tree f436ce230748694b8755a4281edc9faf481a25b0
parent 3d2313ef5de46228b157b1f1f6e306812dae3942
author Chris Lattner <sabre@nondot.org> 1190487853 +0000
committer Chris Lattner <sabre@nondot.org> 1190487853 +0000

Use the APFloat routines to evaluate FP immediates as 
integer constant expressions.  The only questionable
thing is that we now reject:

void foo() {
  switch (1) {
  case (int)1.0e10000:
    ;
  }
}

with:

t.c:5:13: error: case label does not reduce to an integer constant
  case (int)1.0e10000:
       ~~~~~^~~~~~~~~

GCC accepts this, emitting the pedwarn:
t.c:5: warning: floating constant exceeds range of 'double'


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42238 91177308-0d34-0410-b5e6-96231b3b80d8