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198d8baafb
llvm-6502/test/CodeGen/X86/zlib-longest-match.ll
David Blaikie 198d8baafb [opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction 
One of several parallel first steps to remove the target type of pointers,
replacing them with a single opaque pointer type.

This adds an explicit type parameter to the gep instruction so that when the
first parameter becomes an opaque pointer type, the type to gep through is
still available to the instructions.

* This doesn't modify gep operators, only instructions (operators will be
  handled separately)

* Textual IR changes only. Bitcode (including upgrade) and changing the
  in-memory representation will be in separate changes.

* geps of vectors are transformed as:
    getelementptr <4 x float*> %x, ...
  ->getelementptr float, <4 x float*> %x, ...
  Then, once the opaque pointer type is introduced, this will ultimately look
  like:
    getelementptr float, <4 x ptr> %x
  with the unambiguous interpretation that it is a vector of pointers to float.

* address spaces remain on the pointer, not the type:
    getelementptr float addrspace(1)* %x
  ->getelementptr float, float addrspace(1)* %x
  Then, eventually:
    getelementptr float, ptr addrspace(1) %x

Importantly, the massive amount of test case churn has been automated by
same crappy python code. I had to manually update a few test cases that
wouldn't fit the script's model (r228970,r229196,r229197,r229198). The
python script just massages stdin and writes the result to stdout, I
then wrapped that in a shell script to handle replacing files, then
using the usual find+xargs to migrate all the files.

update.py:
import fileinput
import sys
import re

ibrep = re.compile(r"(^.*?[^%\w]getelementptr inbounds )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))")
normrep = re.compile(       r"(^.*?[^%\w]getelementptr )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))")

def conv(match, line):
  if not match:
    return line
  line = match.groups()[0]
  if len(match.groups()[5]) == 0:
    line += match.groups()[2]
  line += match.groups()[3]
  line += ", "
  line += match.groups()[1]
  line += "\n"
  return line

for line in sys.stdin:
  if line.find("getelementptr ") == line.find("getelementptr inbounds"):
    if line.find("getelementptr inbounds") != line.find("getelementptr inbounds ("):
      line = conv(re.match(ibrep, line), line)
  elif line.find("getelementptr ") != line.find("getelementptr ("):
    line = conv(re.match(normrep, line), line)
  sys.stdout.write(line)

apply.sh:
for name in "$@"
do
  python3 `dirname "$0"`/update.py < "$name" > "$name.tmp" && mv "$name.tmp" "$name"
  rm -f "$name.tmp"
done

The actual commands:
From llvm/src:
find test/ -name *.ll | xargs ./apply.sh
From llvm/src/tools/clang:
find test/ -name *.mm -o -name *.m -o -name *.cpp -o -name *.c | xargs -I '{}' ../../apply.sh "{}"
From llvm/src/tools/polly:
find test/ -name *.ll | xargs ./apply.sh

After that, check-all (with llvm, clang, clang-tools-extra, lld,
compiler-rt, and polly all checked out).

The extra 'rm' in the apply.sh script is due to a few files in clang's test
suite using interesting unicode stuff that my python script was throwing
exceptions on. None of those files needed to be migrated, so it seemed
sufficient to ignore those cases.

Reviewers: rafael, dexonsmith, grosser

Differential Revision: http://reviews.llvm.org/D7636

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230786 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-27 19:29:02 +00:00

