}
bool StackColoring::runOnMachineFunction(MachineFunction &Func) {
- if (skipFunction(*Func.getFunction()))
- return false;
-
DEBUG(dbgs() << "********** Stack Coloring **********\n"
<< "********** Function: "
<< ((const Value*)Func.getFunction())->getName() << '\n');
// Don't continue because there are not enough lifetime markers, or the
// stack is too small, or we are told not to optimize the slots.
- if (NumMarkers < 2 || TotalSize < 16 || DisableColoring) {
+ if (NumMarkers < 2 || TotalSize < 16 || DisableColoring ||
+ skipFunction(*Func.getFunction())) {
DEBUG(dbgs()<<"Will not try to merge slots.\n");
return removeAllMarkers();
}
; LLC-Ox-DAG: Skipping pass 'Machine Copy Propagation Pass'
; LLC-Ox-DAG: Skipping pass 'Machine Instruction Scheduler'
; LLC-Ox-DAG: Skipping pass 'Machine Loop Invariant Code Motion'
-; LLC-Ox-DAG: Skipping pass 'Merge disjoint stack slots'
; LLC-Ox-DAG: Skipping pass 'Optimize machine instruction PHIs'
; LLC-Ox-DAG: Skipping pass 'Peephole Optimizations'
; LLC-Ox-DAG: Skipping pass 'Post{{.*}}RA{{.*}}{{[Ss]}}cheduler'
bb.false:
ret i32 0
}
+
+; This function is here to verify that opt-bisect can skip all passes for
+; functions that contain lifetime intrinsics.
+define void @f4() {
+entry:
+ %i = alloca i32, align 4
+ %tmp = bitcast i32* %i to i8*
+ call void @llvm.lifetime.start(i64 4, i8* %tmp)
+ br label %for.cond
+
+for.cond:
+ br i1 undef, label %for.body, label %for.end
+
+for.body:
+ br label %for.cond
+
+for.end:
+ ret void
+}
+
+declare void @llvm.lifetime.start(i64, i8* nocapture)
+