[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2019-04-17 12:52:47 +08:00
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64"
@C.0.1248 = internal constant [ 128 x float ] [ float -1.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float -1.000000e+00 , float 0.000000e+00 , float 1.000000e+00 , float 1.000000e+00 , float 1.000000e+00 ] , align 32 ; <[128 x float]*> [#uses=1]
define float @test1 ( i32 %hash , float %x , float %y , float %z , float %w ) {
; CHECK-LABEL: @test1(
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP3:%.*]] = shl i32 [[HASH:%.*]], 2
; CHECK-NEXT: [[TMP5:%.*]] = and i32 [[TMP3]], 124
; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[TMP5]] to i64
; CHECK-NEXT: [[TMP753:%.*]] = getelementptr [128 x float], [128 x float]* @C.0.1248, i64 0, i64 [[TMP0]]
; CHECK-NEXT: [[TMP9:%.*]] = load float, float* [[TMP753]], align 16
; CHECK-NEXT: [[TMP11:%.*]] = fmul float [[TMP9]], [[X:%.*]]
; CHECK-NEXT: [[TMP13:%.*]] = fadd float [[TMP11]], 0.000000e+00
; CHECK-NEXT: [[TMP17_SUM52:%.*]] = or i32 [[TMP5]], 1
; CHECK-NEXT: [[TMP1:%.*]] = zext i32 [[TMP17_SUM52]] to i64
; CHECK-NEXT: [[TMP1851:%.*]] = getelementptr [128 x float], [128 x float]* @C.0.1248, i64 0, i64 [[TMP1]]
; CHECK-NEXT: [[TMP19:%.*]] = load float, float* [[TMP1851]], align 4
; CHECK-NEXT: [[TMP21:%.*]] = fmul float [[TMP19]], [[Y:%.*]]
; CHECK-NEXT: [[TMP23:%.*]] = fadd float [[TMP21]], [[TMP13]]
; CHECK-NEXT: [[TMP27_SUM50:%.*]] = or i32 [[TMP5]], 2
; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[TMP27_SUM50]] to i64
; CHECK-NEXT: [[TMP2849:%.*]] = getelementptr [128 x float], [128 x float]* @C.0.1248, i64 0, i64 [[TMP2]]
; CHECK-NEXT: [[TMP29:%.*]] = load float, float* [[TMP2849]], align 8
; CHECK-NEXT: [[TMP31:%.*]] = fmul float [[TMP29]], [[Z:%.*]]
; CHECK-NEXT: [[TMP33:%.*]] = fadd float [[TMP31]], [[TMP23]]
; CHECK-NEXT: [[TMP37_SUM48:%.*]] = or i32 [[TMP5]], 3
; CHECK-NEXT: [[TMP3:%.*]] = zext i32 [[TMP37_SUM48]] to i64
; CHECK-NEXT: [[TMP3847:%.*]] = getelementptr [128 x float], [128 x float]* @C.0.1248, i64 0, i64 [[TMP3]]
; CHECK-NEXT: [[TMP39:%.*]] = load float, float* [[TMP3847]], align 4
; CHECK-NEXT: [[TMP41:%.*]] = fmul float [[TMP39]], [[W:%.*]]
; CHECK-NEXT: [[TMP43:%.*]] = fadd float [[TMP41]], [[TMP33]]
; CHECK-NEXT: ret float [[TMP43]]
;
entry:
%lookupTable = alloca [ 128 x float ] , align 16 ; <[128 x float]*> [#uses=5]
%lookupTable1 = bitcast [ 128 x float ] * %lookupTable to i8 * ; <i8*> [#uses=1]
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 16 %lookupTable1 , i8 * align 16 bitcast ( [ 128 x float ] * @C.0.1248 to i8 * ) , i64 512 , i1 false )
%tmp3 = shl i32 %hash , 2 ; <i32> [#uses=1]
%tmp5 = and i32 %tmp3 , 124 ; <i32> [#uses=4]
%tmp753 = getelementptr [ 128 x float ] , [ 128 x float ] * %lookupTable , i32 0 , i32 %tmp5 ; <float*> [#uses=1]
%tmp9 = load float , float * %tmp753 ; <float> [#uses=1]
%tmp11 = fmul float %tmp9 , %x ; <float> [#uses=1]
%tmp13 = fadd float %tmp11 , 0.000000e+00 ; <float> [#uses=1]
%tmp17.sum52 = or i32 %tmp5 , 1 ; <i32> [#uses=1]
%tmp1851 = getelementptr [ 128 x float ] , [ 128 x float ] * %lookupTable , i32 0 , i32 %tmp17.sum52 ; <float*> [#uses=1]
%tmp19 = load float , float * %tmp1851 ; <float> [#uses=1]
%tmp21 = fmul float %tmp19 , %y ; <float> [#uses=1]
%tmp23 = fadd float %tmp21 , %tmp13 ; <float> [#uses=1]
%tmp27.sum50 = or i32 %tmp5 , 2 ; <i32> [#uses=1]
%tmp2849 = getelementptr [ 128 x float ] , [ 128 x float ] * %lookupTable , i32 0 , i32 %tmp27.sum50 ; <float*> [#uses=1]
%tmp29 = load float , float * %tmp2849 ; <float> [#uses=1]
%tmp31 = fmul float %tmp29 , %z ; <float> [#uses=1]
%tmp33 = fadd float %tmp31 , %tmp23 ; <float> [#uses=1]
