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llvm-mirror/test/Transforms/LoopSimplify/phi-node-simplify.ll
David Blaikie 3ea2df7c7b [opaque pointer type] Add textual IR support for explicit type parameter to gep operator
Similar to gep (r230786) and load (r230794) changes.

Similar migration script can be used to update test cases, which
successfully migrated all of LLVM and Polly, but about 4 test cases
needed manually changes in Clang.

(this script will read the contents of stdin and massage it into stdout
- wrap it in the 'apply.sh' script shown in previous commits + xargs to
apply it over a large set of test cases)

import fileinput
import sys
import re

rep = re.compile(r"(getelementptr(?:\s+inbounds)?\s*\()((<\d*\s+x\s+)?([^@]*?)(|\s*addrspace\(\d+\))\s*\*(?(3)>)\s*)(?=$|%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|zeroinitializer|<|\[\[[a-zA-Z]|\{\{)", re.MULTILINE | re.DOTALL)

def conv(match):
  line = match.group(1)
  line += match.group(4)
  line += ", "
  line += match.group(2)
  return line

line = sys.stdin.read()
off = 0
for match in re.finditer(rep, line):
  sys.stdout.write(line[off:match.start()])
  sys.stdout.write(conv(match))
  off = match.end()
sys.stdout.write(line[off:])

llvm-svn: 232184
2015-03-13 18:20:45 +00:00

56 lines
3.1 KiB
LLVM

; Loop Simplify should turn phi nodes like X = phi [X, Y] into just Y, eliminating them.
; RUN: opt < %s -loop-simplify -S | grep phi | count 6
@A = weak global [3000000 x i32] zeroinitializer ; <[3000000 x i32]*> [#uses=1]
@B = weak global [20000 x i32] zeroinitializer ; <[20000 x i32]*> [#uses=1]
@C = weak global [100 x i32] zeroinitializer ; <[100 x i32]*> [#uses=1]
@Z = weak global i32 0 ; <i32*> [#uses=2]
define i32 @main() {
entry:
tail call void @__main( )
br label %loopentry.1
loopentry.1: ; preds = %loopexit.1, %entry
%indvar20 = phi i32 [ 0, %entry ], [ %indvar.next21, %loopexit.1 ] ; <i32> [#uses=1]
%a.1 = phi i32* [ getelementptr ([3000000 x i32], [3000000 x i32]* @A, i32 0, i32 0), %entry ], [ %inc.0, %loopexit.1 ] ; <i32*> [#uses=1]
br label %no_exit.2
no_exit.2: ; preds = %loopexit.2, %no_exit.2, %loopentry.1
%a.0.4.ph = phi i32* [ %a.1, %loopentry.1 ], [ %inc.0, %loopexit.2 ], [ %a.0.4.ph, %no_exit.2 ] ; <i32*> [#uses=3]
%b.1.4.ph = phi i32* [ getelementptr ([20000 x i32], [20000 x i32]* @B, i32 0, i32 0), %loopentry.1 ], [ %inc.1, %loopexit.2 ], [ %b.1.4.ph, %no_exit.2 ] ; <i32*> [#uses=3]
%indvar17 = phi i32 [ 0, %loopentry.1 ], [ %indvar.next18, %loopexit.2 ], [ %indvar17, %no_exit.2 ] ; <i32> [#uses=2]
%indvar = phi i32 [ %indvar.next, %no_exit.2 ], [ 0, %loopexit.2 ], [ 0, %loopentry.1 ] ; <i32> [#uses=5]
%b.1.4.rec = bitcast i32 %indvar to i32 ; <i32> [#uses=1]
%gep.upgrd.1 = zext i32 %indvar to i64 ; <i64> [#uses=1]
%c.2.4 = getelementptr [100 x i32], [100 x i32]* @C, i32 0, i64 %gep.upgrd.1 ; <i32*> [#uses=1]
%gep.upgrd.2 = zext i32 %indvar to i64 ; <i64> [#uses=1]
%a.0.4 = getelementptr i32, i32* %a.0.4.ph, i64 %gep.upgrd.2 ; <i32*> [#uses=1]
%gep.upgrd.3 = zext i32 %indvar to i64 ; <i64> [#uses=1]
%b.1.4 = getelementptr i32, i32* %b.1.4.ph, i64 %gep.upgrd.3 ; <i32*> [#uses=1]
%inc.0.rec = add i32 %b.1.4.rec, 1 ; <i32> [#uses=2]
%inc.0 = getelementptr i32, i32* %a.0.4.ph, i32 %inc.0.rec ; <i32*> [#uses=2]
%tmp.13 = load i32, i32* %a.0.4 ; <i32> [#uses=1]
%inc.1 = getelementptr i32, i32* %b.1.4.ph, i32 %inc.0.rec ; <i32*> [#uses=1]
%tmp.15 = load i32, i32* %b.1.4 ; <i32> [#uses=1]
%tmp.18 = load i32, i32* %c.2.4 ; <i32> [#uses=1]
%tmp.16 = mul i32 %tmp.15, %tmp.13 ; <i32> [#uses=1]
%tmp.19 = mul i32 %tmp.16, %tmp.18 ; <i32> [#uses=1]
%tmp.20 = load i32, i32* @Z ; <i32> [#uses=1]
%tmp.21 = add i32 %tmp.19, %tmp.20 ; <i32> [#uses=1]
store i32 %tmp.21, i32* @Z
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, 100 ; <i1> [#uses=1]
br i1 %exitcond, label %loopexit.2, label %no_exit.2
loopexit.2: ; preds = %no_exit.2
%indvar.next18 = add i32 %indvar17, 1 ; <i32> [#uses=2]
%exitcond19 = icmp eq i32 %indvar.next18, 200 ; <i1> [#uses=1]
br i1 %exitcond19, label %loopexit.1, label %no_exit.2
loopexit.1: ; preds = %loopexit.2
%indvar.next21 = add i32 %indvar20, 1 ; <i32> [#uses=2]
%exitcond22 = icmp eq i32 %indvar.next21, 300 ; <i1> [#uses=1]
br i1 %exitcond22, label %return, label %loopentry.1
return: ; preds = %loopexit.1
ret i32 undef
}
declare void @__main()