2010-05-27 21:09:06 +02:00
|
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
2007-04-14 02:19:36 +02:00
|
|
|
; PR1201
|
|
|
|
define i32 @main(i32 %argc, i8** %argv) {
|
2013-07-14 03:42:54 +02:00
|
|
|
; CHECK-LABEL: @main(
|
2011-06-17 05:14:27 +02:00
|
|
|
%c_19 = alloca i8*
|
2015-03-13 19:20:45 +01:00
|
|
|
%malloc_206 = tail call i8* @malloc(i32 mul (i32 ptrtoint (i8* getelementptr (i8, i8* null, i32 1) to i32), i32 10))
|
2011-06-17 05:14:27 +02:00
|
|
|
store i8* %malloc_206, i8** %c_19
|
2015-02-27 22:17:42 +01:00
|
|
|
%tmp_207 = load i8*, i8** %c_19
|
2011-06-17 05:14:27 +02:00
|
|
|
tail call void @free(i8* %tmp_207)
|
|
|
|
ret i32 0
|
2012-07-07 01:09:25 +02:00
|
|
|
; CHECK-NEXT: ret i32 0
|
2007-04-14 02:19:36 +02:00
|
|
|
}
|
2010-05-27 21:09:06 +02:00
|
|
|
|
2012-07-07 01:09:25 +02:00
|
|
|
declare noalias i8* @calloc(i32, i32) nounwind
|
2011-08-03 00:08:01 +02:00
|
|
|
declare noalias i8* @malloc(i32)
|
2010-05-27 21:09:06 +02:00
|
|
|
declare void @free(i8*)
|
|
|
|
|
|
|
|
define i1 @foo() {
|
2013-07-14 03:42:54 +02:00
|
|
|
; CHECK-LABEL: @foo(
|
2010-05-27 21:09:06 +02:00
|
|
|
; CHECK-NEXT: ret i1 false
|
|
|
|
%m = call i8* @malloc(i32 1)
|
|
|
|
%z = icmp eq i8* %m, null
|
|
|
|
call void @free(i8* %m)
|
|
|
|
ret i1 %z
|
|
|
|
}
|
2011-08-03 00:08:01 +02:00
|
|
|
|
|
|
|
declare void @llvm.lifetime.start(i64, i8*)
|
|
|
|
declare void @llvm.lifetime.end(i64, i8*)
|
2012-07-07 01:09:25 +02:00
|
|
|
declare i64 @llvm.objectsize.i64(i8*, i1)
|
Change memcpy/memset/memmove to have dest and source alignments.
Note, this was reviewed (and more details are in) http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html
These intrinsics currently have an explicit alignment argument which is
required to be a constant integer. It represents the alignment of the
source and dest, and so must be the minimum of those.
This change allows source and dest to each have their own alignments
by using the alignment attribute on their arguments. The alignment
argument itself is removed.
There are a few places in the code for which the code needs to be
checked by an expert as to whether using only src/dest alignment is
safe. For those places, they currently take the minimum of src/dest
alignments which matches the current behaviour.
For example, code which used to read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 500, i32 8, i1 false)
will now read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %dest, i8* align 8 %src, i32 500, i1 false)
For out of tree owners, I was able to strip alignment from calls using sed by replacing:
(call.*llvm\.memset.*)i32\ [0-9]*\,\ i1 false\)
with:
$1i1 false)
and similarly for memmove and memcpy.
I then added back in alignment to test cases which needed it.
A similar commit will be made to clang which actually has many differences in alignment as now
IRBuilder can generate different source/dest alignments on calls.
In IRBuilder itself, a new argument was added. Instead of calling:
CreateMemCpy(Dst, Src, getInt64(Size), DstAlign, /* isVolatile */ false)
you now call
CreateMemCpy(Dst, Src, getInt64(Size), DstAlign, SrcAlign, /* isVolatile */ false)
There is a temporary class (IntegerAlignment) which takes the source alignment and rejects
implicit conversion from bool. This is to prevent isVolatile here from passing its default
parameter to the source alignment.
Note, changes in future can now be made to codegen. I didn't change anything here, but this
change should enable better memcpy code sequences.
