175 lines
7.5 KiB
LLVM
175 lines
7.5 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -loop-unroll -mtriple=thumbv7a-unknown-linux-gnueabihf -S %s | FileCheck %s
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; Check we unroll even with optsize, if the result is smaller, either because
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; we have single iteration loops or bodies with constant folding opportunities
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; after fully unrolling.
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; TODO: Looks like we should enable some unrolling for M-class, even when
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; optimising for size.
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declare i32 @get()
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define void @fully_unrolled_single_iteration(i32* %src) #0 {
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; CHECK-LABEL: @fully_unrolled_single_iteration(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ARR:%.*]] = alloca [4 x i32], align 4
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[SRC:%.*]]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 0
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; CHECK-NEXT: store i32 [[V]], i32* [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[PTR:%.*]] = bitcast [4 x i32]* [[ARR]] to i32*
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; CHECK-NEXT: call void @use(i32* nonnull [[PTR]])
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; CHECK-NEXT: ret void
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;
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entry:
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%arr = alloca [4 x i32], align 4
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%src.idx = getelementptr inbounds i32, i32* %src, i64 %indvars.iv
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%v = load i32, i32* %src.idx
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%arrayidx = getelementptr inbounds [4 x i32], [4 x i32]* %arr, i64 0, i64 %indvars.iv
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store i32 %v, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 1
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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for.cond.cleanup: ; preds = %for.cond
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%ptr = bitcast [4 x i32]* %arr to i32*
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call void @use(i32* nonnull %ptr) #4
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ret void
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}
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define void @fully_unrolled_smaller() #0 {
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; CHECK-LABEL: @fully_unrolled_smaller(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ARR:%.*]] = alloca [4 x i32], align 4
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 0
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; CHECK-NEXT: store i32 16, i32* [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 1
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; CHECK-NEXT: store i32 4104, i32* [[ARRAYIDX_1]], align 4
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; CHECK-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 2
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; CHECK-NEXT: store i32 1048592, i32* [[ARRAYIDX_2]], align 4
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; CHECK-NEXT: [[ARRAYIDX_3:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 3
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; CHECK-NEXT: store i32 268435480, i32* [[ARRAYIDX_3]], align 4
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; CHECK-NEXT: [[PTR:%.*]] = bitcast [4 x i32]* [[ARR]] to i32*
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; CHECK-NEXT: call void @use(i32* nonnull [[PTR]])
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; CHECK-NEXT: ret void
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;
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entry:
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%arr = alloca [4 x i32], align 4
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%indvars.iv.tr = trunc i64 %indvars.iv to i32
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%shl.0 = shl i32 %indvars.iv.tr, 3
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%shl.1 = shl i32 16, %shl.0
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%or = or i32 %shl.1, %shl.0
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%arrayidx = getelementptr inbounds [4 x i32], [4 x i32]* %arr, i64 0, i64 %indvars.iv
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store i32 %or, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv, 3
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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for.cond.cleanup: ; preds = %for.cond
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%ptr = bitcast [4 x i32]* %arr to i32*
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call void @use(i32* nonnull %ptr) #4
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ret void
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}
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define void @fully_unrolled_smaller_Oz() #1 {
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; CHECK-LABEL: @fully_unrolled_smaller_Oz(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ARR:%.*]] = alloca [4 x i32], align 4
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 0
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; CHECK-NEXT: store i32 16, i32* [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 1
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; CHECK-NEXT: store i32 4104, i32* [[ARRAYIDX_1]], align 4
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; CHECK-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 2
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; CHECK-NEXT: store i32 1048592, i32* [[ARRAYIDX_2]], align 4
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; CHECK-NEXT: [[ARRAYIDX_3:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 3
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; CHECK-NEXT: store i32 268435480, i32* [[ARRAYIDX_3]], align 4
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; CHECK-NEXT: [[PTR:%.*]] = bitcast [4 x i32]* [[ARR]] to i32*
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; CHECK-NEXT: call void @use(i32* nonnull [[PTR]])
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; CHECK-NEXT: ret void
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;
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entry:
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%arr = alloca [4 x i32], align 4
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%indvars.iv.tr = trunc i64 %indvars.iv to i32
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%shl.0 = shl i32 %indvars.iv.tr, 3
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%shl.1 = shl i32 16, %shl.0
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%or = or i32 %shl.1, %shl.0
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%arrayidx = getelementptr inbounds [4 x i32], [4 x i32]* %arr, i64 0, i64 %indvars.iv
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store i32 %or, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv, 3
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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for.cond.cleanup: ; preds = %for.cond
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%ptr = bitcast [4 x i32]* %arr to i32*
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call void @use(i32* nonnull %ptr) #4
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ret void
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}
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define void @fully_unrolled_bigger() #0 {
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; CHECK-LABEL: @fully_unrolled_bigger(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ARR:%.*]] = alloca [4 x i32], align 4
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[INDVARS_IV_TR:%.*]] = trunc i64 [[INDVARS_IV]] to i32
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; CHECK-NEXT: [[SHL_0:%.*]] = shl i32 [[INDVARS_IV_TR]], 3
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; CHECK-NEXT: [[SHL_1:%.*]] = shl i32 16, [[SHL_0]]
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; CHECK-NEXT: [[OR:%.*]] = or i32 [[SHL_1]], [[SHL_0]]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* [[ARR]], i64 0, i64 [[INDVARS_IV]]
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; CHECK-NEXT: store i32 [[OR]], i32* [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV]], 7
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_BODY]]
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; CHECK: for.cond.cleanup:
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; CHECK-NEXT: [[PTR:%.*]] = bitcast [4 x i32]* [[ARR]] to i32*
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; CHECK-NEXT: call void @use(i32* nonnull [[PTR]])
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; CHECK-NEXT: ret void
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;
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entry:
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%arr = alloca [4 x i32], align 4
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%indvars.iv.tr = trunc i64 %indvars.iv to i32
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%shl.0 = shl i32 %indvars.iv.tr, 3
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%shl.1 = shl i32 16, %shl.0
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%or = or i32 %shl.1, %shl.0
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%arrayidx = getelementptr inbounds [4 x i32], [4 x i32]* %arr, i64 0, i64 %indvars.iv
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store i32 %or, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv, 7
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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for.cond.cleanup: ; preds = %for.cond
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%ptr = bitcast [4 x i32]* %arr to i32*
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call void @use(i32* nonnull %ptr) #4
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ret void
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}
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declare void @use(i32*)
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attributes #0 = { optsize }
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attributes #1 = { minsize optsize }
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