240 lines
13 KiB
LLVM
240 lines
13 KiB
LLVM
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; RUN: llc < %s -block-placement-exit-block-bias=20 -no-phi-elim-live-out-early-exit | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.9.0"
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; This is longest_match, the hot function from zlib's deflate implementation.
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%struct.internal_state = type { %struct.z_stream_s*, i32, i8*, i64, i8*, i32, i32, %struct.gz_header_s*, i32, i8, i32, i32, i32, i32, i8*, i64, i16*, i16*, i32, i32, i32, i32, i32, i64, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [573 x %struct.ct_data_s], [61 x %struct.ct_data_s], [39 x %struct.ct_data_s], %struct.tree_desc_s, %struct.tree_desc_s, %struct.tree_desc_s, [16 x i16], [573 x i32], i32, i32, [573 x i8], i8*, i32, i32, i16*, i64, i64, i32, i32, i16, i32, i64 }
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%struct.z_stream_s = type { i8*, i32, i64, i8*, i32, i64, i8*, %struct.internal_state*, i8* (i8*, i32, i32)*, void (i8*, i8*)*, i8*, i32, i64, i64 }
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%struct.gz_header_s = type { i32, i64, i32, i32, i8*, i32, i32, i8*, i32, i8*, i32, i32, i32 }
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%struct.ct_data_s = type { %union.anon, %union.anon.0 }
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%union.anon = type { i16 }
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%union.anon.0 = type { i16 }
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%struct.tree_desc_s = type { %struct.ct_data_s*, i32, %struct.static_tree_desc_s* }
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%struct.static_tree_desc_s = type { i32 }
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; CHECK-LABEL: longest_match:
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; Verify that there are no spills or reloads in the loop exit block. This loop
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; is mostly cold, only %do.cond125 and %land.rhs131 are hot.
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; CHECK: %do.cond125
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; CHECK-NOT: {{Spill|Reload}}
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; CHECK: jbe
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; Verify that block placement doesn't destroy source order. It's important that
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; the two hot blocks are laid out close to each other.
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; CHECK-NEXT: %land.rhs131
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; CHECK: jne
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define i32 @longest_match(%struct.internal_state* nocapture %s, i32 %cur_match) nounwind {
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entry:
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%max_chain_length = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 31
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%0 = load i32, i32* %max_chain_length, align 4
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%window = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 14
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%1 = load i8*, i8** %window, align 8
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%strstart = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 27
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%2 = load i32, i32* %strstart, align 4
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%idx.ext = zext i32 %2 to i64
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%add.ptr = getelementptr inbounds i8, i8* %1, i64 %idx.ext
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%prev_length = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 30
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%3 = load i32, i32* %prev_length, align 4
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%nice_match1 = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 36
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%4 = load i32, i32* %nice_match1, align 4
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%w_size = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 11
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%5 = load i32, i32* %w_size, align 4
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%sub = add i32 %5, -262
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%cmp = icmp ugt i32 %2, %sub
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%sub6 = sub i32 %2, %sub
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%sub6. = select i1 %cmp, i32 %sub6, i32 0
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%prev7 = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 16
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%6 = load i16*, i16** %prev7, align 8
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%w_mask = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 13
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%7 = load i32, i32* %w_mask, align 4
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%add.ptr11.sum = add i64 %idx.ext, 258
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%add.ptr12 = getelementptr inbounds i8, i8* %1, i64 %add.ptr11.sum
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%sub13 = add nsw i32 %3, -1
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%idxprom = sext i32 %sub13 to i64
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%add.ptr.sum = add i64 %idxprom, %idx.ext
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%arrayidx = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum
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%8 = load i8, i8* %arrayidx, align 1
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%idxprom14 = sext i32 %3 to i64
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%add.ptr.sum213 = add i64 %idxprom14, %idx.ext
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%arrayidx15 = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum213
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%9 = load i8, i8* %arrayidx15, align 1
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%good_match = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 35
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%10 = load i32, i32* %good_match, align 4