Reviewed by Hal Finkel.
llvm-svn: 253511
2015-11-18 23:17:24 +01:00
|
|
|
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind
|
|
|
|
declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind
|
|
|
|
declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i1) nounwind
|
2011-08-03 00:08:01 +02:00
|
|
|
|
2012-07-07 01:09:25 +02:00
|
|
|
define void @test3(i8* %src) {
|
2013-07-14 03:42:54 +02:00
|
|
|
; CHECK-LABEL: @test3(
|
2011-08-03 00:08:01 +02:00
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
%a = call noalias i8* @malloc(i32 10)
|
|
|
|
call void @llvm.lifetime.start(i64 10, i8* %a)
|
|
|
|
call void @llvm.lifetime.end(i64 10, i8* %a)
|
2012-07-07 01:09:25 +02:00
|
|
|
%size = call i64 @llvm.objectsize.i64(i8* %a, i1 true)
|
|
|
|
store i8 42, i8* %a
|
Change memcpy/memset/memmove to have dest and source alignments.
Note, this was reviewed (and more details are in) http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html
These intrinsics currently have an explicit alignment argument which is
required to be a constant integer. It represents the alignment of the
source and dest, and so must be the minimum of those.
This change allows source and dest to each have their own alignments
by using the alignment attribute on their arguments. The alignment
argument itself is removed.
There are a few places in the code for which the code needs to be
checked by an expert as to whether using only src/dest alignment is
safe. For those places, they currently take the minimum of src/dest
alignments which matches the current behaviour.
For example, code which used to read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 500, i32 8, i1 false)
will now read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %dest, i8* align 8 %src, i32 500, i1 false)
For out of tree owners, I was able to strip alignment from calls using sed by replacing:
(call.*llvm\.memset.*)i32\ [0-9]*\,\ i1 false\)
with:
$1i1 false)
and similarly for memmove and memcpy.
I then added back in alignment to test cases which needed it.
A similar commit will be made to clang which actually has many differences in alignment as now
IRBuilder can generate different source/dest alignments on calls.
In IRBuilder itself, a new argument was added. Instead of calling:
CreateMemCpy(Dst, Src, getInt64(Size), DstAlign, /* isVolatile */ false)
you now call
CreateMemCpy(Dst, Src, getInt64(Size), DstAlign, SrcAlign, /* isVolatile */ false)
There is a temporary class (IntegerAlignment) which takes the source alignment and rejects
implicit conversion from bool. This is to prevent isVolatile here from passing its default
parameter to the source alignment.
Note, changes in future can now be made to codegen. I didn't change anything here, but this
change should enable better memcpy code sequences.
Reviewed by Hal Finkel.
llvm-svn: 253511
2015-11-18 23:17:24 +01:00
|
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %src, i32 32, i1 false)
|
|
|
|
call void @llvm.memmove.p0i8.p0i8.i32(i8* %a, i8* %src, i32 32, i1 false)
|
|
|
|
call void @llvm.memset.p0i8.i32(i8* %a, i8 5, i32 32, i1 false)
|
2012-07-07 01:09:25 +02:00
|
|
|
%alloc2 = call noalias i8* @calloc(i32 5, i32 7) nounwind
|
|
|
|
%z = icmp ne i8* %alloc2, null
|
2011-08-03 00:08:01 +02:00
|
|
|
ret void
|
|
|
|
}
|
2011-08-03 02:43:35 +02:00
|
|
|
|
|
|
|
;; This used to crash.