%tmp37.sum48 = or i32 %tmp5 , 3 ; <i32> [#uses=1]
%tmp3847 = getelementptr [ 128 x float ] , [ 128 x float ] * %lookupTable , i32 0 , i32 %tmp37.sum48 ; <float*> [#uses=1]
%tmp39 = load float , float * %tmp3847 ; <float> [#uses=1]
%tmp41 = fmul float %tmp39 , %w ; <float> [#uses=1]
%tmp43 = fadd float %tmp41 , %tmp33 ; <float> [#uses=1]
ret float %tmp43
2019-04-17 12:52:47 +08:00
}
declare void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * nocapture , i8 * nocapture , i64 , i1 ) nounwind
declare void @llvm.memcpy.p1i8.p0i8.i64 ( i8 addrspace ( 1 ) * nocapture , i8 * nocapture , i64 , i1 ) nounwind
declare void @llvm.memcpy.p0i8.p1i8.i64 ( i8 * nocapture , i8 addrspace ( 1 ) * nocapture , i64 , i1 ) nounwind
declare void @llvm.memcpy.p1i8.p1i8.i64 ( i8 addrspace ( 1 ) * nocapture , i8 addrspace ( 1 ) * nocapture , i64 , i1 ) nounwind
%T = type { i8 , [ 123 x i8 ] }
%U = type { i32 , i32 , i32 , i32 , i32 }
@G = constant %T { i8 1 , [ 123 x i8 ] zeroinitializer }
@H = constant [ 2 x %U ] zeroinitializer , align 16
define void @test2 ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[B1:%.*]] = alloca [124 x i8], align 8
; CHECK-NEXT: [[B1_SUB:%.*]] = getelementptr inbounds [124 x i8], [124 x i8]* [[B1]], i64 0, i64 0
[SimplifyLibCalls] Mark known arguments with nonnull
Reviewers: efriedma, jdoerfert
Reviewed By: jdoerfert
Subscribers: ychen, rsmith, joerg, aaron.ballman, lebedev.ri, uenoku, jdoerfert, hfinkel, javed.absar, spatel, dmgreen, llvm-commits
Differential Revision: https://reviews.llvm.org/D53342
llvm-svn: 372091
2019-09-17 17:32:52 +08:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 8 dereferenceable(124) [[B1_SUB]], i8* nonnull align 16 dereferenceable(124) getelementptr inbounds (%T, %T* @G, i64 0, i32 0), i64 124, i1 false)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: call void @bar(i8* nonnull [[B1_SUB]])
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %T
%B = alloca %T
%a = bitcast %T * %A to i8 *
%b = bitcast %T * %B to i8 *
; %A alloca is deleted
; use @G instead of %A
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %a , i8 * align 4 bitcast ( %T * @G to i8 * ) , i64 124 , i1 false )
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %b , i8 * align 4 %a , i64 124 , i1 false )
call void @bar ( i8 * %b )
ret void
}
define void @test2_no_null_opt ( ) #0 {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test2_no_null_opt(
; CHECK-NEXT: [[B1:%.*]] = alloca [124 x i8], align 8
; CHECK-NEXT: [[B1_SUB:%.*]] = getelementptr inbounds [124 x i8], [124 x i8]* [[B1]], i64 0, i64 0
2019-08-15 00:50:06 +08:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 dereferenceable(124) [[B1_SUB]], i8* align 16 dereferenceable(124) getelementptr inbounds (%T, %T* @G, i64 0, i32 0), i64 124, i1 false)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: call void @bar(i8* [[B1_SUB]])
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %T
%B = alloca %T
%a = bitcast %T * %A to i8 *
%b = bitcast %T * %B to i8 *
; %A alloca is deleted
; use @G instead of %A
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %a , i8 * align 4 bitcast ( %T * @G to i8 * ) , i64 124 , i1 false )
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %b , i8 * align 4 %a , i64 124 , i1 false )
call void @bar ( i8 * %b )
ret void
}
define void @test2_addrspacecast ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test2_addrspacecast(
; CHECK-NEXT: [[B1:%.*]] = alloca [124 x i8], align 8
; CHECK-NEXT: [[B1_SUB:%.*]] = getelementptr inbounds [124 x i8], [124 x i8]* [[B1]], i64 0, i64 0
; CHECK-NEXT: [[B:%.*]] = addrspacecast i8* [[B1_SUB]] to i8 addrspace(1)*
2019-08-15 00:50:06 +08:00
