; RUN: opt -mtriple=amdgcn-- -passes='loop-unroll,simplifycfg,sroa' %s -S -o - | FileCheck %s
; RUN: opt -mtriple=r600-- -passes='loop-unroll,simplifycfg,sroa' %s -S -o - | FileCheck %s
target datalayout = "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-p7:160:256:256:32-p8:128:128-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5"
; This test contains a simple loop that initializes an array declared in
; private memory. We want to make sure these kinds of loops are always
; unrolled, because private memory is slow.
; CHECK-LABEL: @private_memory
; CHECK-NOT: alloca
; CHECK: store i32 5, ptr addrspace(1) %out
define amdgpu_kernel void @private_memory(ptr addrspace(1) %out) {
entry:
%0 = alloca [32 x i32], addrspace(5)
br label %loop.header
loop.header:
%counter = phi i32 [0, %entry], [%inc, %loop.inc]
br label %loop.body
loop.body:
%ptr = getelementptr [32 x i32], ptr addrspace(5) %0, i32 0, i32 %counter
store i32 %counter, ptr addrspace(5) %ptr
br label %loop.inc
loop.inc:
%inc = add i32 %counter, 1
%1 = icmp sge i32 %counter, 32
br i1 %1, label %exit, label %loop.header
exit:
%2 = getelementptr [32 x i32], ptr addrspace(5) %0, i32 0, i32 5
%3 = load i32, ptr addrspace(5) %2
store i32 %3, ptr addrspace(1) %out
ret void
}
; Check that loop is unrolled for local memory references
; CHECK-LABEL: @local_memory
; CHECK: getelementptr i32, ptr addrspace(1) %out, i32 128
; CHECK-NEXT: store
; CHECK-NEXT: ret
define amdgpu_kernel void @local_memory(ptr addrspace(1) %out, ptr addrspace(3) %lds) {
entry:
br label %loop.header
loop.header:
%counter = phi i32 [0, %entry], [%inc, %loop.inc]
br label %loop.body
loop.body:
%ptr_lds = getelementptr i32, ptr addrspace(3) %lds, i32 %counter
%val = load i32, ptr addrspace(3) %ptr_lds
%ptr_out = getelementptr i32, ptr addrspace(1) %out, i32 %counter
store i32 %val, ptr addrspace(1) %ptr_out
br label %loop.inc
loop.inc:
%inc = add i32 %counter, 1
%cond = icmp sge i32 %counter, 128
br i1 %cond, label %exit, label %loop.header
exit:
ret void
}
; Check that a loop with if inside completely unrolled to eliminate phi and if
; CHECK-LABEL: @unroll_for_if
; CHECK: entry:
; CHECK-NEXT: getelementptr
; CHECK-NEXT: store
; CHECK-NEXT: getelementptr
; CHECK-NEXT: store
; CHECK-NOT: br
define amdgpu_kernel void @unroll_for_if(ptr addrspace(5) %a) {
entry:
br label %for.body
for.body: ; preds = %entry, %for.inc
%i1 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%tobool = icmp eq i32 %i1, 0
br i1 %tobool, label %for.inc, label %if.then
if.then: ; preds = %for.body
%0 = sext i32 %i1 to i64
%arrayidx = getelementptr inbounds i32, ptr addrspace(5) %a, i64 %0
store i32 0, ptr addrspace(5) %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body, %if.then
%inc = add nuw nsw i32 %i1, 1
%cmp = icmp ult i32 %inc, 38
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.cond
ret void
}
; Check that runtime unroll is enabled for local memory references
; CHECK-LABEL: @local_memory_runtime
; CHECK: loop.header:
; CHECK: load i32, ptr addrspace(3)
; CHECK: load i32, ptr addrspace(3)
; CHECK: br i1
; CHECK: loop.header.epil
; CHECK: load i32, ptr addrspace(3)
; CHECK: ret
define amdgpu_kernel void @local_memory_runtime(ptr addrspace(1) %out, ptr addrspace(3) %lds, i32 %n) {
entry:
br label %loop.header
loop.header:
%counter = phi i32 [0, %entry], [%inc, %loop.inc]
br label %loop.body
loop.body:
%ptr_lds = getelementptr i32, ptr addrspace(3) %lds, i32 %counter
%val = load i32, ptr addrspace(3) %ptr_lds
%ptr_out = getelementptr i32, ptr addrspace(1) %out, i32 %counter
store i32 %val, ptr addrspace(1) %ptr_out
br label %loop.inc
loop.inc:
%inc = add i32 %counter, 1
%cond = icmp sge i32 %counter, %n
br i1 %cond, label %exit, label %loop.header
exit:
ret void
}
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