blocks.ll
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; RUN: opt -arm-parallel-dsp -dce -mtriple=armv7-a -S %s -o - | FileCheck %s
; CHECK-LABEL: single_block
; CHECK: [[CAST_A:%[^ ]+]] = bitcast i16* %a to i32*
; CHECK: [[A:%[^ ]+]] = load i32, i32* [[CAST_A]]
; CHECK: [[CAST_B:%[^ ]+]] = bitcast i16* %b to i32*
; CHECK: [[B:%[^ ]+]] = load i32, i32* [[CAST_B]]
; CHECK: call i32 @llvm.arm.smlad(i32 [[A]], i32 [[B]], i32 %acc)
define i32 @single_block(i16* %a, i16* %b, i32 %acc) {
entry:
%ld.a.0 = load i16, i16* %a
%sext.a.0 = sext i16 %ld.a.0 to i32
%ld.b.0 = load i16, i16* %b
%sext.b.0 = sext i16 %ld.b.0 to i32
%mul.0 = mul i32 %sext.a.0, %sext.b.0
%addr.a.1 = getelementptr i16, i16* %a, i32 1
%addr.b.1 = getelementptr i16, i16* %b, i32 1
%ld.a.1 = load i16, i16* %addr.a.1
%sext.a.1 = sext i16 %ld.a.1 to i32
%ld.b.1 = load i16, i16* %addr.b.1
%sext.b.1 = sext i16 %ld.b.1 to i32
%mul.1 = mul i32 %sext.a.1, %sext.b.1
%add = add i32 %mul.0, %mul.1
%res = add i32 %add, %acc
ret i32 %res
}
; CHECK-LABEL: single_block_64
; CHECK: [[CAST_A:%[^ ]+]] = bitcast i16* %a to i32*
; CHECK: [[A:%[^ ]+]] = load i32, i32* [[CAST_A]]
; CHECK: [[CAST_B:%[^ ]+]] = bitcast i16* %b to i32*
; CHECK: [[B:%[^ ]+]] = load i32, i32* [[CAST_B]]
; CHECK: call i64 @llvm.arm.smlald(i32 [[A]], i32 [[B]], i64 %acc)
define i64 @single_block_64(i16* %a, i16* %b, i64 %acc) {
entry:
%ld.a.0 = load i16, i16* %a
%sext.a.0 = sext i16 %ld.a.0 to i32
%ld.b.0 = load i16, i16* %b
%sext.b.0 = sext i16 %ld.b.0 to i32
%mul.0 = mul i32 %sext.a.0, %sext.b.0
%addr.a.1 = getelementptr i16, i16* %a, i32 1
%addr.b.1 = getelementptr i16, i16* %b, i32 1
%ld.a.1 = load i16, i16* %addr.a.1
%sext.a.1 = sext i16 %ld.a.1 to i32
%ld.b.1 = load i16, i16* %addr.b.1
%sext.b.1 = sext i16 %ld.b.1 to i32
%mul.1 = mul i32 %sext.a.1, %sext.b.1
%sext.mul.0 = sext i32 %mul.0 to i64
%sext.mul.1 = sext i32 %mul.1 to i64
%add = add i64 %sext.mul.0, %sext.mul.1
%res = add i64 %add, %acc
ret i64 %res
}
; CHECK-LABEL: multi_block
; CHECK: [[CAST_A:%[^ ]+]] = bitcast i16* %a to i32*
; CHECK: [[A:%[^ ]+]] = load i32, i32* [[CAST_A]]
; CHECK: [[CAST_B:%[^ ]+]] = bitcast i16* %b to i32*
; CHECK: [[B:%[^ ]+]] = load i32, i32* [[CAST_B]]
; CHECK: call i32 @llvm.arm.smlad(i32 [[A]], i32 [[B]], i32 0)
