57 lines
1.7 KiB
LLVM
57 lines
1.7 KiB
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
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declare i1 @llvm.amdgcn.class.f32(float, i32)
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; Produces error after adding an implicit def to v_cndmask_b32
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; GCN-LABEL: {{^}}vcc_shrink_vcc_def:
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; GCN: v_cmp_eq_i32_e64 vcc, 0, s{{[0-9]+}}
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; GCN: v_cndmask_b32_e32 v{{[0-9]+}}, 1.0, v{{[0-9]+}}, vcc
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; GCN: v_cndmask_b32_e64 v1, 0, 1, s{{\[[0-9]+:[0-9]+\]}}
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define void @vcc_shrink_vcc_def(float %arg, i32 %arg1, float %arg2, i32 %arg3) {
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bb0:
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%tmp = icmp sgt i32 %arg1, 4
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%c = icmp eq i32 %arg3, 0
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%tmp4 = select i1 %c, float %arg, float 1.000000e+00
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%tmp5 = fcmp ogt float %arg2, 0.000000e+00
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%tmp6 = fcmp olt float %arg2, 1.000000e+00
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%tmp7 = fcmp olt float %arg, %tmp4
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%tmp8 = and i1 %tmp5, %tmp6
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%tmp9 = and i1 %tmp8, %tmp7
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br i1 %tmp9, label %bb1, label %bb2
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bb1:
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store volatile i32 0, i32 addrspace(1)* undef
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br label %bb2
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bb2:
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ret void
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}
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; The undef flag on the condition src must be preserved on the
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; implicit vcc use to avoid verifier errors.
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; GCN-LABEL: {{^}}preserve_condition_undef_flag:
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; GCN-NOT: vcc
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; GCN: v_cndmask_b32_e32 v{{[0-9]+}}, 1.0, v{{[0-9]+}}, vcc
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; GCN: v_cndmask_b32_e64 v1, 0, 1, s{{\[[0-9]+:[0-9]+\]}}
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define void @preserve_condition_undef_flag(float %arg, i32 %arg1, float %arg2) {
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bb0:
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%tmp = icmp sgt i32 %arg1, 4
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%undef = call i1 @llvm.amdgcn.class.f32(float undef, i32 undef)
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%tmp4 = select i1 %undef, float %arg, float 1.000000e+00
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%tmp5 = fcmp ogt float %arg2, 0.000000e+00
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%tmp6 = fcmp olt float %arg2, 1.000000e+00
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%tmp7 = fcmp olt float %arg, %tmp4
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%tmp8 = and i1 %tmp5, %tmp6
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%tmp9 = and i1 %tmp8, %tmp7
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br i1 %tmp9, label %bb1, label %bb2
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bb1:
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store volatile i32 0, i32 addrspace(1)* undef
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br label %bb2
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bb2:
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ret void
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}
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