| ; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s |
| |
| ; GCN-LABEL: {{^}}test_dont_clobber_scc: |
| |
| ; GCN: ; %entry |
| ; GCN: s_cmp_eq_u32 s0, 0 |
| ; GCN: s_cbranch_scc1 [[PREEXIT:BB[0-9_]+]] |
| |
| ; GCN: ; %blocka |
| ; GCN: s_cmp_eq_u32 s1, 0 |
| ; GCN: s_cbranch_scc1 [[EXIT:BB[0-9_]+]] |
| |
| ; GCN: [[PREEXIT]]: |
| ; GCN: [[EXIT]]: |
| |
| define amdgpu_vs float @test_dont_clobber_scc(i32 inreg %uni, i32 inreg %uni2) #0 { |
| entry: |
| %cc.uni = icmp eq i32 %uni, 0 |
| br i1 %cc.uni, label %exit, label %blocka |
| |
| blocka: |
| call void asm sideeffect "; dummy a", ""() |
| %cc.uni2 = icmp eq i32 %uni2, 0 |
| br i1 %cc.uni2, label %exit, label %blockb |
| |
| blockb: |
| call void asm sideeffect "; dummy b", ""() |
| br label %exit |
| |
| exit: |
| %cc.phi = phi i1 [ true, %entry ], [ false, %blocka ], [ false, %blockb ] |
| call void asm sideeffect "; dummy exit", ""() |
| %r = select i1 %cc.phi, float 1.0, float 2.0 |
| ret float %r |
| } |
| |
| attributes #0 = { nounwind } |