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llvm-6502/test/Transforms/IndVarSimplify/udiv.ll
David Blaikie 32b845d223 [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 
See r230786 and r230794 for similar changes to gep and load
respectively.

Call is a bit different because it often doesn't have a single explicit
type - usually the type is deduced from the arguments, and just the
return type is explicit. In those cases there's no need to change the
IR.

When that's not the case, the IR usually contains the pointer type of
the first operand - but since typed pointers are going away, that
representation is insufficient so I'm just stripping the "pointerness"
of the explicit type away.

This does make the IR a bit weird - it /sort of/ reads like the type of
the first operand: "call void () %x(" but %x is actually of type "void
()*" and will eventually be just of type "ptr". But this seems not too
bad and I don't think it would benefit from repeating the type
("void (), void () * %x(" and then eventually "void (), ptr %x(") as has
been done with gep and load.

This also has a side benefit: since the explicit type is no longer a
pointer, there's no ambiguity between an explicit type and a function
that returns a function pointer. Previously this case needed an explicit
type (eg: a function returning a void() function was written as
"call void () () * @x(" rather than "call void () * @x(" because of the
ambiguity between a function returning a pointer to a void() function
and a function returning void).

No ambiguity means even function pointer return types can just be
written alone, without writing the whole function's type.

This leaves /only/ the varargs case where the explicit type is required.

Given the special type syntax in call instructions, the regex-fu used
for migration was a bit more involved in its own unique way (as every
one of these is) so here it is. Use it in conjunction with the apply.sh
script and associated find/xargs commands I've provided in rr230786 to
migrate your out of tree tests. Do let me know if any of this doesn't
cover your cases & we can iterate on a more general script/regexes to
help others with out of tree tests.

About 9 test cases couldn't be automatically migrated - half of those
were functions returning function pointers, where I just had to manually
delete the function argument types now that we didn't need an explicit
function type there. The other half were typedefs of function types used
in calls - just had to manually drop the * from those.

import fileinput
import sys
import re

pat = re.compile(r'((?:=|:|^|\s)call\s(?:[^@]*?))(\s*$|\s*(?:(?:\[\[[a-zA-Z0-9_]+\]\]|[@%](?:(")?[\\\?@a-zA-Z0-9_.]*?(?(3)"|)|{{.*}}))(?:\(|$)|undef|inttoptr|bitcast|null|asm).*$)')
addrspace_end = re.compile(r"addrspace\(\d+\)\s*\*$")
func_end = re.compile("(?:void.*|\)\s*)\*$")

def conv(match, line):
  if not match or re.search(addrspace_end, match.group(1)) or not re.search(func_end, match.group(1)):
    return line
  return line[:match.start()] + match.group(1)[:match.group(1).rfind('*')].rstrip() + match.group(2) + line[match.end():]

for line in sys.stdin:
  sys.stdout.write(conv(re.search(pat, line), line))

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235145 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-16 23:24:18 +00:00

