forked from OSchip/llvm-project
48 lines
1.5 KiB
LLVM
48 lines
1.5 KiB
LLVM
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; RUN: opt -mtriple=amdgcn-- -O1 -S < %s | FileCheck %s --check-prefixes=FUNC,LOOP
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; RUN: opt -mtriple=amdgcn-- -O1 -S -disable-promote-alloca-to-vector < %s | FileCheck %s --check-prefixes=FUNC,FULL-UNROLL
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target datalayout = "A5"
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; This test contains a simple loop that initializes an array declared in
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; private memory. This loop would be fully unrolled if we could not SROA
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; the alloca. Check that we successfully eliminate it before the unroll,
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; so that we do not need to fully unroll it.
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; FUNC-LABEL: @private_memory
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; LOOP-NOT: alloca
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; LOOP: loop.header:
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; LOOP: br i1 %{{[^,]+}}, label %exit, label %loop.header
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; FULL-UNROLL: alloca
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; FULL-UNROLL-COUNT-256: store i32 {{[0-9]+}}, i32 addrspace(5)*
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; FULL-UNROLL-NOT: br
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; FUNC: store i32 %{{[^,]+}}, i32 addrspace(1)* %out
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define amdgpu_kernel void @private_memory(i32 addrspace(1)* %out, i32 %n) {
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entry:
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%alloca = alloca [16 x i32], addrspace(5)
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br label %loop.header
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loop.header:
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%counter = phi i32 [0, %entry], [%inc, %loop.inc]
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br label %loop.body
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loop.body:
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%salt = xor i32 %counter, %n
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%idx = and i32 %salt, 15
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%ptr = getelementptr [16 x i32], [16 x i32] addrspace(5)* %alloca, i32 0, i32 %idx
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store i32 %counter, i32 addrspace(5)* %ptr
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br label %loop.inc
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loop.inc:
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%inc = add i32 %counter, 1
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%cmp = icmp sge i32 %counter, 255
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br i1 %cmp, label %exit, label %loop.header
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exit:
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%gep = getelementptr [16 x i32], [16 x i32] addrspace(5)* %alloca, i32 0, i32 %n
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%load = load i32, i32 addrspace(5)* %gep
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store i32 %load, i32 addrspace(1)* %out
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ret void
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}
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