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llvm-project/llvm/test/Transforms/LoopUnswitch/preserve-analyses.ll

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Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID This is done to avoid odd test failures, like the one fixed in r171243. llvm-svn: 171250
2012-12-30 10:33:22 +08:00
; RUN: opt -loop-unswitch -verify-loop-info -verify-dom-info -disable-output < %s
Re-apply r80926, with fixes: keep the domtree informed of new blocks that get created during loop unswitching, and fix SplitBlockPredecessors' LCSSA updating code to create new PHIs instead of trying to just move existing ones. Also, optimize Loop::verifyLoop, since it gets called a lot. Use searches on a sorted list of blocks instead of calling the "contains" function, as is done in other places in the Loop class, since "contains" does a linear search. Also, don't call verifyLoop from LoopSimplify or LCSSA, as the PassManager is already calling verifyLoop as part of LoopInfo's verifyAnalysis. llvm-svn: 81221
2009-09-08 23:45:00 +08:00
; Loop unswitch should be able to unswitch these loops and
; preserve LCSSA and LoopSimplify forms.
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:64"
target triple = "armv6-apple-darwin9"
@delim1 = external global i32 ; <i32*> [#uses=1]
@delim2 = external global i32 ; <i32*> [#uses=1]
Remove arm_apcscc from the test files. It is the default and doing this matches what llvm-gcc and clang now produce. llvm-svn: 106221
2010-06-17 23:18:27 +08:00
define i32 @ineqn(i8* %s, i8* %p) nounwind readonly {
Re-apply r80926, with fixes: keep the domtree informed of new blocks that get created during loop unswitching, and fix SplitBlockPredecessors' LCSSA updating code to create new PHIs instead of trying to just move existing ones. Also, optimize Loop::verifyLoop, since it gets called a lot. Use searches on a sorted list of blocks instead of calling the "contains" function, as is done in other places in the Loop class, since "contains" does a linear search. Also, don't call verifyLoop from LoopSimplify or LCSSA, as the PassManager is already calling verifyLoop as part of LoopInfo's verifyAnalysis. llvm-svn: 81221
2009-09-08 23:45:00 +08:00
entry:
%0 = load i32* @delim1, align 4 ; <i32> [#uses=1]
%1 = load i32* @delim2, align 4 ; <i32> [#uses=1]
br label %bb8.outer
bb: ; preds = %bb8
%2 = icmp eq i8* %p_addr.0, %s ; <i1> [#uses=1]
br i1 %2, label %bb10, label %bb2
bb2: ; preds = %bb
[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 inbounds i8, i8* %p_addr.0, i32 1 ; <i8*> [#uses=3]
Re-apply r80926, with fixes: keep the domtree informed of new blocks that get created during loop unswitching, and fix SplitBlockPredecessors' LCSSA updating code to create new PHIs instead of trying to just move existing ones. Also, optimize Loop::verifyLoop, since it gets called a lot. Use searches on a sorted list of blocks instead of calling the "contains" function, as is done in other places in the Loop class, since "contains" does a linear search. Also, don't call verifyLoop from LoopSimplify or LCSSA, as the PassManager is already calling verifyLoop as part of LoopInfo's verifyAnalysis. llvm-svn: 81221
2009-09-08 23:45:00 +08:00
switch i32 %ineq.0.ph, label %bb8.backedge [
i32 0, label %bb3
i32 1, label %bb6
]
bb8.backedge: ; preds = %bb6, %bb5, %bb2
br label %bb8
bb3: ; preds = %bb2
