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}
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// [B0 (EXIT)] <--
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// \
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// [B11 (ENTY)] -> [B10] -> [B9] -> [B8] -> [B7] -> [B5] -> [B3] -> [B1]
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// | | | / / /
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// | | V / / /
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// | V [B6] --> / /
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// V [B4] -----------------> /
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// [B2]--------------------------------->
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// CHECK: Control dependencies (Node#,Dependency#):
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// CHECK-NEXT: (2,10)
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// CHECK-NEXT: (3,10)
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// CHECK-NEXT: (4,9)
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// CHECK-NEXT: (4,10)
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// CHECK-NEXT: (5,9)
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// CHECK-NEXT: (5,10)
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// CHECK-NEXT: (6,8)
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// CHECK-NEXT: (6,9)
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// CHECK-NEXT: (6,10)
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// CHECK-NEXT: (7,8)
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// CHECK-NEXT: (7,9)
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// CHECK-NEXT: (7,10)
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// CHECK-NEXT: (8,9)
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// CHECK-NEXT: (8,10)
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// CHECK-NEXT: (9,10)
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// CHECK-NEXT: Immediate dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,1)
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// CHECK-NEXT: (1,10)
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// CHECK-NEXT: (2,10)
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// CHECK-NEXT: (3,9)
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// CHECK-NEXT: (4,9)
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// CHECK-NEXT: (5,8)
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// CHECK-NEXT: (6,8)
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// CHECK-NEXT: (7,8)
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// CHECK-NEXT: (8,9)
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// CHECK-NEXT: (9,10)
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// CHECK-NEXT: (10,11)
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// CHECK-NEXT: (11,11)
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// CHECK-NEXT: Immediate post dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,0)
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// CHECK-NEXT: (1,0)
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// CHECK-NEXT: (2,1)
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// CHECK-NEXT: (3,1)
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// CHECK-NEXT: (4,3)
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// CHECK-NEXT: (5,3)
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// CHECK-NEXT: (6,5)
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// CHECK-NEXT: (7,5)
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// CHECK-NEXT: (8,5)
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// CHECK-NEXT: (9,3)
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// CHECK-NEXT: (10,1)
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// CHECK-NEXT: (11,10)
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