|
|
|
|
define void @test4() {
|
2013-07-14 03:42:54 +02:00
|
|
|
; CHECK-LABEL: @test4(
|
2011-08-03 02:43:35 +02:00
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
%A = call i8* @malloc(i32 16000)
|
|
|
|
%B = bitcast i8* %A to double*
|
|
|
|
%C = bitcast double* %B to i8*
|
|
|
|
call void @free(i8* %C)
|
|
|
|
ret void
|
|
|
|
}
|
2012-07-07 01:09:25 +02:00
|
|
|
|
2013-07-14 03:42:54 +02:00
|
|
|
; CHECK-LABEL: @test5(
|
2012-07-07 01:09:25 +02:00
|
|
|
define void @test5(i8* %ptr, i8** %esc) {
|
|
|
|
; CHECK-NEXT: call i8* @malloc
|
|
|
|
; CHECK-NEXT: call i8* @malloc
|
|
|
|
; CHECK-NEXT: call i8* @malloc
|
|
|
|
; CHECK-NEXT: call i8* @malloc
|
|
|
|
; CHECK-NEXT: call i8* @malloc
|
|
|
|
; CHECK-NEXT: call i8* @malloc
|
|
|
|
; CHECK-NEXT: call i8* @malloc
|
|
|
|
; CHECK-NEXT: call void @llvm.memcpy
|
|
|
|
; CHECK-NEXT: call void @llvm.memmove
|
|
|
|
; CHECK-NEXT: store
|
|
|
|
; CHECK-NEXT: call void @llvm.memcpy
|
|
|
|
; CHECK-NEXT: call void @llvm.memmove
|
|
|
|
; CHECK-NEXT: call void @llvm.memset
|
|
|
|
; CHECK-NEXT: store volatile
|
|
|
|
; CHECK-NEXT: ret
|
|
|
|
%a = call i8* @malloc(i32 700)
|
|
|
|
%b = call i8* @malloc(i32 700)
|
|
|
|
%c = call i8* @malloc(i32 700)
|
|
|
|
%d = call i8* @malloc(i32 700)
|
|
|
|
%e = call i8* @malloc(i32 700)
|
|
|
|
%f = call i8* @malloc(i32 700)
|
|
|
|
%g = call i8* @malloc(i32 700)
|
Change memcpy/memset/memmove to have dest and source alignments.
Note, this was reviewed (and more details are in) http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html
These intrinsics currently have an explicit alignment argument which is
required to be a constant integer. It represents the alignment of the
source and dest, and so must be the minimum of those.
This change allows source and dest to each have their own alignments
by using the alignment attribute on their arguments. The alignment
argument itself is removed.
There are a few places in the code for which the code needs to be
checked by an expert as to whether using only src/dest alignment is
safe. For those places, they currently take the minimum of src/dest
alignments which matches the current behaviour.
For example, code which used to read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 500, i32 8, i1 false)
will now read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %dest, i8* align 8 %src, i32 500, i1 false)
For out of tree owners, I was able to strip alignment from calls using sed by replacing:
(call.*llvm\.memset.*)i32\ [0-9]*\,\ i1 false\)
with:
$1i1 false)
and similarly for memmove and memcpy.
I then added back in alignment to test cases which needed it.
A similar commit will be made to clang which actually has many differences in alignment as now
IRBuilder can generate different source/dest alignments on calls.
In IRBuilder itself, a new argument was added. Instead of calling:
CreateMemCpy(Dst, Src, getInt64(Size), DstAlign, /* isVolatile */ false)
you now call
CreateMemCpy(Dst, Src, getInt64(Size), DstAlign, SrcAlign, /* isVolatile */ false)
There is a temporary class (IntegerAlignment) which takes the source alignment and rejects
implicit conversion from bool. This is to prevent isVolatile here from passing its default
parameter to the source alignment.
Note, changes in future can now be made to codegen. I didn't change anything here, but this
change should enable better memcpy code sequences.
Reviewed by Hal Finkel.
llvm-svn: 253511
2015-11-18 23:17:24 +01:00
|
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %a, i32 32, i1 false)
|
|
|
|
call void @llvm.memmove.p0i8.p0i8.i32(i8* %ptr, i8* %b, i32 32, i1 false)
|
2012-07-07 01:09:25 +02:00
|
|
|
store i8* %c, i8** %esc
|
Change memcpy/memset/memmove to have dest and source alignments.
Note, this was reviewed (and more details are in) http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html
These intrinsics currently have an explicit alignment argument which is
required to be a constant integer. It represents the alignment of the
source and dest, and so must be the minimum of those.
This change allows source and dest to each have their own alignments
by using the alignment attribute on their arguments. The alignment
argument itself is removed.