define i32 @multi_block(i16* %a, i16* %b, i32 %acc) {
entry:
%ld.a.0 = load i16, i16* %a
%sext.a.0 = sext i16 %ld.a.0 to i32
%ld.b.0 = load i16, i16* %b
%sext.b.0 = sext i16 %ld.b.0 to i32
%mul.0 = mul i32 %sext.a.0, %sext.b.0
%addr.a.1 = getelementptr i16, i16* %a, i32 1
%addr.b.1 = getelementptr i16, i16* %b, i32 1
%ld.a.1 = load i16, i16* %addr.a.1
%sext.a.1 = sext i16 %ld.a.1 to i32
%ld.b.1 = load i16, i16* %addr.b.1
%sext.b.1 = sext i16 %ld.b.1 to i32
%mul.1 = mul i32 %sext.a.1, %sext.b.1
%add = add i32 %mul.0, %mul.1
br label %bb.1
bb.1:
%res = add i32 %add, %acc
ret i32 %res
}
; CHECK-LABEL: multi_block_64
; CHECK: [[CAST_A:%[^ ]+]] = bitcast i16* %a to i32*
; CHECK: [[A:%[^ ]+]] = load i32, i32* [[CAST_A]]
; CHECK: [[CAST_B:%[^ ]+]] = bitcast i16* %b to i32*
; CHECK: [[B:%[^ ]+]] = load i32, i32* [[CAST_B]]
; CHECK: call i64 @llvm.arm.smlald(i32 [[A]], i32 [[B]], i64 0)
define i64 @multi_block_64(i16* %a, i16* %b, i64 %acc) {
entry:
%ld.a.0 = load i16, i16* %a
%sext.a.0 = sext i16 %ld.a.0 to i32
%ld.b.0 = load i16, i16* %b
%sext.b.0 = sext i16 %ld.b.0 to i32
%mul.0 = mul i32 %sext.a.0, %sext.b.0
%addr.a.1 = getelementptr i16, i16* %a, i32 1
%addr.b.1 = getelementptr i16, i16* %b, i32 1
%ld.a.1 = load i16, i16* %addr.a.1
%sext.a.1 = sext i16 %ld.a.1 to i32
%ld.b.1 = load i16, i16* %addr.b.1
%sext.b.1 = sext i16 %ld.b.1 to i32
%mul.1 = mul i32 %sext.a.1, %sext.b.1
%sext.mul.0 = sext i32 %mul.0 to i64
%sext.mul.1 = sext i32 %mul.1 to i64
%add = add i64 %sext.mul.0, %sext.mul.1
br label %bb.1
bb.1:
%res = add i64 %add, %acc
ret i64 %res
}
; CHECK-LABEL: multi_block_1
; CHECK-NOT: call i32 @llvm.arm.smlad
define i32 @multi_block_1(i16* %a, i16* %b, i32 %acc) {
entry:
%ld.a.0 = load i16, i16* %a
%sext.a.0 = sext i16 %ld.a.0 to i32
%ld.b.0 = load i16, i16* %b
%sext.b.0 = sext i16 %ld.b.0 to i32
%mul.0 = mul i32 %sext.a.0, %sext.b.0
br label %bb.1
bb.1:
%addr.a.1 = getelementptr i16, i16* %a, i32 1
%addr.b.1 = getelementptr i16, i16* %b, i32 1
%ld.a.1 = load i16, i16* %addr.a.1
%sext.a.1 = sext i16 %ld.a.1 to i32
%ld.b.1 = load i16, i16* %addr.b.1
%sext.b.1 = sext i16 %ld.b.1 to i32
%mul.1 = mul i32 %sext.a.1, %sext.b.1
%add = add i32 %mul.0, %mul.1
%res = add i32 %add, %acc
ret i32 %res
}
; TODO: Four smlads should be generated here, but mul.0 and mul.3 remain as
; scalars.
