Fix to make the CBE always emit comparisons inline. Hopefully this will
fix the really bad code we're getting on PPC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13609 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index ae3ba80..6e536f0 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -126,6 +126,10 @@
// printed and an extra copy of the expr is not emitted.
//
static bool isInlinableInst(const Instruction &I) {
+ // Always inline setcc instructions, even if they are shared by multiple
+ // expressions. GCC generates horrible code if we don't.
+ if (isa<SetCondInst>(I)) return true;
+
// Must be an expression, must be used exactly once. If it is dead, we
// emit it inline where it would go.
if (I.getType() == Type::VoidTy || !I.hasOneUse() ||