clang/test/CodeGen/no-junk-ftrunc.c

   1 // RUN: %clang_cc1 -fno-strict-float-cast-overflow %s -emit-llvm -o - | FileCheck %s --check-prefix=NOSTRICT
   2
   3 // When compiling with non-standard semantics, use intrinsics to inhibit the optimizer.
   4 // This used to require a function attribute, so we check that it is NOT here anymore.
   5
   6 // NOSTRICT-LABEL: main
   7 // NOSTRICT: call i32 @llvm.fptosi.sat.i32.f64
   8 // NOSTRICT: call i32 @llvm.fptoui.sat.i32.f64
   9 // NOSTRICT-NOT: strict-float-cast-overflow
  10
  11 // The workaround attribute is not applied by default.
  12
  13 // RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s --check-prefix=STRICT
  14 // STRICT-LABEL: main
  15 // STRICT: = fptosi
  16 // STRICT: = fptoui
  17 // STRICT-NOT: strict-float-cast-overflow
  18
  19
  20 int main(void) {
  21   double d = 1e20;
  22   return (int)d != 1e20 && (unsigned)d != 1e20;
  23 }