llvm-project/llvm/test/Transforms/IndVarSimplify/loop_evaluate8.ll

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; RUN: opt < %s -indvars -S | not grep select
; This loop has backedge-taken-count zero. Indvars shouldn't expand any
; instructions to compute a trip count.
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
target triple = "i386-pc-linux-gnu"
define i8* @string_expandtabs() nounwind {
entry:
br i1 undef, label %bb33, label %bb1
bb1: ; preds = %entry
br i1 undef, label %overflow1, label %bb15
bb15: ; preds = %bb1
br i1 undef, label %bb33, label %bb17
bb17: ; preds = %bb15
br label %bb30
bb19: ; preds = %bb30
br i1 undef, label %bb20, label %bb29
bb20: ; preds = %bb19
%0 = load i32* undef, align 4 ; <i32> [#uses=1]
%1 = sub i32 %0, undef ; <i32> [#uses=1]
br label %bb23
bb21: ; preds = %bb23
%2 = icmp ult i8* %q.0, undef ; <i1> [#uses=1]
br i1 %2, label %bb22, label %overflow2
bb22: ; preds = %bb21
[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
%3 = getelementptr i8, i8* %q.0, i32 1 ; <i8*> [#uses=1]
br label %bb23
bb23: ; preds = %bb22, %bb20
%i.2 = phi i32 [ %1, %bb20 ], [ %4, %bb22 ] ; <i32> [#uses=1]
%q.0 = phi i8* [ undef, %bb20 ], [ %3, %bb22 ] ; <i8*> [#uses=3]
%4 = add i32 %i.2, -1 ; <i32> [#uses=2]
%5 = icmp eq i32 %4, -1 ; <i1> [#uses=1]
br i1 %5, label %bb29, label %bb21
bb29: ; preds = %bb23, %bb19
%q.1 = phi i8* [ undef, %bb19 ], [ %q.0, %bb23 ] ; <i8*> [#uses=0]
br label %bb30
bb30: ; preds = %bb29, %bb17
br i1 undef, label %bb19, label %bb33
overflow2: ; preds = %bb21
br i1 undef, label %bb32, label %overflow1
bb32: ; preds = %overflow2
br label %overflow1
overflow1: ; preds = %bb32, %overflow2, %bb1
ret i8* null
bb33: ; preds = %bb30, %bb15, %entry
ret i8* undef
}