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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
260 lines
7.6 KiB
LLVM
260 lines
7.6 KiB
LLVM
; RUN: opt -instsimplify -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@g1 = global i32 0, align 4
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@g2 = internal global i32 0, align 4
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@g3 = unnamed_addr global i32 0, align 4
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@g4 = hidden global i32 0, align 4
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@g5 = protected global i32 0, align 4
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@g6 = thread_local unnamed_addr global i32 0, align 4
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; Make sure we can simplify away a pointer comparison between
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; dynamically-allocated memory and a local stack allocation.
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; void p()
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; {
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; int *mData;
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; int mStackData[10];
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; mData = new int[12];
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; if (mData != mStackData) {
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; delete[] mData;
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; }
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; }
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define void @_Z2p1v() #0 {
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%mStackData = alloca [10 x i32], align 16
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%1 = bitcast [10 x i32]* %mStackData to i8*
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%2 = tail call noalias i8* @_Znam(i64 48) #4
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%3 = bitcast i8* %2 to i32*
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%4 = getelementptr inbounds [10 x i32], [10 x i32]* %mStackData, i64 0, i64 0
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%5 = icmp eq i32* %3, %4
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br i1 %5, label %7, label %6
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; CHECK-LABEL: @_Z2p1v
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; CHECK-NOT: icmp
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; CHECK: ret void
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; <label>:6 ; preds = %0
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call void @_ZdaPv(i8* %2) #5
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br label %7
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; <label>:7 ; preds = %0, %6
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ret void
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}
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; Also check a more-complicated case with multiple underlying objects.
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define void @_Z2p2bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
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%mStackData = alloca [10 x i32], align 16
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%1 = bitcast [10 x i32]* %mStackData to i8*
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%2 = getelementptr inbounds [10 x i32], [10 x i32]* %mStackData, i64 0, i64 0
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%3 = select i1 %b1, i32* %2, i32* @g2
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%4 = tail call noalias i8* @_Znam(i64 48) #4
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%5 = tail call noalias i8* @_Znam(i64 48) #4
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%.v = select i1 %b2, i8* %4, i8* %5
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%6 = bitcast i8* %.v to i32*
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%7 = icmp eq i32* %6, %3
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br i1 %7, label %9, label %8
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; CHECK-LABEL: @_Z2p2bb
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; CHECK-NOT: icmp
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; CHECK: ret void
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; <label>:8 ; preds = %0
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call void @_ZdaPv(i8* %4) #5
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call void @_ZdaPv(i8* %5) #5
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br label %9
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; <label>:9 ; preds = %0, %8
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ret void
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}
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define void @_Z2p4bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
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%mStackData = alloca [10 x i32], align 16
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%1 = bitcast [10 x i32]* %mStackData to i8*
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%2 = getelementptr inbounds [10 x i32], [10 x i32]* %mStackData, i64 0, i64 0
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%3 = select i1 %b1, i32* %2, i32* @g3
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%4 = tail call noalias i8* @_Znam(i64 48) #4
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%5 = tail call noalias i8* @_Znam(i64 48) #4
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%.v = select i1 %b2, i8* %4, i8* %5
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%6 = bitcast i8* %.v to i32*
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%7 = icmp eq i32* %6, %3
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br i1 %7, label %9, label %8
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; CHECK-LABEL: @_Z2p4bb
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; CHECK-NOT: icmp
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; CHECK: ret void
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; <label>:8 ; preds = %0
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call void @_ZdaPv(i8* %4) #5
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call void @_ZdaPv(i8* %5) #5
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br label %9
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; <label>:9 ; preds = %0, %8
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ret void
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}
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define void @_Z2p5bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
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%mStackData = alloca [10 x i32], align 16
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%1 = bitcast [10 x i32]* %mStackData to i8*
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%2 = getelementptr inbounds [10 x i32], [10 x i32]* %mStackData, i64 0, i64 0
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%3 = select i1 %b1, i32* %2, i32* @g4
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%4 = tail call noalias i8* @_Znam(i64 48) #4
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%5 = tail call noalias i8* @_Znam(i64 48) #4
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%.v = select i1 %b2, i8* %4, i8* %5
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%6 = bitcast i8* %.v to i32*
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%7 = icmp eq i32* %6, %3
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br i1 %7, label %9, label %8
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; CHECK-LABEL: @_Z2p5bb
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; CHECK-NOT: icmp
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; CHECK: ret void
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; <label>:8 ; preds = %0
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call void @_ZdaPv(i8* %4) #5
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call void @_ZdaPv(i8* %5) #5
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br label %9
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; <label>:9 ; preds = %0, %8
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ret void
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}
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define void @_Z2p6bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
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%mStackData = alloca [10 x i32], align 16
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%1 = bitcast [10 x i32]* %mStackData to i8*
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%2 = getelementptr inbounds [10 x i32], [10 x i32]* %mStackData, i64 0, i64 0
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%3 = select i1 %b1, i32* %2, i32* @g5
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%4 = tail call noalias i8* @_Znam(i64 48) #4
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%5 = tail call noalias i8* @_Znam(i64 48) #4
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%.v = select i1 %b2, i8* %4, i8* %5
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%6 = bitcast i8* %.v to i32*
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%7 = icmp eq i32* %6, %3
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br i1 %7, label %9, label %8
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; CHECK-LABEL: @_Z2p6bb
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; CHECK-NOT: icmp
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; CHECK: ret void
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; <label>:8 ; preds = %0
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call void @_ZdaPv(i8* %4) #5
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call void @_ZdaPv(i8* %5) #5
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br label %9
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; <label>:9 ; preds = %0, %8
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ret void
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}
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; Here's another case involving multiple underlying objects, but this time we
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; must keep the comparison (it might involve a regular pointer-typed function
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; argument).
