47 lines
1.7 KiB
LLVM
47 lines
1.7 KiB
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs -disable-block-placement < %s | FileCheck %s
|
|
|
|
; Check that invariant compare is hoisted out of the loop.
|
|
; At the same time condition shall not be serialized into a VGPR and deserialized later
|
|
; using another v_cmp + v_cndmask, but used directly in s_and_saveexec_b64.
|
|
|
|
; CHECK: v_cmp_{{..}}_u32_e{{32|64}} [[COND:s\[[0-9]+:[0-9]+\]|vcc]]
|
|
; CHECK: BB0_1:
|
|
; CHECK-NOT: v_cmp
|
|
; CHECK_NOT: v_cndmask
|
|
; CHECK: s_and_saveexec_b64 s[{{[[0-9]+:[0-9]+}}], [[COND]]
|
|
; CHECK: ; %bb.2:
|
|
|
|
define amdgpu_kernel void @hoist_cond(float addrspace(1)* nocapture %arg, float addrspace(1)* noalias nocapture readonly %arg1, i32 %arg3, i32 %arg4) {
|
|
bb:
|
|
%tmp = tail call i32 @llvm.amdgcn.workitem.id.x() #0
|
|
%tmp5 = icmp ult i32 %tmp, %arg3
|
|
br label %bb1
|
|
|
|
bb1: ; preds = %bb3, %bb
|
|
%tmp7 = phi i32 [ %arg4, %bb ], [ %tmp16, %bb3 ]
|
|
%tmp8 = phi float [ 0.000000e+00, %bb ], [ %tmp15, %bb3 ]
|
|
br i1 %tmp5, label %bb2, label %bb3
|
|
|
|
bb2: ; preds = %bb1
|
|
%tmp10 = zext i32 %tmp7 to i64
|
|
%tmp11 = getelementptr inbounds float, float addrspace(1)* %arg1, i64 %tmp10
|
|
%tmp12 = load float, float addrspace(1)* %tmp11, align 4
|
|
br label %bb3
|
|
|
|
bb3: ; preds = %bb2, %bb1
|
|
%tmp14 = phi float [ %tmp12, %bb2 ], [ 0.000000e+00, %bb1 ]
|
|
%tmp15 = fadd float %tmp8, %tmp14
|
|
%tmp16 = add i32 %tmp7, -1
|
|
%tmp17 = icmp eq i32 %tmp16, 0
|
|
br i1 %tmp17, label %bb4, label %bb1
|
|
|
|
bb4: ; preds = %bb3
|
|
store float %tmp15, float addrspace(1)* %arg, align 4
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind readnone
|
|
declare i32 @llvm.amdgcn.workitem.id.x() #0
|
|
|
|
attributes #0 = { nounwind readnone }
|