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llvm-mirror/test/CodeGen/ARM/ParallelDSP/inner-full-unroll.ll
Sam Parker e757c4f305 [ARM][ParallelDSP] Change smlad insertion order 
Instead of inserting everything after the 'root' of the reduction,
insert all instructions as close to their operands as possible. This
can help reduce register pressure.

Differential Revision: https://reviews.llvm.org/D67392

llvm-svn: 374981
2019-10-16 09:37:03 +00:00

152 lines
7.3 KiB
LLVM
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; RUN: opt -mtriple=thumbv7em -arm-parallel-dsp -dce -S %s -o - | FileCheck %s
; CHECK-LABEL: full_unroll
; CHECK: [[IV:%[^ ]+]] = phi i32
; CHECK: [[AI:%[^ ]+]] = getelementptr inbounds i32, i32* %a, i32 [[IV]]
; CHECK: [[BI:%[^ ]+]] = getelementptr inbounds i16*, i16** %b, i32 [[IV]]
; CHECK: [[BIJ:%[^ ]+]] = load i16*, i16** %arrayidx5, align 4
; CHECK: [[CI:%[^ ]+]] = getelementptr inbounds i16*, i16** %c, i32 [[IV]]
; CHECK: [[CIJ:%[^ ]+]] = load i16*, i16** [[CI]], align 4
; CHECK: [[BIJ_CAST:%[^ ]+]] = bitcast i16* [[BIJ]] to i32*
; CHECK: [[BIJ_LD:%[^ ]+]] = load i32, i32* [[BIJ_CAST]], align 2
; CHECK: [[CIJ_CAST:%[^ ]+]] = bitcast i16* [[CIJ]] to i32*
; CHECK: [[CIJ_LD:%[^ ]+]] = load i32, i32* [[CIJ_CAST]], align 2
; CHECK: [[SMLAD0:%[^ ]+]] = call i32 @llvm.arm.smlad(i32 [[CIJ_LD]], i32 [[BIJ_LD]], i32 0)
; CHECK: [[BIJ_2:%[^ ]+]] = getelementptr inbounds i16, i16* [[BIJ]], i32 2
; CHECK: [[BIJ_2_CAST:%[^ ]+]] = bitcast i16* [[BIJ_2]] to i32*
; CHECK: [[BIJ_2_LD:%[^ ]+]] = load i32, i32* [[BIJ_2_CAST]], align 2
; CHECK: [[CIJ_2:%[^ ]+]] = getelementptr inbounds i16, i16* [[CIJ]], i32 2
; CHECK: [[CIJ_2_CAST:%[^ ]+]] = bitcast i16* [[CIJ_2]] to i32*
; CHECK: [[CIJ_2_LD:%[^ ]+]] = load i32, i32* [[CIJ_2_CAST]], align 2
; CHECK: [[SMLAD1:%[^ ]+]] = call i32 @llvm.arm.smlad(i32 [[CIJ_2_LD]], i32 [[BIJ_2_LD]], i32 [[SMLAD0]])
; CHECK: store i32 [[SMLAD1]], i32* %arrayidx, align 4
define void @full_unroll(i32* noalias nocapture %a, i16** noalias nocapture readonly %b, i16** noalias nocapture readonly %c, i32 %N) {
entry:
%cmp29 = icmp eq i32 %N, 0
br i1 %cmp29, label %for.cond.cleanup, label %for.body
for.cond.cleanup: ; preds = %for.body, %entry
ret void
for.body: ; preds = %entry, %for.body
%i.030 = phi i32 [ %inc12, %for.body ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %a, i32 %i.030
%arrayidx5 = getelementptr inbounds i16*, i16** %b, i32 %i.030
%0 = load i16*, i16** %arrayidx5, align 4
%arrayidx7 = getelementptr inbounds i16*, i16** %c, i32 %i.030
%1 = load i16*, i16** %arrayidx7, align 4
