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bf9d9a1180
Previously this would default to 256, not the maximum supported size of 1024. Using a maximum lower than the hardware maximum requires language runtimes to enforce this limit for correctness, which no language has correctly done. Switch the default to the conservatively correct maximum, and force frontends to opt-in to the more optimal 256 default maximum. I don't really understand why the changes in occupancy-levels.ll increased the computed occupancy, which I expected to decrease. I'm not sure if these tests should be forcing the old maximum.
68 lines
3.5 KiB
LLVM
68 lines
3.5 KiB
LLVM
; RUN: opt -S -mtriple=amdgcn-unknown-amdhsa -mcpu=kaveri -amdgpu-promote-alloca < %s | FileCheck %s
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; RUN: opt -S -mtriple=amdgcn-unknown-amdhsa -mcpu=kaveri -amdgpu-promote-alloca -disable-promote-alloca-to-lds< %s | FileCheck -check-prefix=NOLDS %s
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; This normally would be fixed by instcombine to be compare to the GEP
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; indices
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; NOLDS-NOT: addrspace(3)
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; CHECK-LABEL: @lds_promoted_alloca_icmp_same_derived_pointer(
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; CHECK: [[ARRAYGEP:%[0-9]+]] = getelementptr inbounds [256 x [16 x i32]], [256 x [16 x i32]] addrspace(3)* @lds_promoted_alloca_icmp_same_derived_pointer.alloca, i32 0, i32 %{{[0-9]+}}
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; CHECK: %ptr0 = getelementptr inbounds [16 x i32], [16 x i32] addrspace(3)* [[ARRAYGEP]], i32 0, i32 %a
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; CHECK: %ptr1 = getelementptr inbounds [16 x i32], [16 x i32] addrspace(3)* [[ARRAYGEP]], i32 0, i32 %b
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; CHECK: %cmp = icmp eq i32 addrspace(3)* %ptr0, %ptr1
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define amdgpu_kernel void @lds_promoted_alloca_icmp_same_derived_pointer(i32 addrspace(1)* %out, i32 %a, i32 %b) #0 {
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%alloca = alloca [16 x i32], align 4
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%ptr0 = getelementptr inbounds [16 x i32], [16 x i32]* %alloca, i32 0, i32 %a
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%ptr1 = getelementptr inbounds [16 x i32], [16 x i32]* %alloca, i32 0, i32 %b
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%cmp = icmp eq i32* %ptr0, %ptr1
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%zext = zext i1 %cmp to i32
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store volatile i32 %zext, i32 addrspace(1)* %out
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ret void
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}
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; CHECK-LABEL: @lds_promoted_alloca_icmp_null_rhs(
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; CHECK: [[ARRAYGEP:%[0-9]+]] = getelementptr inbounds [256 x [16 x i32]], [256 x [16 x i32]] addrspace(3)* @lds_promoted_alloca_icmp_null_rhs.alloca, i32 0, i32 %{{[0-9]+}}
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; CHECK: %ptr0 = getelementptr inbounds [16 x i32], [16 x i32] addrspace(3)* [[ARRAYGEP]], i32 0, i32 %a
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; CHECK: %cmp = icmp eq i32 addrspace(3)* %ptr0, null
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define amdgpu_kernel void @lds_promoted_alloca_icmp_null_rhs(i32 addrspace(1)* %out, i32 %a, i32 %b) #0 {
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%alloca = alloca [16 x i32], align 4
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%ptr0 = getelementptr inbounds [16 x i32], [16 x i32]* %alloca, i32 0, i32 %a
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%cmp = icmp eq i32* %ptr0, null
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%zext = zext i1 %cmp to i32
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store volatile i32 %zext, i32 addrspace(1)* %out
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ret void
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}
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; CHECK-LABEL: @lds_promoted_alloca_icmp_null_lhs(
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; CHECK: [[ARRAYGEP:%[0-9]+]] = getelementptr inbounds [256 x [16 x i32]], [256 x [16 x i32]] addrspace(3)* @lds_promoted_alloca_icmp_null_lhs.alloca, i32 0, i32 %{{[0-9]+}}
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; CHECK: %ptr0 = getelementptr inbounds [16 x i32], [16 x i32] addrspace(3)* [[ARRAYGEP]], i32 0, i32 %a
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; CHECK: %cmp = icmp eq i32 addrspace(3)* null, %ptr0
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define amdgpu_kernel void @lds_promoted_alloca_icmp_null_lhs(i32 addrspace(1)* %out, i32 %a, i32 %b) #0 {
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%alloca = alloca [16 x i32], align 4
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%ptr0 = getelementptr inbounds [16 x i32], [16 x i32]* %alloca, i32 0, i32 %a
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%cmp = icmp eq i32* null, %ptr0
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%zext = zext i1 %cmp to i32
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store volatile i32 %zext, i32 addrspace(1)* %out
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ret void
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}
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; CHECK-LABEL: @lds_promoted_alloca_icmp_unknown_ptr(
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; CHECK: %alloca = alloca [16 x i32], align 4
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; CHECK: %ptr0 = getelementptr inbounds [16 x i32], [16 x i32]* %alloca, i32 0, i32 %a
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; CHECK: %ptr1 = call i32* @get_unknown_pointer()
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; CHECK: %cmp = icmp eq i32* %ptr0, %ptr1
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define amdgpu_kernel void @lds_promoted_alloca_icmp_unknown_ptr(i32 addrspace(1)* %out, i32 %a, i32 %b) #0 {
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%alloca = alloca [16 x i32], align 4
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%ptr0 = getelementptr inbounds [16 x i32], [16 x i32]* %alloca, i32 0, i32 %a
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%ptr1 = call i32* @get_unknown_pointer()
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%cmp = icmp eq i32* %ptr0, %ptr1
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%zext = zext i1 %cmp to i32
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store volatile i32 %zext, i32 addrspace(1)* %out
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ret void
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}
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declare i32* @get_unknown_pointer() #0
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attributes #0 = { nounwind "amdgpu-waves-per-eu"="1,1" "amdgpu-flat-work-group-size"="1,256" }
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