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clang-p2996/llvm/test/Transforms/FunctionAttrs/align.ll
Johannes Doerfert 3ab9e8b818 [Attributor][Fix] Initialize the cache prior to using it 
Summary:
There were segfaults as we modified and iterated the instruction maps in
the cache at the same time. This was happening because we created new
instructions while we populated the cache. This fix changes the order
in which we perform these actions. First, the caches for the whole
module are created, then we start to create abstract attributes.

I don't have a unit test but the LLVM test suite exposes this problem.

Reviewers: uenoku, sstefan1

Subscribers: hiraditya, bollu, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67232

llvm-svn: 372105
2019-09-17 10:52:41 +00:00

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; RUN: opt -attributor -attributor-manifest-internal -attributor-disable=false -attributor-max-iterations-verify -attributor-max-iterations=6 -S < %s | FileCheck %s --check-prefix=ATTRIBUTOR
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; Test cases specifically designed for "align" attribute.
; We use FIXME's to indicate problems and missing attributes.
; TEST 1
; ATTRIBUTOR: define align 8 i32* @test1(i32* returned align 8 "no-capture-maybe-returned" %0)
define i32* @test1(i32* align 8 %0) #0 {
ret i32* %0
}
; TEST 2
; ATTRIBUTOR: define i32* @test2(i32* returned "no-capture-maybe-returned" %0)
define i32* @test2(i32* %0) #0 {
ret i32* %0
}
; TEST 3
; ATTRIBUTOR: define align 4 i32* @test3(i32* align 8 "no-capture-maybe-returned" %0, i32* align 4 "no-capture-maybe-returned" %1, i1 %2)
define i32* @test3(i32* align 8 %0, i32* align 4 %1, i1 %2) #0 {
%ret = select i1 %2, i32* %0, i32* %1
ret i32* %ret
}
; TEST 4
; ATTRIBUTOR: define align 32 i32* @test4(i32* align 32 "no-capture-maybe-returned" %0, i32* align 32 "no-capture-maybe-returned" %1, i1 %2)
define i32* @test4(i32* align 32 %0, i32* align 32 %1, i1 %2) #0 {
%ret = select i1 %2, i32* %0, i32* %1
ret i32* %ret
}
; TEST 5
declare i32* @unknown()
declare align 8 i32* @align8()
; ATTRIBUTOR: define align 8 i32* @test5_1()
define i32* @test5_1() {
%ret = tail call align 8 i32* @unknown()
ret i32* %ret
}
; ATTRIBUTOR: define align 8 i32* @test5_2()
define i32* @test5_2() {
%ret = tail call i32* @align8()
ret i32* %ret
}
; TEST 6
; SCC
; ATTRIBUTOR: define noalias nonnull align 536870912 dereferenceable(4294967295) i32* @test6_1()
define i32* @test6_1() #0 {
%ret = tail call i32* @test6_2()
ret i32* %ret
}
; ATTRIBUTOR: define noalias nonnull align 536870912 dereferenceable(4294967295) i32* @test6_2()
define i32* @test6_2() #0 {
%ret = tail call i32* @test6_1()
ret i32* %ret
}
; char a1 __attribute__((aligned(8)));
; char a2 __attribute__((aligned(16)));
;
; char* f1(char* a ){
; return a?a:f2(&a1);
; }
; char* f2(char* a){
; return a?f1(a):f3(&a2);
; }
;
; char* f3(char* a){
; return a?&a1: f1(&a2);
; }
@a1 = common global i8 0, align 8
@a2 = common global i8 0, align 16
; Function Attrs: nounwind readnone ssp uwtable
define internal i8* @f1(i8* readnone %0) local_unnamed_addr #0 {
; ATTRIBUTOR: define internal nonnull align 8 dereferenceable(1) i8* @f1(i8* nonnull readnone align 8 dereferenceable(1) "no-capture-maybe-returned" %0)
%2 = icmp eq i8* %0, null
br i1 %2, label %3, label %5
; <label>:3: ; preds = %1
; ATTRIBUTOR: %4 = tail call align 8 i8* @f2(i8* nonnull align 8 dereferenceable(1) @a1)
%4 = tail call i8* @f2(i8* nonnull @a1)
; ATTRIBUTOR: %l = load i8, i8* %4, align 8
%l = load i8, i8* %4
br label %5
; <label>:5: ; preds = %1, %3
%6 = phi i8* [ %4, %3 ], [ %0, %1 ]
ret i8* %6
}
; Function Attrs: nounwind readnone ssp uwtable
define internal i8* @f2(i8* readnone %0) local_unnamed_addr #0 {
; ATTRIBUTOR: define internal nonnull align 8 dereferenceable(1) i8* @f2(i8* nonnull readnone align 8 dereferenceable(1) "no-capture-maybe-returned" %0)
%2 = icmp eq i8* %0, null
br i1 %2, label %5, label %3
; <label>:3: ; preds = %1
; ATTRIBUTOR: %4 = tail call i8* @f1(i8* nonnull align 8 dereferenceable(1) "no-capture-maybe-returned" @a1)
