clang/test/CodeGen/mips-unsupported-nan.c

   1 // RUN: %clang -target mipsel-unknown-linux -mnan=2008 -march=mips2 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NANLEGACY %s
   2 // RUN: FileCheck -check-prefix=CHECK-MIPS2 %s < %t
   3 //
   4 // RUN: %clang -target mips64el-unknown-linux -mnan=2008 -march=mips3 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NANLEGACY %s
   5 // RUN: FileCheck -check-prefix=CHECK-MIPS3 %s < %t
   6 //
   7 // RUN: %clang -target mips64el-unknown-linux -mnan=2008 -march=mips4 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NANLEGACY %s
   8 // RUN: FileCheck -check-prefix=CHECK-MIPS4 %s < %t
   9 //
  10 // RUN: %clang -target mipsel-unknown-linux -mnan=2008 -march=mips32 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NANLEGACY %s
  11 // RUN: FileCheck -check-prefix=CHECK-MIPS32 %s < %t
  12 //
  13 // RUN: %clang -target mipsel-unknown-linux -mnan=2008 -march=mips32r2 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NAN2008 %s
  14 // RUN: FileCheck -allow-empty -check-prefix=NO-WARNINGS %s < %t
  15 //
  16 // RUN: %clang -target mipsel-unknown-linux -mnan=2008 -march=mips32r3 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NAN2008 %s
  17 // RUN: FileCheck -allow-empty -check-prefix=NO-WARNINGS %s < %t
  18 //
  19 // RUN: %clang -target mipsel-unknown-linux -mnan=legacy -march=mips32r6 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NAN2008 %s
  20 // RUN: FileCheck -check-prefix=CHECK-MIPS32R6 %s < %t
  21 //
  22 // RUN: %clang -target mips64el-unknown-linux -mnan=2008 -march=mips64 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NANLEGACY %s
  23 // RUN: FileCheck -check-prefix=CHECK-MIPS64 %s < %t
  24 //
  25 // RUN: %clang -target mips64el-unknown-linux -mnan=2008 -march=mips64r2 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NAN2008 %s
  26 // RUN: FileCheck -allow-empty -check-prefix=NO-WARNINGS %s < %t
  27 //
  28 // RUN: %clang -target mips64el-unknown-linux -mnan=legacy -march=mips64r6 -emit-llvm -S %s -o - 2>%t | FileCheck -check-prefix=CHECK-NAN2008 %s
  29 // RUN: FileCheck -check-prefix=CHECK-MIPS64R6 %s < %t
  30
  31 // NO-WARNINGS-NOT: warning: ignoring '-mnan=legacy' option
  32 // NO-WARNINGS-NOT: warning: ignoring '-mnan=2008' option
  33
  34 // CHECK-MIPS2: warning: ignoring '-mnan=2008' option because the 'mips2' architecture does not support it
  35 // CHECK-MIPS3: warning: ignoring '-mnan=2008' option because the 'mips3' architecture does not support it
  36 // CHECK-MIPS4: warning: ignoring '-mnan=2008' option because the 'mips4' architecture does not support it
  37 // CHECK-MIPS32: warning: ignoring '-mnan=2008' option because the 'mips32' architecture does not support it
  38 // CHECK-MIPS32R6: warning: ignoring '-mnan=legacy' option because the 'mips32r6' architecture does not support it
  39 // CHECK-MIPS64: warning: ignoring '-mnan=2008' option because the 'mips64' architecture does not support it
  40 // CHECK-MIPS64R6: warning: ignoring '-mnan=legacy' option because the 'mips64r6' architecture does not support it
  41
  42 // This call creates a QNAN double with an empty payload.
  43 // The quiet bit is inverted in legacy mode: it is clear to indicate QNAN,
  44 // so the next highest bit is set to maintain NAN (not infinity).
  45 // In regular (2008) mode, the quiet bit is set to indicate QNAN.
  46
  47 // CHECK-NANLEGACY: double 0x7FF4000000000000
  48 // CHECK-NAN2008: double 0x7FF8000000000000
  49
  50 double d =  __builtin_nan("");
  51
  52 // This call creates a QNAN double with an empty payload and then truncates.
  53 // llvm::APFloat does not know about the inverted quiet bit, so it sets the
  54 // quiet bit on conversion independently of the setting in clang.
  55
  56 // CHECK-NANLEGACY: float 0x7FFC000000000000
  57 // CHECK-NAN2008: float 0x7FF8000000000000
  58
  59 float f =  __builtin_nan("");