[x86] Assert on invalid immediates in the instruction printer for cmp.ps/pd/ss/sd instead of truncating the immediate. The assembly parser and instruction selection shouldn't generate invalid immediates.

llvm-svn: 224886

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/Target/X86/InstPrinter/X86IntelInstPrinter.cpp b/llvm/lib/Target/X86/InstPrinter/X86IntelInstPrinter.cpp
index f5fd9845d90..449445df7d2 100644
--- a/llvm/lib/Target/X86/InstPrinter/X86IntelInstPrinter.cpp
+++ b/llvm/lib/Target/X86/InstPrinter/X86IntelInstPrinter.cpp
@@ -90,13 +90,15 @@ static void printSSEAVXCC(int64_t Imm, raw_ostream &O) {
 
 void X86IntelInstPrinter::printSSECC(const MCInst *MI, unsigned Op,
                                      raw_ostream &O) {
-  int64_t Imm = MI->getOperand(Op).getImm() & 0x7;
+  int64_t Imm = MI->getOperand(Op).getImm();
+  assert((Imm & 0x7) == Imm); // Ensure valid immediate.
   printSSEAVXCC(Imm, O);
 }
 
 void X86IntelInstPrinter::printAVXCC(const MCInst *MI, unsigned Op,
                                      raw_ostream &O) {
-  int64_t Imm = MI->getOperand(Op).getImm() & 0x1f;
+  int64_t Imm = MI->getOperand(Op).getImm();
+  assert((Imm & 0x1f) == Imm); // Ensure valid immediate.
   printSSEAVXCC(Imm, O);
 }