clang/test/Analysis/asm-goto.cpp

   1 // RUN: %clang_analyze_cc1 -triple i386-pc-linux-gnu -analyzer-checker=debug.DumpCFG %s 2>&1 | FileCheck %s
   2 // RUN: %clang_analyze_cc1 -triple x86_64-pc-linux-gnu -analyzer-checker=debug.DumpCFG %s 2>&1 | FileCheck %s
   3
   4 int foo(int cond)
   5 {
   6 label_true:
   7   asm goto("testl %0, %0; jne %l1;" :: "r"(cond)::label_true, loop);
   8   return 0;
   9 loop:
  10   return 0;
  11 }
  12
  13 // CHECK-LABEL: loop
  14 // CHECK-NEXT: 0
  15 // CHECK-NEXT: return
  16 // CHECK-NEXT: Preds (1): B3
  17 // CHECK-NEXT: Succs (1): B0
  18
  19 // CHECK-LABEL: label_true
  20 // CHECK-NEXT: cond
  21 // CHECK-NEXT: [B3.1]
  22 // CHECK-NEXT: T: asm goto
  23 // CHECK-NEXT: Preds (2): B3 B4
  24 // CHECK-NEXT: Succs (3): B2 B3 B1
  25
  26 int bar(int cond)
  27 {
  28   asm goto("testl %0, %0; jne %l1;" :: "r"(cond)::L1, L2);
  29   return 0;
  30 L1:
  31 L2:
  32   return 0;
  33 }
  34
  35 // CHECK: [B4]
  36 // CHECK-NEXT: cond
  37 // CHECK-NEXT: [B4.1]
  38 // CHECK-NEXT: T: asm goto
  39 // CHECK-NEXT: Preds (1): B5
  40 // CHECK-NEXT: Succs (3): B3 B2 B1
  41
  42 int zoo(int n)
  43 {
  44 A5:
  45 A1:
  46   asm goto("testl %0, %0; jne %l1;" :: "r"(n)::A1, A2, A3, A4, A5);
  47 A2:
  48 A3:
  49 A4:
  50   return 0;
  51 }
  52
  53 // CHECK-LABEL: A1
  54 // CHECK-NEXT: n
  55 // CHECK-NEXT: [B4.1]
  56 // CHECK-NEXT: T: asm goto
  57 // CHECK-NEXT: Preds (2): B5 B4
  58 // CHECK-NEXT: Succs (5): B3 B4 B2 B1 B5
  59
  60 void baz(void)
  61 {
  62   asm goto("" :: "r"(1 ? 2 : 0 << -1) :: error);
  63 error:;
  64 }
  65
  66 // CHECK: [B2]
  67 // CHECK-NEXT: 1: [B5.2] ? [B3.1] : [B4.4]
  68 // CHECK-NEXT: T: asm goto ("" :  : "r" ([B2.1]) :  : error);
  69 // CHECK-NEXT: Preds (2): B3 B4
  70 // CHECK-NEXT: Succs (1): B1