; CHECK-NEXT: call void @llvm.memcpy.p1i8.p1i8.i64(i8 addrspace(1)* align 4 dereferenceable(124) [[B]], i8 addrspace(1)* align 4 dereferenceable(124) addrspacecast (i8* getelementptr inbounds (%T, %T* @G, i64 0, i32 0) to i8 addrspace(1)*), i64 124, i1 false)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: call void @bar_as1(i8 addrspace(1)* [[B]])
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %T
%B = alloca %T
%a = addrspacecast %T * %A to i8 addrspace ( 1 ) *
%b = addrspacecast %T * %B to i8 addrspace ( 1 ) *
; %A alloca is deleted
; This doesn't exactly match what test2 does, because folding the type
; cast into the alloca doesn't work for the addrspacecast yet.
; use @G instead of %A
call void @llvm.memcpy.p1i8.p0i8.i64 ( i8 addrspace ( 1 ) * align 4 %a , i8 * align 4 bitcast ( %T * @G to i8 * ) , i64 124 , i1 false )
call void @llvm.memcpy.p1i8.p1i8.i64 ( i8 addrspace ( 1 ) * align 4 %b , i8 addrspace ( 1 ) * align 4 %a , i64 124 , i1 false )
call void @bar_as1 ( i8 addrspace ( 1 ) * %b )
ret void
}
declare void @bar ( i8 * )
declare void @bar_as1 ( i8 addrspace ( 1 ) * )
;; Should be able to eliminate the alloca.
define void @test3 ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test3(
; CHECK-NEXT: call void @bar(i8* getelementptr inbounds (%T, %T* @G, i64 0, i32 0)) #2
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %T
%a = bitcast %T * %A to i8 *
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %a , i8 * align 4 bitcast ( %T * @G to i8 * ) , i64 124 , i1 false )
call void @bar ( i8 * %a ) readonly
ret void
}
define void @test3_addrspacecast ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test3_addrspacecast(
; CHECK-NEXT: call void @bar(i8* getelementptr inbounds (%T, %T* @G, i64 0, i32 0)) #2
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %T
%a = bitcast %T * %A to i8 *
call void @llvm.memcpy.p0i8.p1i8.i64 ( i8 * align 4 %a , i8 addrspace ( 1 ) * align 4 addrspacecast ( %T * @G to i8 addrspace ( 1 ) * ) , i64 124 , i1 false )
call void @bar ( i8 * %a ) readonly
ret void
}
define void @test4 ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test4(
; CHECK-NEXT: call void @baz(i8* byval getelementptr inbounds (%T, %T* @G, i64 0, i32 0))
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %T
%a = bitcast %T * %A to i8 *
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %a , i8 * align 4 bitcast ( %T * @G to i8 * ) , i64 124 , i1 false )
call void @baz ( i8 * byval %a )
ret void
}
declare void @llvm.lifetime.start.p0i8 ( i64 , i8 * )
define void @test5 ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test5(
; CHECK-NEXT: call void @baz(i8* byval getelementptr inbounds (%T, %T* @G, i64 0, i32 0))
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %T
%a = bitcast %T * %A to i8 *
call void @llvm.lifetime.start.p0i8 ( i64 -1 , i8 * %a )
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %a , i8 * align 4 bitcast ( %T * @G to i8 * ) , i64 124 , i1 false )
call void @baz ( i8 * byval %a )
ret void
}
declare void @baz ( i8 * byval )
define void @test6 ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test6(
; CHECK-NEXT: call void @bar(i8* bitcast ([2 x %U]* @H to i8*)) #2
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %U , align 16
%a = bitcast %U * %A to i8 *
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 16 %a , i8 * align 16 bitcast ( [ 2 x %U ] * @H to i8 * ) , i64 20 , i1 false )
call void @bar ( i8 * %a ) readonly
ret void
}
define void @test7 ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test7(
; CHECK-NEXT: call void @bar(i8* bitcast ([2 x %U]* @H to i8*)) #2
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %U , align 16
%a = bitcast %U * %A to i8 *