241 lines
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LLVM
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; RUN: llc -march=x86-64 < %s -block-placement-exit-block-bias=20 | FileCheck %s
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"
target triple = "x86_64-apple-macosx10.9.0"
; This is longest_match, the hot function from zlib's deflate implementation.
%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 }
%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 }
%struct.gz_header_s = type { i32, i64, i32, i32, i8*, i32, i32, i8*, i32, i8*, i32, i32, i32 }
%struct.ct_data_s = type { %union.anon, %union.anon.0 }
%union.anon = type { i16 }
%union.anon.0 = type { i16 }
%struct.tree_desc_s = type { %struct.ct_data_s*, i32, %struct.static_tree_desc_s* }
%struct.static_tree_desc_s = type { i32 }
; CHECK-LABEL: longest_match:
; Verify that there are no spills or reloads in the loop exit block. This loop
; is mostly cold, only %do.cond125 and %land.rhs131 are hot.
; CHECK: %do.cond125
; CHECK-NOT: {{Spill|Reload}}
; CHECK: jbe
; Verify that block placement doesn't destroy source order. It's important that
; the two hot blocks are laid out close to each other.
; CHECK-NEXT: %land.rhs131
; CHECK: jne
; CHECK: jmp
define i32 @longest_match(%struct.internal_state* nocapture %s, i32 %cur_match) nounwind {
entry:
%max_chain_length = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 31
%0 = load i32* %max_chain_length, align 4
%window = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 14
%1 = load i8** %window, align 8
%strstart = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 27
%2 = load i32* %strstart, align 4
%idx.ext = zext i32 %2 to i64
%add.ptr = getelementptr inbounds i8, i8* %1, i64 %idx.ext
%prev_length = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 30
%3 = load i32* %prev_length, align 4
%nice_match1 = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 36
%4 = load i32* %nice_match1, align 4
%w_size = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 11
%5 = load i32* %w_size, align 4
%sub = add i32 %5, -262
%cmp = icmp ugt i32 %2, %sub
%sub6 = sub i32 %2, %sub
%sub6. = select i1 %cmp, i32 %sub6, i32 0
%prev7 = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 16
%6 = load i16** %prev7, align 8
%w_mask = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 13
%7 = load i32* %w_mask, align 4
%add.ptr11.sum = add i64 %idx.ext, 258
%add.ptr12 = getelementptr inbounds i8, i8* %1, i64 %add.ptr11.sum
%sub13 = add nsw i32 %3, -1
%idxprom = sext i32 %sub13 to i64
%add.ptr.sum = add i64 %idxprom, %idx.ext
%arrayidx = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum
%8 = load i8* %arrayidx, align 1
%idxprom14 = sext i32 %3 to i64
%add.ptr.sum213 = add i64 %idxprom14, %idx.ext
%arrayidx15 = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum213
%9 = load i8* %arrayidx15, align 1
%good_match = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 35
%10 = load i32* %good_match, align 4
%cmp17 = icmp ult i32 %3, %10
%shr = lshr i32 %0, 2
%chain_length.0 = select i1 %cmp17, i32 %0, i32 %shr
%lookahead = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 29
%11 = load i32* %lookahead, align 4
%cmp18 = icmp ugt i32 %4, %11
%. = select i1 %cmp18, i32 %11, i32 %4
%match_start = getelementptr inbounds %struct.internal_state, %struct.internal_state* %s, i64 0, i32 28
%add.ptr.sum217 = add i64 %idx.ext, 1