; CHECK-LABEL: num_load_limit
; CHECK: call i32 @llvm.arm.smlad
; CHECK: call i32 @llvm.arm.smlad
; CHECK: call i32 @llvm.arm.smlad
; CHECK-NOT: call i32 @llvm.arm.smlad
define i32 @num_load_limit(i16* %a, i16* %b, i32 %acc) {
entry:
%ld.a.0 = load i16, i16* %a
%sext.a.0 = sext i16 %ld.a.0 to i32
%ld.b.0 = load i16, i16* %b
%sext.b.0 = sext i16 %ld.b.0 to i32
%mul.0 = mul i32 %sext.a.0, %sext.b.0
%addr.a.1 = getelementptr i16, i16* %a, i32 1
%addr.b.1 = getelementptr i16, i16* %b, i32 1
%ld.a.1 = load i16, i16* %addr.a.1
%sext.a.1 = sext i16 %ld.a.1 to i32
%ld.b.1 = load i16, i16* %addr.b.1
%sext.b.1 = sext i16 %ld.b.1 to i32
%mul.1 = mul i32 %sext.a.1, %sext.b.1
%add.0 = add i32 %mul.0, %mul.1
%addr.a.2 = getelementptr i16, i16* %a, i32 2
%addr.b.2 = getelementptr i16, i16* %b, i32 2
%ld.a.2 = load i16, i16* %addr.a.2
%sext.a.2 = sext i16 %ld.a.2 to i32
%ld.b.2 = load i16, i16* %addr.b.2
%sext.b.2 = sext i16 %ld.b.2 to i32
%mul.2 = mul i32 %sext.a.0, %sext.b.0
%addr.a.3 = getelementptr i16, i16* %a, i32 3
%addr.b.3 = getelementptr i16, i16* %b, i32 3
%ld.a.3 = load i16, i16* %addr.a.3
%sext.a.3 = sext i16 %ld.a.3 to i32
%ld.b.3 = load i16, i16* %addr.b.3
%sext.b.3 = sext i16 %ld.b.3 to i32
%mul.3 = mul i32 %sext.a.1, %sext.b.3
%add.3 = add i32 %mul.2, %mul.3
%addr.a.4 = getelementptr i16, i16* %a, i32 4
%addr.b.4 = getelementptr i16, i16* %b, i32 4
%ld.a.4 = load i16, i16* %addr.a.4
%sext.a.4 = sext i16 %ld.a.4 to i32
%ld.b.4 = load i16, i16* %addr.b.4
%sext.b.4 = sext i16 %ld.b.4 to i32
%mul.4 = mul i32 %sext.a.4, %sext.b.4
%addr.a.5 = getelementptr i16, i16* %a, i32 5
%addr.b.5 = getelementptr i16, i16* %b, i32 5
%ld.a.5 = load i16, i16* %addr.a.5
%sext.a.5 = sext i16 %ld.a.5 to i32
%ld.b.5 = load i16, i16* %addr.b.5
%sext.b.5 = sext i16 %ld.b.5 to i32
%mul.5 = mul i32 %sext.a.5, %sext.b.5
%add.5 = add i32 %mul.4, %mul.5
%addr.a.6 = getelementptr i16, i16* %a, i32 6
%addr.b.6 = getelementptr i16, i16* %b, i32 6
%ld.a.6 = load i16, i16* %addr.a.6
%sext.a.6 = sext i16 %ld.a.6 to i32
%ld.b.6 = load i16, i16* %addr.b.6
%sext.b.6 = sext i16 %ld.b.6 to i32
%mul.6 = mul i32 %sext.a.6, %sext.b.6
%addr.a.7 = getelementptr i16, i16* %a, i32 7
%addr.b.7 = getelementptr i16, i16* %b, i32 7
%ld.a.7 = load i16, i16* %addr.a.7
%sext.a.7 = sext i16 %ld.a.7 to i32
%ld.b.7 = load i16, i16* %addr.b.7
%sext.b.7 = sext i16 %ld.b.7 to i32
%mul.7 = mul i32 %sext.a.7, %sext.b.7
%add.7 = add i32 %mul.6, %mul.7
%add.10 = add i32 %add.7, %add.5
%add.11 = add i32 %add.3, %add.0
%add.12 = add i32 %add.10, %add.11
%res = add i32 %add.12, %acc
ret i32 %res
}
; CHECK-LABEL: too_many_loads
; CHECK-NOT: call i32 @llvm.arm.smlad
define i32 @too_many_loads(i16* %a, i16* %b, i32 %acc) {
