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1; RUN: llc -mtriple=amdgcn -mcpu=verde < %s | FileCheck %s2 3; Test a simple uniform loop that lives inside non-uniform control flow.4 5; CHECK-LABEL: {{^}}test1:6; CHECK: v_cmp_ne_u32_e32 vcc, 07; CHECK: s_and_saveexec_b648; CHECK-NEXT: s_cbranch_execz .LBB{{[0-9]+_[0-9]+}}9 10; CHECK: [[LOOP_BODY_LABEL:.LBB[0-9]+_[0-9]+]]: ; %loop_body11; CHECK: s_cbranch_scc1 [[LOOP_BODY_LABEL]]12 13; CHECK: s_endpgm14define amdgpu_ps void @test1(<8 x i32> inreg %rsrc, <2 x i32> %addr.base, i32 %y, i32 %p) {15main_body:16 %cc = icmp eq i32 %p, 017 br i1 %cc, label %out, label %loop_body18 19loop_body:20 %counter = phi i32 [ 0, %main_body ], [ %incr, %loop_body ]21 22 ; Prevent the loop from being optimized out23 call void asm sideeffect "", "" ()24 25 %incr = add i32 %counter, 126 %lc = icmp sge i32 %incr, 100027 br i1 %lc, label %out, label %loop_body28 29out:30 ret void31}32 33; CHECK-LABEL: {{^}}test2:34; CHECK: s_and_saveexec_b6435; CHECK-NEXT: s_cbranch_execz36define amdgpu_kernel void @test2(ptr addrspace(1) %out, i32 %a, i32 %b) {37main_body:38 %tid = call i32 @llvm.amdgcn.workitem.id.x() #139 %cc = icmp eq i32 %tid, 040 br i1 %cc, label %done1, label %if41 42if:43 %cmp = icmp eq i32 %a, 044 br i1 %cmp, label %done0, label %loop_body45 46loop_body:47 %counter = phi i32 [ 0, %if ], [0, %done0], [ %incr, %loop_body ]48 49 ; Prevent the loop from being optimized out50 call void asm sideeffect "", "" ()51 52 %incr = add i32 %counter, 153 %lc = icmp sge i32 %incr, 100054 br i1 %lc, label %done1, label %loop_body55 56done0:57 %cmp0 = icmp eq i32 %b, 058 br i1 %cmp0, label %done1, label %loop_body59 60done1:61 ret void62}63 64declare i32 @llvm.amdgcn.workitem.id.x() #165 66attributes #1 = { nounwind readonly }67