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7f678be718
Symmary: ds_permute/ds_bpermute do not read memory so s_waitcnt is not needed. Reviewers arsenm, tstellarAMD Subscribers llvm-commits, arsenm Differential Revision: http://reviews.llvm.org/D18197 llvm-svn: 263720
38 lines
1.2 KiB
LLVM
38 lines
1.2 KiB
LLVM
; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=fiji -verify-machineinstrs < %s | FileCheck %s
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declare i32 @llvm.amdgcn.ds.bpermute(i32, i32) #0
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; FUNC-LABEL: {{^}}ds_bpermute:
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; CHECK: ds_bpermute_b32 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
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define void @ds_bpermute(i32 addrspace(1)* %out, i32 %index, i32 %src) nounwind {
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%bpermute = call i32 @llvm.amdgcn.ds.bpermute(i32 %index, i32 %src) #0
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store i32 %bpermute, i32 addrspace(1)* %out, align 4
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ret void
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}
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; FUNC-LABEL: {{^}}bpermute_no_waitcnt_test:
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; CHECK: s_cbranch_scc1
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; CHECK: ds_bpermute_b32 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
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; CHECK-NOT: s_waitcnt
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define void @bpermute_no_waitcnt_test(i32 addrspace(1)* %out, i32 %cond) {
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entry:
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%tmp = icmp eq i32 %cond, 0
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br i1 %tmp, label %if, label %else
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if: ; preds = %entry
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%bpermute = call i32 @llvm.amdgcn.ds.bpermute(i32 0, i32 0) #0
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br label %endif
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else: ; preds = %entry
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br label %endif
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endif:
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%val = phi i32 [ %bpermute, %if ], [0, %else] ; preds = %else, %if
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store i32 %val, i32 addrspace(1)* %out, align 4
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ret void
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}
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attributes #0 = { nounwind readnone convergent }
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