There are a few places in the code for which the code needs to be
checked by an expert as to whether using only src/dest alignment is
safe. For those places, they currently take the minimum of src/dest
alignments which matches the current behaviour.
For example, code which used to read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 500, i32 8, i1 false)
will now read:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %dest, i8* align 8 %src, i32 500, i1 false)
For out of tree owners, I was able to strip alignment from calls using sed by replacing:
(call.*llvm\.memset.*)i32\ [0-9]*\,\ i1 false\)
with:
$1i1 false)
and similarly for memmove and memcpy.
I then added back in alignment to test cases which needed it.
A similar commit will be made to clang which actually has many differences in alignment as now
IRBuilder can generate different source/dest alignments on calls.
In IRBuilder itself, a new argument was added. Instead of calling:
CreateMemCpy(Dst, Src, getInt64(Size), DstAlign, /* isVolatile */ false)
you now call
CreateMemCpy(Dst, Src, getInt64(Size), DstAlign, SrcAlign, /* isVolatile */ false)
There is a temporary class (IntegerAlignment) which takes the source alignment and rejects
implicit conversion from bool. This is to prevent isVolatile here from passing its default
parameter to the source alignment.
Note, changes in future can now be made to codegen. I didn't change anything here, but this
change should enable better memcpy code sequences.
Reviewed by Hal Finkel.
llvm-svn: 253511
2015-11-18 23:17:24 +01:00
|
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %d, i8* %ptr, i32 32, i1 true)
|
|
|
|
call void @llvm.memmove.p0i8.p0i8.i32(i8* %e, i8* %ptr, i32 32, i1 true)
|
|
|
|
call void @llvm.memset.p0i8.i32(i8* %f, i8 5, i32 32, i1 true)
|
2012-07-07 01:09:25 +02:00
|
|
|
store volatile i8 4, i8* %g
|
|
|
|
ret void
|
|
|
|
}
|
2013-01-07 19:37:41 +01:00
|
|
|
|
|
|
|
;; When a basic block contains only a call to free and this block is accessed
|
|
|
|
;; through a test of the argument of free against null, move the call in the
|
|
|
|
;; predecessor block.
|
|
|
|
;; Using simplifycfg will remove the empty basic block and the branch operation
|
|
|
|
;; Then, performing a dead elimination will remove the comparison.
|
|
|
|
;; This is what happens with -O1 and upper.
|
2013-07-14 03:42:54 +02:00
|
|
|
; CHECK-LABEL: @test6(
|
2013-01-07 19:37:41 +01:00
|
|
|
define void @test6(i8* %foo) minsize {
|
|
|
|
; CHECK: %tobool = icmp eq i8* %foo, null
|
|
|
|
;; Call to free moved
|
|
|
|
; CHECK-NEXT: tail call void @free(i8* %foo)
|
|
|
|
; CHECK-NEXT: br i1 %tobool, label %if.end, label %if.then
|
|
|
|
; CHECK: if.then:
|
|
|
|
;; Block is now empty and may be simplified by simplifycfg
|
|
|
|
; CHECK-NEXT: br label %if.end
|
|
|
|
; CHECK: if.end:
|
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
entry:
|
|
|
|
%tobool = icmp eq i8* %foo, null
|
|
|
|
br i1 %tobool, label %if.end, label %if.then
|
|
|
|
|
|
|
|
if.then: ; preds = %entry
|
|
|
|
tail call void @free(i8* %foo)
|
|
|
|
br label %if.end
|
|
|
|
|
|
|
|
if.end: ; preds = %entry, %if.then
|
|
|
|
ret void
|
|
|
|
}
|
2013-07-22 01:11:42 +02:00
|
|
|
|
|
|
|
declare i8* @_ZnwmRKSt9nothrow_t(i64, i8*) nobuiltin
|
|
|
|
declare void @_ZdlPvRKSt9nothrow_t(i8*, i8*) nobuiltin
|
|
|
|
declare i32 @__gxx_personality_v0(...)