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %a , i8 * align 4 bitcast ( %U * getelementptr ( [ 2 x %U ] , [ 2 x %U ] * @H , i64 0 , i32 0 ) to i8 * ) , i64 20 , i1 false )
call void @bar ( i8 * %a ) readonly
ret void
}
define void @test8 ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test8(
; CHECK-NEXT: [[AL:%.*]] = alloca [[U:%.*]], align 16
; CHECK-NEXT: [[A:%.*]] = bitcast %U* [[AL]] to i8*
[SimplifyLibCalls] Mark known arguments with nonnull
Reviewers: efriedma, jdoerfert
Reviewed By: jdoerfert
Subscribers: ychen, rsmith, joerg, aaron.ballman, lebedev.ri, uenoku, jdoerfert, hfinkel, javed.absar, spatel, dmgreen, llvm-commits
Differential Revision: https://reviews.llvm.org/D53342
llvm-svn: 372091
2019-09-17 17:32:52 +08:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 16 dereferenceable(20) [[A]], i8* nonnull align 4 dereferenceable(20) bitcast (%U* getelementptr inbounds ([2 x %U], [2 x %U]* @H, i64 0, i64 1) to i8*), i64 20, i1 false)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: call void @bar(i8* nonnull [[A]]) #2
; CHECK-NEXT: ret void
;
%al = alloca %U , align 16
%a = bitcast %U * %al to i8 *
2019-04-17 12:52:47 +08:00
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %a , i8 * align 4 bitcast ( %U * getelementptr ( [ 2 x %U ] , [ 2 x %U ] * @H , i64 0 , i32 1 ) to i8 * ) , i64 20 , i1 false )
call void @bar ( i8 * %a ) readonly
ret void
}
define void @test8_addrspacecast ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test8_addrspacecast(
; CHECK-NEXT: [[AL:%.*]] = alloca [[U:%.*]], align 16
; CHECK-NEXT: [[A:%.*]] = bitcast %U* [[AL]] to i8*
2019-08-15 00:50:06 +08:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p1i8.i64(i8* nonnull align 16 dereferenceable(20) [[A]], i8 addrspace(1)* align 4 dereferenceable(20) addrspacecast (i8* bitcast (%U* getelementptr inbounds ([2 x %U], [2 x %U]* @H, i64 0, i64 1) to i8*) to i8 addrspace(1)*), i64 20, i1 false)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: call void @bar(i8* nonnull [[A]]) #2
; CHECK-NEXT: ret void
;
%Al = alloca %U , align 16
%a = bitcast %U * %Al to i8 *
2019-04-17 12:52:47 +08:00
call void @llvm.memcpy.p0i8.p1i8.i64 ( i8 * align 4 %a , i8 addrspace ( 1 ) * align 4 addrspacecast ( %U * getelementptr ( [ 2 x %U ] , [ 2 x %U ] * @H , i64 0 , i32 1 ) to i8 addrspace ( 1 ) * ) , i64 20 , i1 false )
call void @bar ( i8 * %a ) readonly
ret void
}
define void @test9 ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test9(
; CHECK-NEXT: call void @bar(i8* bitcast (%U* getelementptr inbounds ([2 x %U], [2 x %U]* @H, i64 0, i64 1) to i8*)) #2
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %U , align 4
%a = bitcast %U * %A to i8 *
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 4 %a , i8 * align 4 bitcast ( %U * getelementptr ( [ 2 x %U ] , [ 2 x %U ] * @H , i64 0 , i32 1 ) to i8 * ) , i64 20 , i1 false )
call void @bar ( i8 * %a ) readonly
ret void
}
define void @test9_addrspacecast ( ) {
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-LABEL: @test9_addrspacecast(
; CHECK-NEXT: call void @bar(i8* bitcast (%U* getelementptr inbounds ([2 x %U], [2 x %U]* @H, i64 0, i64 1) to i8*)) #2
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
%A = alloca %U , align 4
%a = bitcast %U * %A to i8 *
call void @llvm.memcpy.p0i8.p1i8.i64 ( i8 * align 4 %a , i8 addrspace ( 1 ) * align 4 addrspacecast ( %U * getelementptr ( [ 2 x %U ] , [ 2 x %U ] * @H , i64 0 , i32 1 ) to i8 addrspace ( 1 ) * ) , i64 20 , i1 false )
call void @bar ( i8 * %a ) readonly
ret void
}
@bbb = local_unnamed_addr global [ 1000000 x i8 ] zeroinitializer , align 16
@_ZL3KKK = internal unnamed_addr constant [ 3 x i8 ] c "\01\01\02" , align 1
; Should not replace alloca with global because of size mismatch.