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%cmp17 = icmp ult i32 %3, %10
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%shr = lshr i32 %0, 2
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%chain_length.0 = select i1 %cmp17, i32 %0, i32 %shr
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%lookahead = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 29
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%11 = load i32, i32* %lookahead, align 4
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%cmp18 = icmp ugt i32 %4, %11
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%. = select i1 %cmp18, i32 %11, i32 %4
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%match_start = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 28
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%add.ptr.sum217 = add i64 %idx.ext, 1
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%arrayidx44 = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum217
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%add.ptr.sum218 = add i64 %idx.ext, 2
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%add.ptr50 = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum218
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%sub.ptr.lhs.cast = ptrtoint i8* %add.ptr12 to i64
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br label %do.body
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do.body: ; preds = %land.rhs131, %entry
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%best_len.0 = phi i32 [ %best_len.1, %land.rhs131 ], [ %3, %entry ]
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%chain_length.1 = phi i32 [ %dec, %land.rhs131 ], [ %chain_length.0, %entry ]
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%cur_match.addr.0 = phi i32 [ %conv128, %land.rhs131 ], [ %cur_match, %entry ]
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%scan_end1.0 = phi i8 [ %scan_end1.1, %land.rhs131 ], [ %8, %entry ]
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%scan_end.0 = phi i8 [ %scan_end.1, %land.rhs131 ], [ %9, %entry ]
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%idx.ext23 = zext i32 %cur_match.addr.0 to i64
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%add.ptr24 = getelementptr inbounds i8, i8* %1, i64 %idx.ext23
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%idxprom25 = sext i32 %best_len.0 to i64
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%add.ptr24.sum = add i64 %idx.ext23, %idxprom25
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%arrayidx26 = getelementptr inbounds i8, i8* %1, i64 %add.ptr24.sum
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%12 = load i8, i8* %arrayidx26, align 1
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%cmp28 = icmp eq i8 %12, %scan_end.0
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br i1 %cmp28, label %lor.lhs.false, label %do.cond125
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lor.lhs.false: ; preds = %do.body
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%sub30 = add nsw i32 %best_len.0, -1
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%idxprom31 = sext i32 %sub30 to i64
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%add.ptr24.sum214 = add i64 %idx.ext23, %idxprom31
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%arrayidx32 = getelementptr inbounds i8, i8* %1, i64 %add.ptr24.sum214
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%13 = load i8, i8* %arrayidx32, align 1
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%cmp35 = icmp eq i8 %13, %scan_end1.0
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br i1 %cmp35, label %lor.lhs.false37, label %do.cond125
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lor.lhs.false37: ; preds = %lor.lhs.false
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%14 = load i8, i8* %add.ptr24, align 1
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%15 = load i8, i8* %add.ptr, align 1
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%cmp40 = icmp eq i8 %14, %15
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br i1 %cmp40, label %lor.lhs.false42, label %do.cond125
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lor.lhs.false42: ; preds = %lor.lhs.false37
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%add.ptr24.sum215 = add i64 %idx.ext23, 1
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%incdec.ptr = getelementptr inbounds i8, i8* %1, i64 %add.ptr24.sum215
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%16 = load i8, i8* %incdec.ptr, align 1
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%17 = load i8, i8* %arrayidx44, align 1
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%cmp46 = icmp eq i8 %16, %17
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br i1 %cmp46, label %if.end49, label %do.cond125
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if.end49: ; preds = %lor.lhs.false42
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%incdec.ptr.sum = add i64 %idx.ext23, 2
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%incdec.ptr51 = getelementptr inbounds i8, i8* %1, i64 %incdec.ptr.sum
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br label %do.cond
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do.cond: ; preds = %land.lhs.true100, %if.end49
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%match.0 = phi i8* [ %incdec.ptr51, %if.end49 ], [ %incdec.ptr103, %land.lhs.true100 ]
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%scan.1 = phi i8* [ %add.ptr50, %if.end49 ], [ %incdec.ptr101, %land.lhs.true100 ]
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%incdec.ptr53 = getelementptr inbounds i8, i8* %scan.1, i64 1
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%18 = load i8, i8* %incdec.ptr53, align 1
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%incdec.ptr55 = getelementptr inbounds i8, i8* %match.0, i64 1
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%19 = load i8, i8* %incdec.ptr55, align 1
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%cmp57 = icmp eq i8 %18, %19
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br i1 %cmp57, label %land.lhs.true, label %do.end
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land.lhs.true: ; preds = %do.cond
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%incdec.ptr59 = getelementptr inbounds i8, i8* %scan.1, i64 2