%arrayidx44 = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum217
%add.ptr.sum218 = add i64 %idx.ext, 2
%add.ptr50 = getelementptr inbounds i8, i8* %1, i64 %add.ptr.sum218
%sub.ptr.lhs.cast = ptrtoint i8* %add.ptr12 to i64
br label %do.body
do.body: ; preds = %land.rhs131, %entry
%best_len.0 = phi i32 [ %best_len.1, %land.rhs131 ], [ %3, %entry ]
%chain_length.1 = phi i32 [ %dec, %land.rhs131 ], [ %chain_length.0, %entry ]
%cur_match.addr.0 = phi i32 [ %conv128, %land.rhs131 ], [ %cur_match, %entry ]
%scan_end1.0 = phi i8 [ %scan_end1.1, %land.rhs131 ], [ %8, %entry ]
%scan_end.0 = phi i8 [ %scan_end.1, %land.rhs131 ], [ %9, %entry ]
%idx.ext23 = zext i32 %cur_match.addr.0 to i64
%add.ptr24 = getelementptr inbounds i8, i8* %1, i64 %idx.ext23
%idxprom25 = sext i32 %best_len.0 to i64
%add.ptr24.sum = add i64 %idx.ext23, %idxprom25
%arrayidx26 = getelementptr inbounds i8, i8* %1, i64 %add.ptr24.sum
%12 = load i8* %arrayidx26, align 1
%cmp28 = icmp eq i8 %12, %scan_end.0
br i1 %cmp28, label %lor.lhs.false, label %do.cond125
lor.lhs.false: ; preds = %do.body
%sub30 = add nsw i32 %best_len.0, -1
%idxprom31 = sext i32 %sub30 to i64
%add.ptr24.sum214 = add i64 %idx.ext23, %idxprom31
%arrayidx32 = getelementptr inbounds i8, i8* %1, i64 %add.ptr24.sum214
%13 = load i8* %arrayidx32, align 1
%cmp35 = icmp eq i8 %13, %scan_end1.0
br i1 %cmp35, label %lor.lhs.false37, label %do.cond125
lor.lhs.false37: ; preds = %lor.lhs.false
%14 = load i8* %add.ptr24, align 1
%15 = load i8* %add.ptr, align 1
%cmp40 = icmp eq i8 %14, %15
br i1 %cmp40, label %lor.lhs.false42, label %do.cond125
lor.lhs.false42: ; preds = %lor.lhs.false37
%add.ptr24.sum215 = add i64 %idx.ext23, 1
%incdec.ptr = getelementptr inbounds i8, i8* %1, i64 %add.ptr24.sum215
%16 = load i8* %incdec.ptr, align 1
%17 = load i8* %arrayidx44, align 1
%cmp46 = icmp eq i8 %16, %17
br i1 %cmp46, label %if.end49, label %do.cond125
if.end49: ; preds = %lor.lhs.false42
%incdec.ptr.sum = add i64 %idx.ext23, 2
%incdec.ptr51 = getelementptr inbounds i8, i8* %1, i64 %incdec.ptr.sum
br label %do.cond
do.cond: ; preds = %land.lhs.true100, %if.end49
%match.0 = phi i8* [ %incdec.ptr51, %if.end49 ], [ %incdec.ptr103, %land.lhs.true100 ]
%scan.1 = phi i8* [ %add.ptr50, %if.end49 ], [ %incdec.ptr101, %land.lhs.true100 ]
%incdec.ptr53 = getelementptr inbounds i8, i8* %scan.1, i64 1
%18 = load i8* %incdec.ptr53, align 1
%incdec.ptr55 = getelementptr inbounds i8, i8* %match.0, i64 1
%19 = load i8* %incdec.ptr55, align 1
%cmp57 = icmp eq i8 %18, %19
br i1 %cmp57, label %land.lhs.true, label %do.end
land.lhs.true: ; preds = %do.cond
%incdec.ptr59 = getelementptr inbounds i8, i8* %scan.1, i64 2
%20 = load i8* %incdec.ptr59, align 1
%incdec.ptr61 = getelementptr inbounds i8, i8* %match.0, i64 2
%21 = load i8* %incdec.ptr61, align 1
%cmp63 = icmp eq i8 %20, %21
br i1 %cmp63, label %land.lhs.true65, label %do.end
land.lhs.true65: ; preds = %land.lhs.true
%incdec.ptr66 = getelementptr inbounds i8, i8* %scan.1, i64 3
%22 = load i8* %incdec.ptr66, align 1
%incdec.ptr68 = getelementptr inbounds i8, i8* %match.0, i64 3
%23 = load i8* %incdec.ptr68, align 1
%cmp70 = icmp eq i8 %22, %23
br i1 %cmp70, label %land.lhs.true72, label %do.end
land.lhs.true72: ; preds = %land.lhs.true65
%incdec.ptr73 = getelementptr inbounds i8, i8* %scan.1, i64 4
%24 = load i8* %incdec.ptr73, align 1
%incdec.ptr75 = getelementptr inbounds i8, i8* %match.0, i64 4
%25 = load i8* %incdec.ptr75, align 1
