From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 10 Jul 2007 17:50:43 +0000 (+0000)
Subject: Somehow this wasn't committed last time. M_CLOBBERS_PRED is gone.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=11ce02dbddf4b6629b8537f89d742c98c3c2bce2;p=oota-llvm.git

Somehow this wasn't committed last time. M_CLOBBERS_PRED is gone.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38495 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/IfConversion.cpp b/lib/CodeGen/IfConversion.cpp
index b05f6630ea7..3bddc771ab1 100644
--- a/lib/CodeGen/IfConversion.cpp
+++ b/lib/CodeGen/IfConversion.cpp
@@ -84,7 +84,7 @@ namespace {
     /// IsBrAnalyzable  - True if AnalyzeBranch() returns false.
     /// HasFallThrough  - True if BB may fallthrough to the following BB.
     /// IsUnpredicable  - True if BB is known to be unpredicable.
-    /// ClobbersPredicate- True if BB would modify the predicate (e.g. has
+    /// ClobbersPred    - True if BB could modify predicates (e.g. has
     ///                   cmp, call, etc.)
     /// NonPredSize     - Number of non-predicated instructions.
     /// BB              - Corresponding MachineBasicBlock.
@@ -588,7 +588,10 @@ void IfConverter::ScanInstructions(BBInfo &BBI) {
       return;
     }
 
-    if (TID->Flags & M_CLOBBERS_PRED)
+    // FIXME: Make use of PredDefs? e.g. ADDC, SUBC sets predicates but are
+    // still potentially predicable.
+    std::vector<MachineOperand> PredDefs;
+    if (TII->DefinesPredicate(I, PredDefs))
       BBI.ClobbersPred = true;
 
     if ((TID->Flags & M_PREDICABLE) == 0) {