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%20 = load i8, i8* %incdec.ptr59, align 1
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%incdec.ptr61 = getelementptr inbounds i8, i8* %match.0, i64 2
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%21 = load i8, i8* %incdec.ptr61, align 1
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%cmp63 = icmp eq i8 %20, %21
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br i1 %cmp63, label %land.lhs.true65, label %do.end
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land.lhs.true65: ; preds = %land.lhs.true
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%incdec.ptr66 = getelementptr inbounds i8, i8* %scan.1, i64 3
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%22 = load i8, i8* %incdec.ptr66, align 1
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%incdec.ptr68 = getelementptr inbounds i8, i8* %match.0, i64 3
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%23 = load i8, i8* %incdec.ptr68, align 1
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%cmp70 = icmp eq i8 %22, %23
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br i1 %cmp70, label %land.lhs.true72, label %do.end
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land.lhs.true72: ; preds = %land.lhs.true65
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%incdec.ptr73 = getelementptr inbounds i8, i8* %scan.1, i64 4
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%24 = load i8, i8* %incdec.ptr73, align 1
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%incdec.ptr75 = getelementptr inbounds i8, i8* %match.0, i64 4
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%25 = load i8, i8* %incdec.ptr75, align 1
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%cmp77 = icmp eq i8 %24, %25
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br i1 %cmp77, label %land.lhs.true79, label %do.end
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land.lhs.true79: ; preds = %land.lhs.true72
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%incdec.ptr80 = getelementptr inbounds i8, i8* %scan.1, i64 5
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%26 = load i8, i8* %incdec.ptr80, align 1
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%incdec.ptr82 = getelementptr inbounds i8, i8* %match.0, i64 5
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%27 = load i8, i8* %incdec.ptr82, align 1
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%cmp84 = icmp eq i8 %26, %27
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br i1 %cmp84, label %land.lhs.true86, label %do.end
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land.lhs.true86: ; preds = %land.lhs.true79
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%incdec.ptr87 = getelementptr inbounds i8, i8* %scan.1, i64 6
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%28 = load i8, i8* %incdec.ptr87, align 1
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%incdec.ptr89 = getelementptr inbounds i8, i8* %match.0, i64 6
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%29 = load i8, i8* %incdec.ptr89, align 1
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%cmp91 = icmp eq i8 %28, %29
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br i1 %cmp91, label %land.lhs.true93, label %do.end
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land.lhs.true93: ; preds = %land.lhs.true86
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%incdec.ptr94 = getelementptr inbounds i8, i8* %scan.1, i64 7
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%30 = load i8, i8* %incdec.ptr94, align 1
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%incdec.ptr96 = getelementptr inbounds i8, i8* %match.0, i64 7
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%31 = load i8, i8* %incdec.ptr96, align 1
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%cmp98 = icmp eq i8 %30, %31
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br i1 %cmp98, label %land.lhs.true100, label %do.end
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land.lhs.true100: ; preds = %land.lhs.true93
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%incdec.ptr101 = getelementptr inbounds i8, i8* %scan.1, i64 8
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%32 = load i8, i8* %incdec.ptr101, align 1
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%incdec.ptr103 = getelementptr inbounds i8, i8* %match.0, i64 8
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%33 = load i8, i8* %incdec.ptr103, align 1
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%cmp105 = icmp eq i8 %32, %33
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%cmp107 = icmp ult i8* %incdec.ptr101, %add.ptr12
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%or.cond = and i1 %cmp105, %cmp107
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br i1 %or.cond, label %do.cond, label %do.end
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do.end: ; preds = %land.lhs.true100, %land.lhs.true93, %land.lhs.true86, %land.lhs.true79, %land.lhs.true72, %land.lhs.true65, %land.lhs.true, %do.cond
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%scan.2 = phi i8* [ %incdec.ptr101, %land.lhs.true100 ], [ %incdec.ptr94, %land.lhs.true93 ], [ %incdec.ptr87, %land.lhs.true86 ], [ %incdec.ptr80, %land.lhs.true79 ], [ %incdec.ptr73, %land.lhs.true72 ], [ %incdec.ptr66, %land.lhs.true65 ], [ %incdec.ptr59, %land.lhs.true ], [ %incdec.ptr53, %do.cond ]
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%sub.ptr.rhs.cast = ptrtoint i8* %scan.2 to i64
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%sub.ptr.sub = sub i64 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
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%conv109 = trunc i64 %sub.ptr.sub to i32
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%sub110 = sub nsw i32 258, %conv109
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%cmp112 = icmp sgt i32 %sub110, %best_len.0
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br i1 %cmp112, label %if.then114, label %do.cond125
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if.then114: ; preds = %do.end
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store i32 %cur_match.addr.0, i32* %match_start, align 4
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%cmp115 = icmp slt i32 %sub110, %.
