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198d8baafb
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
108 lines
5.0 KiB
LLVM
108 lines
5.0 KiB
LLVM
; RUN: llc -O0 -mtriple=x86_64-apple-darwin -filetype=asm %s -o - | FileCheck %s
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; Ensure that we generate an indirect location for the variable length array a.
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; CHECK: ##DEBUG_VALUE: vla:a <- RDX
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; CHECK: DW_OP_breg1
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; rdar://problem/13658587
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;
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; generated from:
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;
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; int vla(int n) {
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; int a[n];
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; a[0] = 42;
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; return a[n-1];
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; }
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;
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; int main(int argc, char** argv) {
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; return vla(argc);
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; }
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; ModuleID = 'vla.c'
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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-macosx10.8.0"
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; Function Attrs: nounwind ssp uwtable
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define i32 @vla(i32 %n) nounwind ssp uwtable {
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entry:
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%n.addr = alloca i32, align 4
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%saved_stack = alloca i8*
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%cleanup.dest.slot = alloca i32
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store i32 %n, i32* %n.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %n.addr, metadata !15, metadata !{!"0x102"}), !dbg !16
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%0 = load i32* %n.addr, align 4, !dbg !17
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%1 = zext i32 %0 to i64, !dbg !17
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%2 = call i8* @llvm.stacksave(), !dbg !17
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store i8* %2, i8** %saved_stack, !dbg !17
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%vla = alloca i32, i64 %1, align 16, !dbg !17
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call void @llvm.dbg.declare(metadata i32* %vla, metadata !18, metadata !{!"0x102\006"}), !dbg !17
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%arrayidx = getelementptr inbounds i32, i32* %vla, i64 0, !dbg !22
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store i32 42, i32* %arrayidx, align 4, !dbg !22
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%3 = load i32* %n.addr, align 4, !dbg !23
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%sub = sub nsw i32 %3, 1, !dbg !23
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%idxprom = sext i32 %sub to i64, !dbg !23
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%arrayidx1 = getelementptr inbounds i32, i32* %vla, i64 %idxprom, !dbg !23
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%4 = load i32* %arrayidx1, align 4, !dbg !23
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store i32 1, i32* %cleanup.dest.slot
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%5 = load i8** %saved_stack, !dbg !24
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call void @llvm.stackrestore(i8* %5), !dbg !24
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ret i32 %4, !dbg !23
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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; Function Attrs: nounwind
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declare i8* @llvm.stacksave() nounwind
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; Function Attrs: nounwind
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declare void @llvm.stackrestore(i8*) nounwind
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; Function Attrs: nounwind ssp uwtable
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define i32 @main(i32 %argc, i8** %argv) nounwind ssp uwtable {
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entry:
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%retval = alloca i32, align 4
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%argc.addr = alloca i32, align 4
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%argv.addr = alloca i8**, align 8
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store i32 0, i32* %retval
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store i32 %argc, i32* %argc.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !25, metadata !{!"0x102"}), !dbg !26
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store i8** %argv, i8*** %argv.addr, align 8
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call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !27, metadata !{!"0x102"}), !dbg !26
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%0 = load i32* %argc.addr, align 4, !dbg !28
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%call = call i32 @vla(i32 %0), !dbg !28
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ret i32 %call, !dbg !28
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!29}
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!0 = !{!"0x11\0012\00clang version 3.3 \000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/vla.c] [DW_LANG_C99]
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!1 = !{!"vla.c", !""}
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!2 = !{}
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!3 = !{!4, !9}
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!4 = !{!"0x2e\00vla\00vla\00\001\000\001\000\006\00256\000\001", !1, !5, !6, null, i32 (i32)* @vla, null, null, !2} ; [ DW_TAG_subprogram ] [line 1] [def] [vla]
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!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/vla.c]
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!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!7 = !{!8, !8}
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!8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!9 = !{!"0x2e\00main\00main\00\007\000\001\000\006\00256\000\007", !1, !5, !10, null, i32 (i32, i8**)* @main, null, null, !2} ; [ DW_TAG_subprogram ] [line 7] [def] [main]
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!10 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !11, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!11 = !{!8, !8, !12}
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!12 = !{!"0xf\00\000\0064\0064\000\000", null, null, !13} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ]
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!13 = !{!"0xf\00\000\0064\0064\000\000", null, null, !14} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from char]
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!14 = !{!"0x24\00char\000\008\008\000\000\006", null, null} ; [ DW_TAG_base_type ] [char] [line 0, size 8, align 8, offset 0, enc DW_ATE_signed_char]
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!15 = !{!"0x101\00n\0016777217\000", !4, !5, !8} ; [ DW_TAG_arg_variable ] [n] [line 1]
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!16 = !MDLocation(line: 1, scope: !4)
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!17 = !MDLocation(line: 2, scope: !4)
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!18 = !{!"0x100\00a\002\000", !4, !5, !19} ; [ DW_TAG_auto_variable ] [a] [line 2]
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!19 = !{!"0x1\00\000\000\0032\000\000", null, null, !8, !20, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 32, offset 0] [from int]
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!20 = !{!21}
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!21 = !{!"0x21\000\00-1"} ; [ DW_TAG_subrange_type ] [unbounded]
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!22 = !MDLocation(line: 3, scope: !4)
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!23 = !MDLocation(line: 4, scope: !4)
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!24 = !MDLocation(line: 5, scope: !4)
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!25 = !{!"0x101\00argc\0016777223\000", !9, !5, !8} ; [ DW_TAG_arg_variable ] [argc] [line 7]
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!26 = !MDLocation(line: 7, scope: !9)
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!27 = !{!"0x101\00argv\0033554439\000", !9, !5, !12} ; [ DW_TAG_arg_variable ] [argv] [line 7]
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!28 = !MDLocation(line: 8, scope: !9)
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!29 = !{i32 1, !"Debug Info Version", i32 2}
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