%cmp77 = icmp eq i8 %24, %25
br i1 %cmp77, label %land.lhs.true79, label %do.end
land.lhs.true79: ; preds = %land.lhs.true72
%incdec.ptr80 = getelementptr inbounds i8, i8* %scan.1, i64 5
%26 = load i8* %incdec.ptr80, align 1
%incdec.ptr82 = getelementptr inbounds i8, i8* %match.0, i64 5
%27 = load i8* %incdec.ptr82, align 1
%cmp84 = icmp eq i8 %26, %27
br i1 %cmp84, label %land.lhs.true86, label %do.end
land.lhs.true86: ; preds = %land.lhs.true79
%incdec.ptr87 = getelementptr inbounds i8, i8* %scan.1, i64 6
%28 = load i8* %incdec.ptr87, align 1
%incdec.ptr89 = getelementptr inbounds i8, i8* %match.0, i64 6
%29 = load i8* %incdec.ptr89, align 1
%cmp91 = icmp eq i8 %28, %29
br i1 %cmp91, label %land.lhs.true93, label %do.end
land.lhs.true93: ; preds = %land.lhs.true86
%incdec.ptr94 = getelementptr inbounds i8, i8* %scan.1, i64 7
%30 = load i8* %incdec.ptr94, align 1
%incdec.ptr96 = getelementptr inbounds i8, i8* %match.0, i64 7
%31 = load i8* %incdec.ptr96, align 1
%cmp98 = icmp eq i8 %30, %31
br i1 %cmp98, label %land.lhs.true100, label %do.end
land.lhs.true100: ; preds = %land.lhs.true93
%incdec.ptr101 = getelementptr inbounds i8, i8* %scan.1, i64 8
%32 = load i8* %incdec.ptr101, align 1
%incdec.ptr103 = getelementptr inbounds i8, i8* %match.0, i64 8
%33 = load i8* %incdec.ptr103, align 1
%cmp105 = icmp eq i8 %32, %33
%cmp107 = icmp ult i8* %incdec.ptr101, %add.ptr12
%or.cond = and i1 %cmp105, %cmp107
br i1 %or.cond, label %do.cond, label %do.end
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
%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 ]
%sub.ptr.rhs.cast = ptrtoint i8* %scan.2 to i64
%sub.ptr.sub = sub i64 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
%conv109 = trunc i64 %sub.ptr.sub to i32
%sub110 = sub nsw i32 258, %conv109
%cmp112 = icmp sgt i32 %sub110, %best_len.0
br i1 %cmp112, label %if.then114, label %do.cond125
if.then114: ; preds = %do.end
store i32 %cur_match.addr.0, i32* %match_start, align 4
%cmp115 = icmp slt i32 %sub110, %.
br i1 %cmp115, label %if.end118, label %do.end135
if.end118: ; preds = %if.then114
%sub119 = add nsw i32 %sub110, -1
%idxprom120 = sext i32 %sub119 to i64
%add.ptr111.sum = add i64 %idxprom120, %idx.ext
%arrayidx121 = getelementptr inbounds i8, i8* %1, i64 %add.ptr111.sum
%34 = load i8* %arrayidx121, align 1
%idxprom122 = sext i32 %sub110 to i64
%add.ptr111.sum216 = add i64 %idxprom122, %idx.ext
%arrayidx123 = getelementptr inbounds i8, i8* %1, i64 %add.ptr111.sum216
%35 = load i8* %arrayidx123, align 1
br label %do.cond125
do.cond125: ; preds = %if.end118, %do.end, %lor.lhs.false42, %lor.lhs.false37, %lor.lhs.false, %do.body
%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 ]
%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 ]
%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 ]
%and = and i32 %cur_match.addr.0, %7
%idxprom126 = zext i32 %and to i64
%arrayidx127 = getelementptr inbounds i16, i16* %6, i64 %idxprom126
%36 = load i16* %arrayidx127, align 2
%conv128 = zext i16 %36 to i32
%cmp129 = icmp ugt i32 %conv128, %sub6.
br i1 %cmp129, label %land.rhs131, label %do.end135
land.rhs131: ; preds = %do.cond125
%dec = add i32 %chain_length.1, -1
%cmp132 = icmp eq i32 %dec, 0
br i1 %cmp132, label %do.end135, label %do.body
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 ]
%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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