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br i1 %cmp115, label %if.end118, label %do.end135
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if.end118: ; preds = %if.then114
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%sub119 = add nsw i32 %sub110, -1
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%idxprom120 = sext i32 %sub119 to i64
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%add.ptr111.sum = add i64 %idxprom120, %idx.ext
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%arrayidx121 = getelementptr inbounds i8, i8* %1, i64 %add.ptr111.sum
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%34 = load i8, i8* %arrayidx121, align 1
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%idxprom122 = sext i32 %sub110 to i64
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%add.ptr111.sum216 = add i64 %idxprom122, %idx.ext
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%arrayidx123 = getelementptr inbounds i8, i8* %1, i64 %add.ptr111.sum216
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%35 = load i8, i8* %arrayidx123, align 1
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br label %do.cond125
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do.cond125: ; preds = %if.end118, %do.end, %lor.lhs.false42, %lor.lhs.false37, %lor.lhs.false, %do.body
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%best_len.1 = phi i32 [ %best_len.0, %do.body ], [ %best_len.0, %lor.lhs.false ], [ %best_len.0, %lor.lhs.false37 ], [ %best_len.0, %lor.lhs.false42 ], [ %sub110, %if.end118 ], [ %best_len.0, %do.end ]
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%scan_end1.1 = phi i8 [ %scan_end1.0, %do.body ], [ %scan_end1.0, %lor.lhs.false ], [ %scan_end1.0, %lor.lhs.false37 ], [ %scan_end1.0, %lor.lhs.false42 ], [ %34, %if.end118 ], [ %scan_end1.0, %do.end ]
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%scan_end.1 = phi i8 [ %scan_end.0, %do.body ], [ %scan_end.0, %lor.lhs.false ], [ %scan_end.0, %lor.lhs.false37 ], [ %scan_end.0, %lor.lhs.false42 ], [ %35, %if.end118 ], [ %scan_end.0, %do.end ]
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%and = and i32 %cur_match.addr.0, %7
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%idxprom126 = zext i32 %and to i64
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%arrayidx127 = getelementptr inbounds i16, i16* %6, i64 %idxprom126
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%36 = load i16, i16* %arrayidx127, align 2
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%conv128 = zext i16 %36 to i32
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%cmp129 = icmp ugt i32 %conv128, %sub6.
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br i1 %cmp129, label %land.rhs131, label %do.end135
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||
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land.rhs131: ; preds = %do.cond125
|
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%dec = add i32 %chain_length.1, -1
|
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|
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%cmp132 = icmp eq i32 %dec, 0
|
||
|
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br i1 %cmp132, label %do.end135, label %do.body
|
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|
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|
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do.end135: ; preds = %land.rhs131, %do.cond125, %if.then114
|
||
|
|
%best_len.2 = phi i32 [ %best_len.1, %land.rhs131 ], [ %best_len.1, %do.cond125 ], [ %sub110, %if.then114 ]
|
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|
|
%cmp137 = icmp ugt i32 %best_len.2, %11
|
||
|
|
%.best_len.2 = select i1 %cmp137, i32 %11, i32 %best_len.2
|
||
|
|
ret i32 %.best_len.2
|
||
|
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}
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