%2 = load i16, i16* %0, align 2
%conv = sext i16 %2 to i32
%3 = load i16, i16* %1, align 2
%conv9 = sext i16 %3 to i32
%mul = mul nsw i32 %conv9, %conv
%arrayidx6.1 = getelementptr inbounds i16, i16* %0, i32 1
%4 = load i16, i16* %arrayidx6.1, align 2
%conv.1 = sext i16 %4 to i32
%arrayidx8.1 = getelementptr inbounds i16, i16* %1, i32 1
%5 = load i16, i16* %arrayidx8.1, align 2
%conv9.1 = sext i16 %5 to i32
%mul.1 = mul nsw i32 %conv9.1, %conv.1
%add.1 = add nsw i32 %mul.1, %mul
%arrayidx6.2 = getelementptr inbounds i16, i16* %0, i32 2
%6 = load i16, i16* %arrayidx6.2, align 2
%conv.2 = sext i16 %6 to i32
%arrayidx8.2 = getelementptr inbounds i16, i16* %1, i32 2
%7 = load i16, i16* %arrayidx8.2, align 2
%conv9.2 = sext i16 %7 to i32
%mul.2 = mul nsw i32 %conv9.2, %conv.2
%add.2 = add nsw i32 %mul.2, %add.1
%arrayidx6.3 = getelementptr inbounds i16, i16* %0, i32 3
%8 = load i16, i16* %arrayidx6.3, align 2
%conv.3 = sext i16 %8 to i32
%arrayidx8.3 = getelementptr inbounds i16, i16* %1, i32 3
%9 = load i16, i16* %arrayidx8.3, align 2
%conv9.3 = sext i16 %9 to i32
%mul.3 = mul nsw i32 %conv9.3, %conv.3
%add.3 = add nsw i32 %mul.3, %add.2
store i32 %add.3, i32* %arrayidx, align 4
%inc12 = add nuw i32 %i.030, 1
%exitcond = icmp eq i32 %inc12, %N
br i1 %exitcond, label %for.cond.cleanup, label %for.body
}
; CHECK-LABEL: full_unroll_sub
; CHEC: [[IV:%[^ ]+]] = phi i32
; CHECK: [[AI:%[^ ]+]] = getelementptr inbounds i32, i32* %a, i32 [[IV]]
; CHECK: [[BI:%[^ ]+]] = getelementptr inbounds i16*, i16** %b, i32 [[IV]]
; CHECK: [[BIJ:%[^ ]+]] = load i16*, i16** [[BI]], align 4
; CHECK: [[CI:%[^ ]+]] = getelementptr inbounds i16*, i16** %c, i32 [[IV]]
; CHECK: [[CIJ:%[^ ]+]] = load i16*, i16** [[CI]], align 4
; CHECK: [[BIJ_LD:%[^ ]+]] = load i16, i16* [[BIJ]], align 2
; CHECK: [[BIJ_LD_SXT:%[^ ]+]] = sext i16 [[BIJ_LD]] to i32
; CHECK: [[CIJ_LD:%[^ ]+]] = load i16, i16* [[CIJ]], align 2
; CHECK: [[CIJ_LD_SXT:%[^ ]+]] = sext i16 [[CIJ_LD]] to i32
; CHECK: [[SUB:%[^ ]+]] = sub nsw i32 [[CIJ_LD_SXT]], [[BIJ_LD_SXT]]
; CHECK: [[BIJ_1:%[^ ]+]] = getelementptr inbounds i16, i16* [[BIJ]], i32 1
; CHECK: [[BIJ_1_LD:%[^ ]+]] = load i16, i16* [[BIJ_1]], align 2
; CHECK: [[BIJ_1_LD_SXT:%[^ ]+]] = sext i16 [[BIJ_1_LD]] to i32
; CHECK: [[CIJ_1:%[^ ]+]] = getelementptr inbounds i16, i16* [[CIJ]], i32 1
; CHECK: [[CIJ_1_LD:%[^ ]+]] = load i16, i16* [[CIJ_1]], align 2
; CHECK: [[CIJ_1_LD_SXT:%[^ ]+]] = sext i16 [[CIJ_1_LD]] to i32
; CHECK: [[MUL:%[^ ]+]] = mul nsw i32 [[CIJ_1_LD_SXT]], [[BIJ_1_LD_SXT]]
; CHECK: [[ACC:%[^ ]+]] = add nsw i32 [[MUL]], [[SUB]]