entry:
%ld.a.0 = load i16, i16* %a
%sext.a.0 = sext i16 %ld.a.0 to i32
%ld.b.0 = load i16, i16* %b
%sext.b.0 = sext i16 %ld.b.0 to i32
%mul.0 = mul i32 %sext.a.0, %sext.b.0
%addr.a.1 = getelementptr i16, i16* %a, i32 1
%addr.b.1 = getelementptr i16, i16* %b, i32 1
%ld.a.1 = load i16, i16* %addr.a.1
%sext.a.1 = sext i16 %ld.a.1 to i32
%ld.b.1 = load i16, i16* %addr.b.1
%sext.b.1 = sext i16 %ld.b.1 to i32
%mul.1 = mul i32 %sext.a.1, %sext.b.1
%add.0 = add i32 %mul.0, %mul.1
%addr.a.2 = getelementptr i16, i16* %a, i32 2
%addr.b.2 = getelementptr i16, i16* %b, i32 2
%ld.a.2 = load i16, i16* %addr.a.2
%sext.a.2 = sext i16 %ld.a.2 to i32
%ld.b.2 = load i16, i16* %addr.b.2
%sext.b.2 = sext i16 %ld.b.2 to i32
%mul.2 = mul i32 %sext.a.0, %sext.b.0
%addr.a.3 = getelementptr i16, i16* %a, i32 3
%addr.b.3 = getelementptr i16, i16* %b, i32 3
%ld.a.3 = load i16, i16* %addr.a.3
%sext.a.3 = sext i16 %ld.a.3 to i32
%ld.b.3 = load i16, i16* %addr.b.3
%sext.b.3 = sext i16 %ld.b.3 to i32
%mul.3 = mul i32 %sext.a.1, %sext.b.3
%add.3 = add i32 %mul.2, %mul.3
%addr.a.4 = getelementptr i16, i16* %a, i32 4
%addr.b.4 = getelementptr i16, i16* %b, i32 4
%ld.a.4 = load i16, i16* %addr.a.4
%sext.a.4 = sext i16 %ld.a.4 to i32
%ld.b.4 = load i16, i16* %addr.b.4
%sext.b.4 = sext i16 %ld.b.4 to i32
%mul.4 = mul i32 %sext.a.4, %sext.b.4
%addr.a.5 = getelementptr i16, i16* %a, i32 5
%addr.b.5 = getelementptr i16, i16* %b, i32 5
%ld.a.5 = load i16, i16* %addr.a.5
%sext.a.5 = sext i16 %ld.a.5 to i32
%ld.b.5 = load i16, i16* %addr.b.5
%sext.b.5 = sext i16 %ld.b.5 to i32
%mul.5 = mul i32 %sext.a.5, %sext.b.5
%add.5 = add i32 %mul.4, %mul.5
%addr.a.6 = getelementptr i16, i16* %a, i32 6
%addr.b.6 = getelementptr i16, i16* %b, i32 6
%ld.a.6 = load i16, i16* %addr.a.6
%sext.a.6 = sext i16 %ld.a.6 to i32
%ld.b.6 = load i16, i16* %addr.b.6
%sext.b.6 = sext i16 %ld.b.6 to i32
%mul.6 = mul i32 %sext.a.6, %sext.b.6
%addr.a.7 = getelementptr i16, i16* %a, i32 7
%addr.b.7 = getelementptr i16, i16* %b, i32 7
%ld.a.7 = load i16, i16* %addr.a.7
%sext.a.7 = sext i16 %ld.a.7 to i32
%ld.b.7 = load i16, i16* %addr.b.7
%sext.b.7 = sext i16 %ld.b.7 to i32
%mul.7 = mul i32 %sext.a.7, %sext.b.7
%add.7 = add i32 %mul.6, %mul.7
%addr.a.8 = getelementptr i16, i16* %a, i32 7
%addr.b.8 = getelementptr i16, i16* %b, i32 7
%ld.a.8 = load i16, i16* %addr.a.8
%sext.a.8 = sext i16 %ld.a.8 to i32
%ld.b.8 = load i16, i16* %addr.b.8
%sext.b.8 = sext i16 %ld.b.8 to i32
%mul.8 = mul i32 %sext.a.8, %sext.b.8
%add.10 = add i32 %add.7, %add.5
%add.11 = add i32 %add.3, %add.0
%add.12 = add i32 %add.10, %add.11
%add.13 = add i32 %add.12, %acc
%res = add i32 %add.13, %mul.8
ret i32 %res
}