Do not assign new discriminator for all intrinsics.

Summary: We do not care about intrinsic calls when assigning discriminators.

Reviewers: davidxl, dnovillo

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D23212

llvm-svn: 277843

llvm/lib/Transforms/Utils/AddDiscriminators.cpp

@@ -184,7 +184,7 @@ static bool addDiscriminators(Function &F) {
   // discriminator for this instruction.
   for (BasicBlock &B : F) {
     for (auto &I : B.getInstList()) {
-      if (isa<DbgInfoIntrinsic>(&I))
+      if (isa<IntrinsicInst>(&I))
         continue;
       const DILocation *DIL = I.getDebugLoc();
       if (!DIL)
@@ -222,7 +222,7 @@ static bool addDiscriminators(Function &F) {
     LocationSet CallLocations;
     for (auto &I : B.getInstList()) {
       CallInst *Current = dyn_cast<CallInst>(&I);
-      if (!Current || isa<DbgInfoIntrinsic>(&I))
+      if (!Current || isa<IntrinsicInst>(&I))
         continue;
 
       DILocation *CurrentDIL = Current->getDebugLoc();

llvm/test/Transforms/AddDiscriminators/call.ll

@@ -12,6 +12,10 @@
 define void @_Z3foov() #0 !dbg !4 {
   call void @_Z3barv(), !dbg !10
 ; CHECK:  call void @_Z3barv(), !dbg ![[CALL0:[0-9]+]]
+  %a = alloca [100 x i8], align 16
+  %b = bitcast [100 x i8]* %a to i8*
+  call void @llvm.lifetime.start(i64 100, i8* %b), !dbg !11
+  call void @llvm.lifetime.end(i64 100, i8* %b), !dbg !11
   call void @_Z3barv(), !dbg !11
 ; CHECK:  call void @_Z3barv(), !dbg ![[CALL1:[0-9]+]]
   call void @_Z3barv(), !dbg !12
@@ -20,6 +24,8 @@ define void @_Z3foov() #0 !dbg !4 {
 }
 
 declare void @_Z3barv() #1
+declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind argmemonly
+declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind argmemonly
 
 attributes #0 = { uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
 attributes #1 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }