2014-01-09 20:26:12 +08:00
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; RUN: opt -loop-reduce -S < %s | FileCheck %s
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; PR18000
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target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@a = global i32 0, align 4
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@b = common global i32 0, align 4
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@e = common global i8 0, align 1
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@d = common global i32 0, align 4
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@c = common global i32 0, align 4
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@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
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; Function Attrs: nounwind optsize uwtable
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; CHECK-LABEL: foo
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define i32 @foo() {
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entry:
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2015-02-28 05:17:42 +08:00
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%.pr = load i32, i32* @b, align 4
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2014-01-09 20:26:12 +08:00
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%cmp10 = icmp slt i32 %.pr, 1
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br i1 %cmp10, label %for.cond1.preheader.lr.ph, label %entry.for.end9_crit_edge
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entry.for.end9_crit_edge: ; preds = %entry
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2015-02-28 05:17:42 +08:00
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%.pre = load i32, i32* @c, align 4
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2014-01-09 20:26:12 +08:00
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br label %for.end9
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for.cond1.preheader.lr.ph: ; preds = %entry
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2015-02-28 05:17:42 +08:00
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%0 = load i32, i32* @a, align 4
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2014-01-09 20:26:12 +08:00
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%tobool = icmp eq i32 %0, 0
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br i1 %tobool, label %for.cond1.preheader.for.cond1.preheader.split_crit_edge, label %return.loopexit.split
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for.cond1.preheader.for.cond1.preheader.split_crit_edge: ; preds = %for.cond1.preheader.lr.ph, %for.inc8
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%1 = phi i32 [ %inc, %for.inc8 ], [ %.pr, %for.cond1.preheader.lr.ph ]
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br label %if.end
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; CHECK-LABEL: if.end
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if.end: ; preds = %if.end, %for.cond1.preheader.for.cond1.preheader.split_crit_edge
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; CHECK: %lsr.iv = phi i32 [ %lsr.iv.next, %if.end ], [ 258, %for.cond1.preheader.for.cond1.preheader.split_crit_edge ]
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%indvars.iv = phi i32 [ 1, %for.cond1.preheader.for.cond1.preheader.split_crit_edge ], [ %indvars.iv.next, %if.end ]
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%2 = phi i8 [ 1, %for.cond1.preheader.for.cond1.preheader.split_crit_edge ], [ %dec, %if.end ]
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%conv7 = mul i32 %indvars.iv, 258
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%shl = and i32 %conv7, 510
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store i32 %shl, i32* @c, align 4
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Bugfix: SCEVExpander incorrectly marks increment operations as no-wrap
(The change was landed in r230280 and caused the regression PR22674.
This version contains a fix and a test-case for PR22674).
When emitting the increment operation, SCEVExpander marks the
operation as nuw or nsw based on the flags on the preincrement SCEV.
This is incorrect because, for instance, it is possible that {-6,+,1}
is <nuw> while {-6,+,1}+1 = {-5,+,1} is not.
This change teaches SCEV to mark the increment as nuw/nsw only if it
can explicitly prove that the increment operation won't overflow.
Apart from the attached test case, another (more realistic)
manifestation of the bug can be seen in
Transforms/IndVarSimplify/pr20680.ll.
Differential Revision: http://reviews.llvm.org/D7778
llvm-svn: 230533
2015-02-26 04:02:59 +08:00
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; CHECK: %lsr.iv.next = add nsw i32 %lsr.iv, -258
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2014-01-09 20:26:12 +08:00
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%dec = add i8 %2, -1
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%cmp2 = icmp sgt i8 %dec, -1
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%indvars.iv.next = add i32 %indvars.iv, -1
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br i1 %cmp2, label %if.end, label %for.inc8
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for.inc8: ; preds = %if.end
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store i32 0, i32* @d, align 4
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%inc = add nsw i32 %1, 1
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store i32 %inc, i32* @b, align 4
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%cmp = icmp slt i32 %1, 0
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br i1 %cmp, label %for.cond1.preheader.for.cond1.preheader.split_crit_edge, label %for.cond.for.end9_crit_edge
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for.cond.for.end9_crit_edge: ; preds = %for.inc8
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store i8 %dec, i8* @e, align 1
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br label %for.end9
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for.end9: ; preds = %entry.for.end9_crit_edge, %for.cond.for.end9_crit_edge
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%3 = phi i32 [ %.pre, %entry.for.end9_crit_edge ], [ %shl, %for.cond.for.end9_crit_edge ]
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[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))
llvm-svn: 235145
2015-04-17 07:24:18 +08:00
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%call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %3) #2
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2014-01-09 20:26:12 +08:00
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br label %return
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return.loopexit.split: ; preds = %for.cond1.preheader.lr.ph
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store i8 1, i8* @e, align 1
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store i32 0, i32* @d, align 4
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br label %return
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return: ; preds = %return.loopexit.split, %for.end9
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%retval.0 = phi i32 [ 0, %for.end9 ], [ 1, %return.loopexit.split ]
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ret i32 %retval.0
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}
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; Function Attrs: nounwind optsize
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declare i32 @printf(i8* nocapture readonly, ...)
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