|
|
|
|
declare void @_ZN1AC2Ev(i8* %this)
|
|
|
|
|
|
|
|
; CHECK-LABEL: @test7(
|
2015-06-17 22:52:32 +02:00
|
|
|
define void @test7() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
|
2013-07-22 01:11:42 +02:00
|
|
|
entry:
|
|
|
|
%nt = alloca i8
|
|
|
|
; CHECK-NOT: call {{.*}}@_ZnwmRKSt9nothrow_t(
|
|
|
|
%call.i = tail call i8* @_ZnwmRKSt9nothrow_t(i64 1, i8* %nt) builtin nounwind
|
|
|
|
invoke void @_ZN1AC2Ev(i8* undef)
|
|
|
|
to label %.noexc.i unwind label %lpad.i
|
|
|
|
|
|
|
|
.noexc.i: ; preds = %entry
|
|
|
|
unreachable
|
|
|
|
|
|
|
|
lpad.i: ; preds = %entry
|
2015-06-17 22:52:32 +02:00
|
|
|
%0 = landingpad { i8*, i32 } cleanup
|
2013-07-22 01:11:42 +02:00
|
|
|
; CHECK-NOT: call {{.*}}@_ZdlPvRKSt9nothrow_t(
|
|
|
|
call void @_ZdlPvRKSt9nothrow_t(i8* %call.i, i8* %nt) builtin nounwind
|
|
|
|
resume { i8*, i32 } %0
|
|
|
|
}
|
2014-10-03 22:17:06 +02:00
|
|
|
|
|
|
|
declare i8* @_Znwm(i64) nobuiltin
|
|
|
|
declare i8* @_Znwj(i32) nobuiltin
|
|
|
|
declare i8* @_Znam(i64) nobuiltin
|
|
|
|
declare i8* @_Znaj(i32) nobuiltin
|
2015-01-15 02:00:33 +01:00
|
|
|
declare void @_ZdlPv(i8*) nobuiltin
|
|
|
|
declare void @_ZdaPv(i8*) nobuiltin
|
|
|
|
|
|
|
|
define linkonce void @_ZdlPvm(i8* %p, i64) nobuiltin {
|
|
|
|
call void @_ZdlPv(i8* %p)
|
|
|
|
ret void
|
|
|
|
}
|
|
|
|
define linkonce void @_ZdlPvj(i8* %p, i32) nobuiltin {
|
|
|
|
call void @_ZdlPv(i8* %p)
|
|
|
|
ret void
|
|
|
|
}
|
|
|
|
define linkonce void @_ZdaPvm(i8* %p, i64) nobuiltin {
|
|
|
|
call void @_ZdaPv(i8* %p)
|
|
|
|
ret void
|
|
|
|
}
|
|
|
|
define linkonce void @_ZdaPvj(i8* %p, i32) nobuiltin {
|
|
|
|
call void @_ZdaPv(i8* %p)
|
|
|
|
ret void
|
|
|
|
}
|
2014-10-03 22:17:06 +02:00
|
|
|
|
|
|
|
; CHECK-LABEL: @test8(
|
|
|
|
define void @test8() {
|
|
|
|
; CHECK-NOT: call
|
2015-01-15 02:00:33 +01:00
|
|
|
%nw = call i8* @_Znwm(i64 32) builtin
|
|
|
|
call void @_ZdlPv(i8* %nw) builtin
|
|
|
|
%na = call i8* @_Znam(i64 32) builtin
|
|
|
|
call void @_ZdaPv(i8* %na) builtin
|
2014-10-03 22:17:06 +02:00
|
|
|
%nwm = call i8* @_Znwm(i64 32) builtin
|
|
|
|
call void @_ZdlPvm(i8* %nwm, i64 32) builtin
|
|
|
|
%nwj = call i8* @_Znwj(i32 32) builtin
|
|
|
|
call void @_ZdlPvj(i8* %nwj, i32 32) builtin
|
|
|
|
%nam = call i8* @_Znam(i64 32) builtin
|
|
|
|
call void @_ZdaPvm(i8* %nam, i64 32) builtin
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%naj = call i8* @_Znaj(i32 32) builtin
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call void @_ZdaPvj(i8* %naj, i32 32) builtin
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ret void
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}
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