unsigned NumInstr = 0;
- for (MachineBasicBlock *MBB = From; MBB != To && !MBB->succ_empty();
- MBB = *MBB->succ_begin()) {
+ for (MachineFunction::iterator MBBI = MachineFunction::iterator(From),
+ ToI = MachineFunction::iterator(To); MBBI != ToI; ++MBBI) {
- for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
+ MachineBasicBlock &MBB = *MBBI;
+
+ for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end();
NumInstr < SkipThreshold && I != E; ++I) {
if (I->isBundle() || !I->isBundled()) {
ret void
}
+;CHECK-LABEL: {{^}}test2:
+;CHECK: s_and_saveexec_b64
+;CHECK: s_xor_b64
+;CHECK-NEXT: s_cbranch_execz
+define void @test2(i32 addrspace(1)* %out, i32 %a, i32 %b) {
+main_body:
+ %tid = call i32 @llvm.amdgcn.workitem.id.x() #1
+ %cc = icmp eq i32 %tid, 0
+ br i1 %cc, label %done1, label %if
+
+if:
+ %cmp = icmp eq i32 %a, 0
+ br i1 %cmp, label %done0, label %loop_body
+
+loop_body:
+ %counter = phi i32 [ 0, %if ], [0, %done0], [ %incr, %loop_body ]
+
+ ; Prevent the loop from being optimized out
+ call void asm sideeffect "", "" ()
+
+ %incr = add i32 %counter, 1
+ %lc = icmp sge i32 %incr, 1000
+ br i1 %lc, label %done1, label %loop_body
+
+done0:
+ %cmp0 = icmp eq i32 %b, 0
+ br i1 %cmp0, label %done1, label %loop_body
+
+done1:
+ ret void
+}
+
+declare i32 @llvm.amdgcn.workitem.id.x() #1
+
attributes #0 = { "ShaderType"="0" }
attributes #1 = { nounwind readonly }