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; RUN: opt -indvars -S < %s | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
@main.flags = internal global [8193 x i8] zeroinitializer, align 1 ; <[8193 x i8]*> [#uses=5]
@.str = private constant [11 x i8] c"Count: %d\0A\00" ; <[11 x i8]*> [#uses=1]
; Indvars shouldn't emit a udiv here, because there's no udiv in the
; original code. This comes from SingleSource/Benchmarks/Shootout/sieve.c.
; CHECK-LABEL: @main(
; CHECK-NOT: div
define i32 @main(i32 %argc, i8** nocapture %argv) nounwind {
entry:
%cmp = icmp eq i32 %argc, 2 ; <i1> [#uses=1]
br i1 %cmp, label %cond.true, label %while.cond.preheader
cond.true: ; preds = %entry
%arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1 ; <i8**> [#uses=1]
%tmp2 = load i8*, i8** %arrayidx ; <i8*> [#uses=1]
%call = tail call i32 @atoi(i8* %tmp2) nounwind readonly ; <i32> [#uses=1]
br label %while.cond.preheader
while.cond.preheader: ; preds = %entry, %cond.true
%NUM.0.ph = phi i32 [ %call, %cond.true ], [ 170000, %entry ] ; <i32> [#uses=2]
%tobool18 = icmp eq i32 %NUM.0.ph, 0 ; <i1> [#uses=1]
br i1 %tobool18, label %while.end, label %bb.nph30
while.cond.loopexit: ; preds = %for.cond12.while.cond.loopexit_crit_edge, %for.cond12.loopexit
%count.2.lcssa = phi i32 [ %count.1.lcssa, %for.cond12.while.cond.loopexit_crit_edge ], [ 0, %for.cond12.loopexit ] ; <i32> [#uses=1]
br label %while.cond
while.cond: ; preds = %while.cond.loopexit
%tobool = icmp eq i32 %dec19, 0 ; <i1> [#uses=1]
br i1 %tobool, label %while.cond.while.end_crit_edge, label %for.cond.preheader
while.cond.while.end_crit_edge: ; preds = %while.cond
%count.2.lcssa.lcssa = phi i32 [ %count.2.lcssa, %while.cond ] ; <i32> [#uses=1]
br label %while.end
bb.nph30: ; preds = %while.cond.preheader
br label %for.cond.preheader
for.cond.preheader: ; preds = %bb.nph30, %while.cond
%dec19.in = phi i32 [ %NUM.0.ph, %bb.nph30 ], [ %dec19, %while.cond ] ; <i32> [#uses=1]
%dec19 = add i32 %dec19.in, -1 ; <i32> [#uses=2]
br i1 true, label %bb.nph, label %for.cond12.loopexit
for.cond: ; preds = %for.body
%cmp8 = icmp slt i64 %inc, 8193 ; <i1> [#uses=1]
br i1 %cmp8, label %for.body, label %for.cond.for.cond12.loopexit_crit_edge
for.cond.for.cond12.loopexit_crit_edge: ; preds = %for.cond
br label %for.cond12.loopexit
bb.nph: ; preds = %for.cond.preheader
br label %for.body
for.body: ; preds = %bb.nph, %for.cond
%i.02 = phi i64 [ 2, %bb.nph ], [ %inc, %for.cond ] ; <i64> [#uses=2]
%arrayidx10 = getelementptr inbounds [8193 x i8], [8193 x i8]* @main.flags, i64 0, i64 %i.02 ; <i8*> [#uses=1]
store i8 1, i8* %arrayidx10
%inc = add nsw i64 %i.02, 1 ; <i64> [#uses=2]
br label %for.cond
for.cond12.loopexit: ; preds = %for.cond.for.cond12.loopexit_crit_edge, %for.cond.preheader
br i1 true, label %bb.nph16, label %while.cond.loopexit
for.cond12: ; preds = %for.inc35
%cmp14 = icmp slt i64 %inc37, 8193 ; <i1> [#uses=1]
br i1 %cmp14, label %for.body15, label %for.cond12.while.cond.loopexit_crit_edge
for.cond12.while.cond.loopexit_crit_edge: ; preds = %for.cond12
%count.1.lcssa = phi i32 [ %count.1, %for.cond12 ] ; <i32> [#uses=1]
br label %while.cond.loopexit
bb.nph16: ; preds = %for.cond12.loopexit
br label %for.body15
for.body15: ; preds = %bb.nph16, %for.cond12
%count.212 = phi i32 [ 0, %bb.nph16 ], [ %count.1, %for.cond12 ] ; <i32> [#uses=2]
%i.17 = phi i64 [ 2, %bb.nph16 ], [ %inc37, %for.cond12 ] ; <i64> [#uses=4]
%arrayidx17 = getelementptr inbounds [8193 x i8], [8193 x i8]* @main.flags, i64 0, i64 %i.17 ; <i8*> [#uses=1]
%tmp18 = load i8, i8* %arrayidx17 ; <i8> [#uses=1]
%tobool19 = icmp eq i8 %tmp18, 0 ; <i1> [#uses=1]
br i1 %tobool19, label %for.inc35, label %if.then
if.then: ; preds = %for.body15
%add = shl i64 %i.17, 1 ; <i64> [#uses=2]
%cmp243 = icmp slt i64 %add, 8193 ; <i1> [#uses=1]
br i1 %cmp243, label %bb.nph5, label %for.end32
for.cond22: ; preds = %for.body25
%cmp24 = icmp slt i64 %add31, 8193 ; <i1> [#uses=1]
br i1 %cmp24, label %for.body25, label %for.cond22.for.end32_crit_edge
for.cond22.for.end32_crit_edge: ; preds = %for.cond22
br label %for.end32
bb.nph5: ; preds = %if.then
br label %for.body25
for.body25: ; preds = %bb.nph5, %for.cond22
%k.04 = phi i64 [ %add, %bb.nph5 ], [ %add31, %for.cond22 ] ; <i64> [#uses=2]
%arrayidx27 = getelementptr inbounds [8193 x i8], [8193 x i8]* @main.flags, i64 0, i64 %k.04 ; <i8*> [#uses=1]
store i8 0, i8* %arrayidx27
%add31 = add nsw i64 %k.04, %i.17 ; <i64> [#uses=2]
br label %for.cond22
for.end32: ; preds = %for.cond22.for.end32_crit_edge, %if.then
%inc34 = add nsw i32 %count.212, 1 ; <i32> [#uses=1]
br label %for.inc35
for.inc35: ; preds = %for.body15, %for.end32
%count.1 = phi i32 [ %inc34, %for.end32 ], [ %count.212, %for.body15 ] ; <i32> [#uses=2]
%inc37 = add nsw i64 %i.17, 1 ; <i64> [#uses=2]
br label %for.cond12
while.end: ; preds = %while.cond.while.end_crit_edge, %while.cond.preheader
%count.0.lcssa = phi i32 [ %count.2.lcssa.lcssa, %while.cond.while.end_crit_edge ], [ 0, %while.cond.preheader ] ; <i32> [#uses=1]
%call40 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 %count.0.lcssa) nounwind ; <i32> [#uses=0]
ret i32 0
}
declare i32 @atoi(i8* nocapture) nounwind readonly
declare i32 @printf(i8* nocapture, ...) nounwind
; IndVars shouldn't be afraid to emit a udiv here, since there's a udiv in
; the original code.
; CHECK-LABEL: @foo(
; CHECK: for.body.preheader:
; CHECK-NEXT: udiv
define void @foo(double* %p, i64 %n) nounwind {
entry:
%div0 = udiv i64 %n, 7 ; <i64> [#uses=1]
%div1 = add i64 %div0, 1
%cmp2 = icmp ult i64 0, %div1 ; <i1> [#uses=1]
br i1 %cmp2, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%i.03 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ] ; <i64> [#uses=2]
%arrayidx = getelementptr inbounds double, double* %p, i64 %i.03 ; <double*> [#uses=1]
store double 0.000000e+00, double* %arrayidx
%inc = add i64 %i.03, 1 ; <i64> [#uses=2]
%divx = udiv i64 %n, 7 ; <i64> [#uses=1]
%div = add i64 %divx, 1
%cmp = icmp ult i64 %inc, %div ; <i1> [#uses=1]
br i1 %cmp, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}
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