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define void @_Z4nopebbPi(i1 zeroext %b1, i1 zeroext %b2, i32* readnone %q) #0 {
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%mStackData = alloca [10 x i32], align 16
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%1 = bitcast [10 x i32]* %mStackData to i8*
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%2 = getelementptr inbounds [10 x i32], [10 x i32]* %mStackData, i64 0, i64 0
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%3 = select i1 %b1, i32* %2, i32* %q
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%4 = tail call noalias i8* @_Znam(i64 48) #4
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%5 = tail call noalias i8* @_Znam(i64 48) #4
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%.v = select i1 %b2, i8* %4, i8* %5
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%6 = bitcast i8* %.v to i32*
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%7 = icmp eq i32* %6, %3
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br i1 %7, label %9, label %8
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; CHECK-LABEL: @_Z4nopebbPi
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; CHECK: icmp
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; CHECK: ret void
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; <label>:8 ; preds = %0
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call void @_ZdaPv(i8* %4) #5
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call void @_ZdaPv(i8* %5) #5
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br label %9
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; <label>:9 ; preds = %0, %8
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ret void
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}
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define void @_Z2p3bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
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%mStackData = alloca [10 x i32], align 16
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%1 = bitcast [10 x i32]* %mStackData to i8*
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%2 = getelementptr inbounds [10 x i32], [10 x i32]* %mStackData, i64 0, i64 0
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%3 = select i1 %b1, i32* %2, i32* @g1
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%4 = tail call noalias i8* @_Znam(i64 48) #4
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%5 = tail call noalias i8* @_Znam(i64 48) #4
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%.v = select i1 %b2, i8* %4, i8* %5
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%6 = bitcast i8* %.v to i32*
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%7 = icmp eq i32* %6, %3
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br i1 %7, label %9, label %8
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; CHECK-LABEL: @_Z2p3bb
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; CHECK: icmp
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; CHECK: ret void
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; <label>:8 ; preds = %0
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call void @_ZdaPv(i8* %4) #5
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call void @_ZdaPv(i8* %5) #5
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br label %9
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; <label>:9 ; preds = %0, %8
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ret void
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}
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define void @_Z2p7bb(i1 zeroext %b1, i1 zeroext %b2) #0 {
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%mStackData = alloca [10 x i32], align 16
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%1 = bitcast [10 x i32]* %mStackData to i8*
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%2 = getelementptr inbounds [10 x i32], [10 x i32]* %mStackData, i64 0, i64 0
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%3 = select i1 %b1, i32* %2, i32* @g6
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%4 = tail call noalias i8* @_Znam(i64 48) #4
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%5 = tail call noalias i8* @_Znam(i64 48) #4
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%.v = select i1 %b2, i8* %4, i8* %5
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%6 = bitcast i8* %.v to i32*
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%7 = icmp eq i32* %6, %3
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br i1 %7, label %9, label %8
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; CHECK-LABEL: @_Z2p7bb
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; CHECK: icmp
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; CHECK: ret void
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; <label>:8 ; preds = %0
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call void @_ZdaPv(i8* %4) #5
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call void @_ZdaPv(i8* %5) #5
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br label %9
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; <label>:9 ; preds = %0, %8
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ret void
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}
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define void @_Z2p2v(i32 %c) #0 {
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%mStackData = alloca [10 x i32], i32 %c, align 16
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%1 = bitcast [10 x i32]* %mStackData to i8*
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%2 = tail call noalias i8* @_Znam(i64 48) #4
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%3 = bitcast i8* %2 to i32*
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%4 = getelementptr inbounds [10 x i32], [10 x i32]* %mStackData, i64 0, i64 0
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%5 = icmp eq i32* %3, %4
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br i1 %5, label %7, label %6
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; CHECK-LABEL: @_Z2p2v
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; CHECK: icmp
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; CHECK: ret void
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; <label>:6 ; preds = %0
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call void @_ZdaPv(i8* %2) #5
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br label %7
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; <label>:7 ; preds = %0, %6
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ret void
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}
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; Function Attrs: nobuiltin
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declare noalias i8* @_Znam(i64) #2
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; Function Attrs: nobuiltin nounwind
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declare void @_ZdaPv(i8*) #3
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attributes #0 = { uwtable }
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attributes #1 = { nounwind }
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attributes #2 = { nobuiltin }
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attributes #3 = { nobuiltin nounwind }
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attributes #4 = { builtin }
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attributes #5 = { builtin nounwind }
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