define void @test9_small_global ( ) {
; CHECK-LABEL: @test9_small_global(
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CC:%.*]] = alloca [1000000 x i8], align 16
; CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [1000000 x i8], [1000000 x i8]* [[CC]], i64 0, i64 0
[SimplifyLibCalls] Mark known arguments with nonnull
Reviewers: efriedma, jdoerfert
Reviewed By: jdoerfert
Subscribers: ychen, rsmith, joerg, aaron.ballman, lebedev.ri, uenoku, jdoerfert, hfinkel, javed.absar, spatel, dmgreen, llvm-commits
Differential Revision: https://reviews.llvm.org/D53342
llvm-svn: 372091
2019-09-17 17:32:52 +08:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 16 dereferenceable(3) [[ARRAYDECAY]], i8* nonnull align 16 dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @_ZL3KKK, i64 0, i64 0), i64 3, i1 false)
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 16 dereferenceable(1000000) getelementptr inbounds ([1000000 x i8], [1000000 x i8]* @bbb, i64 0, i64 0), i8* nonnull align 16 dereferenceable(1000000) [[ARRAYDECAY]], i64 1000000, i1 false)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
entry:
%cc = alloca [ 1000000 x i8 ] , align 16
%cc.0..sroa_idx = getelementptr inbounds [ 1000000 x i8 ] , [ 1000000 x i8 ] * %cc , i64 0 , i64 0
%arraydecay = getelementptr inbounds [ 1000000 x i8 ] , [ 1000000 x i8 ] * %cc , i32 0 , i32 0
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * %arraydecay , i8 * getelementptr inbounds ( [ 3 x i8 ] , [ 3 x i8 ] * @_ZL3KKK , i32 0 , i32 0 ) , i64 3 , i1 false )
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * align 16 getelementptr inbounds ( [ 1000000 x i8 ] , [ 1000000 x i8 ] * @bbb , i32 0 , i32 0 ) , i8 * align 16 %arraydecay , i64 1000000 , i1 false )
ret void
}
; Should replace alloca with global as they have exactly the same size.
define void @test10_same_global ( ) {
; CHECK-LABEL: @test10_same_global(
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: entry:
[SimplifyLibCalls] Mark known arguments with nonnull
Reviewers: efriedma, jdoerfert
Reviewed By: jdoerfert
Subscribers: ychen, rsmith, joerg, aaron.ballman, lebedev.ri, uenoku, jdoerfert, hfinkel, javed.absar, spatel, dmgreen, llvm-commits
Differential Revision: https://reviews.llvm.org/D53342
llvm-svn: 372091
2019-09-17 17:32:52 +08:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 16 dereferenceable(3) getelementptr inbounds ([1000000 x i8], [1000000 x i8]* @bbb, i64 0, i64 0), i8* nonnull align 16 dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @_ZL3KKK, i64 0, i64 0), i64 3, i1 false)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites
Summary:
int mm(char *a, char *b) {
return memcmp(a,b,16);
}
Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
ret i32 %call
}
After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
%call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16)
ret i32 %call
}
Reviewers: jdoerfert, efriedma
Reviewed By: jdoerfert
Subscribers: javed.absar, spatel, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66079
llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: ret void
;
2019-04-17 12:52:47 +08:00
entry:
%cc = alloca [ 3 x i8 ] , align 1
%cc.0..sroa_idx = getelementptr inbounds [ 3 x i8 ] , [ 3 x i8 ] * %cc , i64 0 , i64 0
%arraydecay = getelementptr inbounds [ 3 x i8 ] , [ 3 x i8 ] * %cc , i32 0 , i32 0
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * %arraydecay , i8 * getelementptr inbounds ( [ 3 x i8 ] , [ 3 x i8 ] * @_ZL3KKK , i32 0 , i32 0 ) , i64 3 , i1 false )
call void @llvm.memcpy.p0i8.p0i8.i64 ( i8 * getelementptr inbounds ( [ 1000000 x i8 ] , [ 1000000 x i8 ] * @bbb , i32 0 , i32 0 ) , i8 * %arraydecay , i64 3 , i1 false )
ret void
}
attributes #0 = { "null-pointer-is-valid" = "true" }