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