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llvm-project/llvm/test/Transforms/AlignmentFromAssumptions/start-unk.ll

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[AlignmentFromAssumptions] Don't divide by zero for unknown starting alignment The routine that determines an alignment given some SCEV returns zero if the answer is unknown. In a case where we could determine the increment of an AddRec but not the starting alignment, we would compute the integer modulus by zero (which is illegal and traps). Prevent this by returning early if either the start or increment alignment is unknown (zero). llvm-svn: 217544
2014-09-11 05:05:52 +08:00
; RUN: opt -alignment-from-assumptions -S < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
%type1 = type { %type2 }
%type2 = type { [4 x i8] }
; Function Attrs: nounwind
declare void @llvm.assume(i1) #0
; Function Attrs: nounwind readnone
declare i32 @llvm.bswap.i32(i32) #1
; Function Attrs: nounwind uwtable
define void @test1() unnamed_addr #2 align 2 {
; CHECK-LABEL: @test1
entry:
br i1 undef, label %if.then, label %if.end
if.then: ; preds = %entry
unreachable
if.end: ; preds = %entry
br i1 undef, label %return, label %if.end8
if.end8: ; preds = %if.end
br i1 undef, label %if.then13, label %if.end14
if.then13: ; preds = %if.end8
unreachable
if.end14: ; preds = %if.end8
br i1 undef, label %cond.false.i129, label %cond.end.i136
cond.false.i129: ; preds = %if.end14
unreachable
cond.end.i136: ; preds = %if.end14
br i1 undef, label %land.lhs.true.i, label %if.end.i145
land.lhs.true.i: ; preds = %cond.end.i136
br i1 undef, label %if.end.i145, label %if.then.i137
if.then.i137: ; preds = %land.lhs.true.i
br i1 undef, label %cond.false8.i, label %cond.end9.i
cond.false8.i: ; preds = %if.then.i137
unreachable
cond.end9.i: ; preds = %if.then.i137
br i1 undef, label %if.then23, label %if.end24
if.end.i145: ; preds = %land.lhs.true.i, %cond.end.i136
unreachable
if.then23: ; preds = %cond.end9.i
unreachable
if.end24: ; preds = %cond.end9.i
br i1 undef, label %for.end, label %for.body.lr.ph
for.body.lr.ph: ; preds = %if.end24
unreachable
for.end: ; preds = %if.end24
br i1 undef, label %if.end123, label %if.then121
if.then121: ; preds = %for.end
unreachable
if.end123: ; preds = %for.end
br i1 undef, label %if.end150, label %if.then126
if.then126: ; preds = %if.end123
%ptrint.i.i185 = ptrtoint %type1* undef to i64
%maskedptr.i.i186 = and i64 %ptrint.i.i185, 1
%maskcond.i.i187 = icmp eq i64 %maskedptr.i.i186, 0
tail call void @llvm.assume(i1 %maskcond.i.i187) #0
%ret.0..sroa_cast.i.i188 = bitcast %type1* undef to i32*
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction Essentially the same as the GEP change in r230786. A similar migration script can be used to update test cases, though a few more test case improvements/changes were required this time around: (r229269-r229278) import fileinput import sys import re pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)") for line in sys.stdin: sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line)) Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7649 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%ret.0.copyload.i.i189 = load i32, i32* %ret.0..sroa_cast.i.i188, align 2
[AlignmentFromAssumptions] Don't divide by zero for unknown starting alignment The routine that determines an alignment given some SCEV returns zero if the answer is unknown. In a case where we could determine the increment of an AddRec but not the starting alignment, we would compute the integer modulus by zero (which is illegal and traps). Prevent this by returning early if either the start or increment alignment is unknown (zero). llvm-svn: 217544
2014-09-11 05:05:52 +08:00
; CHECK: load {{.*}} align 2
%0 = tail call i32 @llvm.bswap.i32(i32 %ret.0.copyload.i.i189) #0
%conv131 = zext i32 %0 to i64
[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 llvm-svn: 230786
2015-02-28 03:29:02 +08:00