%4 = icmp eq i32 %8, %0 ; <i1> [#uses=1]
br i1 %4, label %bb8.outer.loopexit, label %bb5
bb5: ; preds = %bb3
br i1 %6, label %bb6, label %bb8.backedge
bb6: ; preds = %bb5, %bb2
%5 = icmp eq i32 %8, %1 ; <i1> [#uses=1]
br i1 %5, label %bb7, label %bb8.backedge
bb7: ; preds = %bb6
%.lcssa1 = phi i8* [ %3, %bb6 ] ; <i8*> [#uses=1]
br label %bb8.outer.backedge
bb8.outer.backedge: ; preds = %bb8.outer.loopexit, %bb7
%.lcssa2 = phi i8* [ %.lcssa1, %bb7 ], [ %.lcssa, %bb8.outer.loopexit ] ; <i8*> [#uses=1]
%ineq.0.ph.be = phi i32 [ 0, %bb7 ], [ 1, %bb8.outer.loopexit ] ; <i32> [#uses=1]
br label %bb8.outer
bb8.outer.loopexit: ; preds = %bb3
%.lcssa = phi i8* [ %3, %bb3 ] ; <i8*> [#uses=1]
br label %bb8.outer.backedge
bb8.outer: ; preds = %bb8.outer.backedge, %entry
%ineq.0.ph = phi i32 [ 0, %entry ], [ %ineq.0.ph.be, %bb8.outer.backedge ] ; <i32> [#uses=3]
%p_addr.0.ph = phi i8* [ %p, %entry ], [ %.lcssa2, %bb8.outer.backedge ] ; <i8*> [#uses=1]
%6 = icmp eq i32 %ineq.0.ph, 1 ; <i1> [#uses=1]
br label %bb8
bb8: ; preds = %bb8.outer, %bb8.backedge
%p_addr.0 = phi i8* [ %p_addr.0.ph, %bb8.outer ], [ %3, %bb8.backedge ] ; <i8*> [#uses=3]
%7 = load i8* %p_addr.0, align 1 ; <i8> [#uses=2]
%8 = sext i8 %7 to i32 ; <i32> [#uses=2]
%9 = icmp eq i8 %7, 0 ; <i1> [#uses=1]
br i1 %9, label %bb10, label %bb
bb10: ; preds = %bb8, %bb
%.0 = phi i32 [ %ineq.0.ph, %bb ], [ 0, %bb8 ] ; <i32> [#uses=1]
ret i32 %.0
}
; This is a simplified form of ineqn from above. It triggers some
; different cases in the loop-unswitch code.
define void @simplified_ineqn() nounwind readonly {
entry:
br label %bb8.outer
bb8.outer: ; preds = %bb6, %bb2, %entry
%x = phi i32 [ 0, %entry ], [ 0, %bb6 ], [ 1, %bb2 ] ; <i32> [#uses=1]
br i1 undef, label %return, label %bb2
bb2: ; preds = %bb
switch i32 %x, label %bb6 [
i32 0, label %bb8.outer
]
bb6: ; preds = %bb2
br i1 undef, label %bb8.outer, label %bb2
return: ; preds = %bb8, %bb
ret void
}
Fix SplitCriticalEdge to properly update LCSSA form when splitting a loop exit edge -- new PHIs may be needed not only for the additional splits that are made to preserve LoopSimplify form, but also for the original split. Factor out the code that inserts new PHIs so that it can be used for both. Remove LoopRotation.cpp's code for manually updating LCSSA form, as it is now redundant. This fixes PR4934. llvm-svn: 81363
2009-09-10 02:18:18 +08:00
; This function requires special handling to preserve LCSSA form.
; PR4934
define void @pnp_check_irq() nounwind noredzone {
entry:
%conv56 = trunc i64 undef to i32 ; <i32> [#uses=1]
br label %while.cond.i
while.cond.i: ; preds = %while.cond.i.backedge, %entry
%call.i25 = call i8* @pci_get_device() nounwind noredzone ; <i8*> [#uses=2]
br i1 undef, label %if.then65, label %while.body.i
while.body.i: ; preds = %while.cond.i
br i1 undef, label %if.then31.i.i, label %while.cond.i.backedge
while.cond.i.backedge: ; preds = %if.then31.i.i, %while.body.i
br label %while.cond.i
if.then31.i.i: ; preds = %while.body.i
switch i32 %conv56, label %while.cond.i.backedge [
i32 14, label %if.then42.i.i
i32 15, label %if.then42.i.i
]
if.then42.i.i: ; preds = %if.then31.i.i, %if.then31.i.i
%call.i25.lcssa48 = phi i8* [ %call.i25, %if.then31.i.i ], [ %call.i25, %if.then31.i.i ] ; <i8*> [#uses=0]
unreachable
if.then65: ; preds = %while.cond.i
unreachable
}
declare i8* @pci_get_device() noredzone