; CHECK: [[BIJ_2:%[^ ]+]] = getelementptr inbounds i16, i16* [[BIJ]], i32 2
; CHECK: [[BIJ_2_CAST:%[^ ]+]] = bitcast i16* [[BIJ_2]] to i32*
; CHECK: [[BIJ_2_LD:%[^ ]+]] = load i32, i32* [[BIJ_2_CAST]], align 2
; CHECK: [[CIJ_2:%[^ ]+]] = getelementptr inbounds i16, i16* [[CIJ]], i32 2
; CHECK: [[CIJ_2_CAST:%[^ ]+]] = bitcast i16* [[CIJ_2]] to i32*
; CHECK: [[CIJ_2_LD:%[^ ]+]] = load i32, i32* [[CIJ_2_CAST]], align 2
; CHECK: [[SMLAD0:%[^ ]+]] = call i32 @llvm.arm.smlad(i32 [[CIJ_2_LD]], i32 [[BIJ_2_LD]], i32 [[ACC]])
; CHECK: store i32 [[SMLAD0]], i32* %arrayidx, align 4
define void @full_unroll_sub(i32* noalias nocapture %a, i16** noalias nocapture readonly %b, i16** noalias nocapture readonly %c, i32 %N) {
entry:
%cmp29 = icmp eq i32 %N, 0
br i1 %cmp29, label %for.cond.cleanup, label %for.body
for.cond.cleanup: ; preds = %for.body, %entry
ret void
for.body: ; preds = %entry, %for.body
%i.030 = phi i32 [ %inc12, %for.body ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %a, i32 %i.030
%arrayidx5 = getelementptr inbounds i16*, i16** %b, i32 %i.030
%0 = load i16*, i16** %arrayidx5, align 4
%arrayidx7 = getelementptr inbounds i16*, i16** %c, i32 %i.030
%1 = load i16*, i16** %arrayidx7, align 4
%2 = load i16, i16* %0, align 2
%conv = sext i16 %2 to i32
%3 = load i16, i16* %1, align 2
%conv9 = sext i16 %3 to i32
%sub = sub nsw i32 %conv9, %conv
%arrayidx6.1 = getelementptr inbounds i16, i16* %0, i32 1
%4 = load i16, i16* %arrayidx6.1, align 2
%conv.1 = sext i16 %4 to i32
%arrayidx8.1 = getelementptr inbounds i16, i16* %1, i32 1
%5 = load i16, i16* %arrayidx8.1, align 2
%conv9.1 = sext i16 %5 to i32
%mul.1 = mul nsw i32 %conv9.1, %conv.1
%add.1 = add nsw i32 %mul.1, %sub
%arrayidx6.2 = getelementptr inbounds i16, i16* %0, i32 2
%6 = load i16, i16* %arrayidx6.2, align 2
%conv.2 = sext i16 %6 to i32
%arrayidx8.2 = getelementptr inbounds i16, i16* %1, i32 2
%7 = load i16, i16* %arrayidx8.2, align 2
%conv9.2 = sext i16 %7 to i32
%mul.2 = mul nsw i32 %conv9.2, %conv.2
%add.2 = add nsw i32 %mul.2, %add.1
%arrayidx6.3 = getelementptr inbounds i16, i16* %0, i32 3
%8 = load i16, i16* %arrayidx6.3, align 2
%conv.3 = sext i16 %8 to i32
%arrayidx8.3 = getelementptr inbounds i16, i16* %1, i32 3
%9 = load i16, i16* %arrayidx8.3, align 2
%conv9.3 = sext i16 %9 to i32
%mul.3 = mul nsw i32 %conv9.3, %conv.3
%add.3 = add nsw i32 %mul.3, %add.2
store i32 %add.3, i32* %arrayidx, align 4
%inc12 = add nuw i32 %i.030, 1
%exitcond = icmp eq i32 %inc12, %N
br i1 %exitcond, label %for.cond.cleanup, label %for.body
}
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