%add.ptr132 = getelementptr inbounds i8, i8* undef, i64 %conv131
[AlignmentFromAssumptions] Don't divide by zero for unknown starting alignment The routine that determines an alignment given some SCEV returns zero if the answer is unknown. In a case where we could determine the increment of an AddRec but not the starting alignment, we would compute the integer modulus by zero (which is illegal and traps). Prevent this by returning early if either the start or increment alignment is unknown (zero). llvm-svn: 217544
2014-09-11 05:05:52 +08:00
%1 = bitcast i8* %add.ptr132 to %type1*
br i1 undef, label %if.end150, label %if.end.i173
if.end.i173: ; preds = %if.then126
br i1 undef, label %test1.exit, label %cond.false.i.i.i.i174
cond.false.i.i.i.i174: ; preds = %if.end.i173
unreachable
test1.exit: ; preds = %if.end.i173
br i1 undef, label %test1a.exit, label %if.end.i124
if.end.i124: ; preds = %test1.exit
unreachable
test1a.exit: ; preds = %test1.exit
br i1 undef, label %if.end150, label %for.body137.lr.ph
for.body137.lr.ph: ; preds = %test1a.exit
br label %for.body137
for.body137: ; preds = %test1b.exit, %for.body137.lr.ph
%ShndxTable.0309 = phi %type1* [ %1, %for.body137.lr.ph ], [ %incdec.ptr, %test1b.exit ]
%ret.0..sroa_cast.i.i106 = bitcast %type1* %ShndxTable.0309 to i32*
br i1 undef, label %for.body137.if.end146_crit_edge, label %if.then140
for.body137.if.end146_crit_edge: ; preds = %for.body137
[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 llvm-svn: 230786
2015-02-28 03:29:02 +08:00
%incdec.ptr = getelementptr inbounds %type1, %type1* %ShndxTable.0309, i64 1
[AlignmentFromAssumptions] Don't divide by zero for unknown starting alignment The routine that determines an alignment given some SCEV returns zero if the answer is unknown. In a case where we could determine the increment of an AddRec but not the starting alignment, we would compute the integer modulus by zero (which is illegal and traps). Prevent this by returning early if either the start or increment alignment is unknown (zero). llvm-svn: 217544
2014-09-11 05:05:52 +08:00
br i1 undef, label %cond.false.i70, label %cond.end.i
if.then140: ; preds = %for.body137
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction Essentially the same as the GEP change in r230786. A similar migration script can be used to update test cases, though a few more test case improvements/changes were required this time around: (r229269-r229278) import fileinput import sys import re pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)") for line in sys.stdin: sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line)) Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7649 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%ret.0.copyload.i.i102 = load i32, i32* %ret.0..sroa_cast.i.i106, align 2
[AlignmentFromAssumptions] Don't divide by zero for unknown starting alignment The routine that determines an alignment given some SCEV returns zero if the answer is unknown. In a case where we could determine the increment of an AddRec but not the starting alignment, we would compute the integer modulus by zero (which is illegal and traps). Prevent this by returning early if either the start or increment alignment is unknown (zero). llvm-svn: 217544
2014-09-11 05:05:52 +08:00
; CHECK: load {{.*}} align 2
unreachable
cond.false.i70: ; preds = %for.body137.if.end146_crit_edge
unreachable
cond.end.i: ; preds = %for.body137.if.end146_crit_edge
br i1 undef, label %test1b.exit, label %cond.false.i.i
cond.false.i.i: ; preds = %cond.end.i
unreachable
test1b.exit: ; preds = %cond.end.i
br i1 undef, label %if.end150, label %for.body137
if.end150: ; preds = %test1b.exit, %test1a.exit, %if.then126, %if.end123
br i1 undef, label %for.end176, label %for.body155.lr.ph
for.body155.lr.ph: ; preds = %if.end150
unreachable
for.end176: ; preds = %if.end150
unreachable
return: ; preds = %if.end
ret void
}
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }
attributes #2 = { nounwind uwtable }