%4 = tail call i8* @f1(i8* nonnull %0)
br label %7
; <label>:5: ; preds = %1
; ATTRIBUTOR: %6 = tail call i8* @f3(i8* nonnull align 16 dereferenceable(1) @a2)
%6 = tail call i8* @f3(i8* nonnull @a2)
br label %7
; <label>:7: ; preds = %5, %3
%8 = phi i8* [ %4, %3 ], [ %6, %5 ]
ret i8* %8
}
; Function Attrs: nounwind readnone ssp uwtable
define internal i8* @f3(i8* readnone %0) local_unnamed_addr #0 {
; ATTRIBUTOR: define internal nonnull align 8 dereferenceable(1) i8* @f3(i8* nocapture nonnull readnone align 16 dereferenceable(1) %0)
%2 = icmp eq i8* %0, null
br i1 %2, label %3, label %5
; <label>:3: ; preds = %1
; ATTRIBUTOR: %4 = tail call i8* @f1(i8* nonnull align 16 dereferenceable(1) @a2)
%4 = tail call i8* @f1(i8* nonnull @a2)
br label %5
; <label>:5: ; preds = %1, %3
%6 = phi i8* [ %4, %3 ], [ @a1, %1 ]
ret i8* %6
}
; TEST 7
; Better than IR information
; ATTRIBUTOR: define align 32 i32* @test7(i32* returned align 32 "no-capture-maybe-returned" %p)
define align 4 i32* @test7(i32* align 32 %p) #0 {
tail call i8* @f1(i8* align 8 dereferenceable(1) @a1)
ret i32* %p
}
; TEST 8
define void @test8_helper() {
%ptr0 = tail call i32* @unknown()
%ptr1 = tail call align 4 i32* @unknown()
%ptr2 = tail call align 8 i32* @unknown()
tail call void @test8(i32* %ptr1, i32* %ptr1, i32* %ptr0)
; ATTRIBUTOR: tail call void @test8(i32* align 4 %ptr1, i32* align 4 %ptr1, i32* %ptr0)
tail call void @test8(i32* %ptr2, i32* %ptr1, i32* %ptr1)
; ATTRIBUTOR: tail call void @test8(i32* align 8 %ptr2, i32* align 4 %ptr1, i32* align 4 %ptr1)
tail call void @test8(i32* %ptr2, i32* %ptr1, i32* %ptr1)
; ATTRIBUTOR: tail call void @test8(i32* align 8 %ptr2, i32* align 4 %ptr1, i32* align 4 %ptr1)
ret void
}
define internal void @test8(i32* %a, i32* %b, i32* %c) {
; ATTRIBUTOR: define internal void @test8(i32* nocapture align 4 %a, i32* nocapture align 4 %b, i32* nocapture %c)
ret void
}
declare void @test9_helper(i32* %A)
define void @test9_traversal(i1 %c, i32* align 4 %B, i32* align 8 %C) {
%sel = select i1 %c, i32* %B, i32* %C
call void @test9_helper(i32* %sel)
ret void
}
; FIXME: This will work with an upcoming patch (D66618 or similar)
; define align 32 i32* @test10a(i32* align 32 "no-capture-maybe-returned" %p)
; ATTRIBUTOR: define i32* @test10a(i32* align 32 "no-capture-maybe-returned" %p)
define i32* @test10a(i32* align 32 %p) {
; ATTRIBUTOR: %l = load i32, i32* %p, align 32
%l = load i32, i32* %p
%c = icmp eq i32 %l, 0
br i1 %c, label %t, label %f
t:
%r = call i32* @test10a(i32* %p)
; FIXME: This will work with an upcoming patch (D66618 or similar)
; store i32 1, i32* %r, align 32
; ATTRIBUTOR: store i32 1, i32* %r
store i32 1, i32* %r
%g0 = getelementptr i32, i32* %p, i32 8
br label %e
f:
%g1 = getelementptr i32, i32* %p, i32 8
; FIXME: This will work with an upcoming patch (D66618 or similar)
; store i32 -1, i32* %g1, align 32
; ATTRIBUTOR: store i32 -1, i32* %g1
store i32 -1, i32* %g1
br label %e
e:
%phi = phi i32* [%g0, %t], [%g1, %f]
ret i32* %phi
}
; FIXME: This will work with an upcoming patch (D66618 or similar)
; define align 32 i32* @test10b(i32* align 32 "no-capture-maybe-returned" %p)
; ATTRIBUTOR: define i32* @test10b(i32* align 32 "no-capture-maybe-returned" %p)
define i32* @test10b(i32* align 32 %p) {
; ATTRIBUTOR: %l = load i32, i32* %p, align 32
%l = load i32, i32* %p
%c = icmp eq i32 %l, 0
br i1 %c, label %t, label %f
t:
%r = call i32* @test10b(i32* %p)
; FIXME: This will work with an upcoming patch (D66618 or similar)
; store i32 1, i32* %r, align 32
; ATTRIBUTOR: store i32 1, i32* %r
store i32 1, i32* %r
%g0 = getelementptr i32, i32* %p, i32 8
br label %e
f:
%g1 = getelementptr i32, i32* %p, i32 -8
; FIXME: This will work with an upcoming patch (D66618 or similar)
; store i32 -1, i32* %g1, align 32
; ATTRIBUTOR: store i32 -1, i32* %g1
store i32 -1, i32* %g1
br label %e
e:
%phi = phi i32* [%g0, %t], [%g1, %f]
ret i32* %phi
}
attributes #0 = { nounwind uwtable noinline }
attributes #1 = { uwtable noinline }
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