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llvm-mirror/test/Transforms/InstCombine/memset_chk-1.ll
Arthur Eubanks 8d9d580ae9 Revert "[BuildLibCalls/SimplifyLibCalls] Fix attributes on created CallInst instructions." 
This reverts commit 1eda5453f2dcc9a9a4b4578fe74163c529974503.

Causes https://crbug.com/1223647:
Incompatible argument and return types for 'returned' attribute
  tail call void @llvm.memset.p0i8.i64(i8* noalias noundef returned writeonly align 1 dereferenceable(255) %arraydecay, i8 0, i64 255, i1 false), !dbg !985
2021-06-24 19:24:34 -07:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Test lib call simplification of __memset_chk calls with various values
; for dstlen and len.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
; rdar://7719085
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"
%struct.T = type { [100 x i32], [100 x i32], [1024 x i8] }
@t = common global %struct.T zeroinitializer
; Check cases where dstlen >= len.
define i8* @test_simplify1() {
; CHECK-LABEL: @test_simplify1(
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T* @t to i8*), i8 0, i64 1824, i1 false)
; CHECK-NEXT: ret i8* bitcast (%struct.T* @t to i8*)
;
%dst = bitcast %struct.T* @t to i8*
%ret = call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 1824)
ret i8* %ret
}
define i8* @test_simplify2() {
; CHECK-LABEL: @test_simplify2(
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T* @t to i8*), i8 0, i64 1824, i1 false)
; CHECK-NEXT: ret i8* bitcast (%struct.T* @t to i8*)
;
%dst = bitcast %struct.T* @t to i8*
%ret = call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 3648)
ret i8* %ret
}
define i8* @test_simplify3() {
; CHECK-LABEL: @test_simplify3(
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T* @t to i8*), i8 0, i64 1824, i1 false)
; CHECK-NEXT: ret i8* bitcast (%struct.T* @t to i8*)
;
%dst = bitcast %struct.T* @t to i8*
%ret = call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 -1)
ret i8* %ret
}
; Check cases where dstlen < len.
define i8* @test_no_simplify1() {
; CHECK-LABEL: @test_no_simplify1(
; CHECK-NEXT: [[RET:%.*]] = call i8* @__memset_chk(i8* bitcast (%struct.T* @t to i8*), i32 0, i64 1824, i64 400)
; CHECK-NEXT: ret i8* [[RET]]
;
%dst = bitcast %struct.T* @t to i8*
%ret = call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 400)
ret i8* %ret
}
define i8* @test_no_simplify2() {
; CHECK-LABEL: @test_no_simplify2(
; CHECK-NEXT: [[RET:%.*]] = call i8* @__memset_chk(i8* bitcast (%struct.T* @t to i8*), i32 0, i64 1824, i64 0)
; CHECK-NEXT: ret i8* [[RET]]
;
%dst = bitcast %struct.T* @t to i8*
%ret = call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 0)
ret i8* %ret
}
; Test that RAUW in SimplifyLibCalls for __memset_chk generates valid IR
define i32 @test_rauw(i8* %a, i8* %b, i8** %c) {
; CHECK-LABEL: @test_rauw(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CALL49:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) [[A:%.*]])
; CHECK-NEXT: [[ADD180:%.*]] = add i64 [[CALL49]], 1
; CHECK-NEXT: [[YO107:%.*]] = call i64 @llvm.objectsize.i64.p0i8(i8* [[B:%.*]], i1 false, i1 false, i1 false)
; CHECK-NEXT: [[CALL50:%.*]] = call i8* @__memmove_chk(i8* [[B]], i8* [[A]], i64 [[ADD180]], i64 [[YO107]])
; CHECK-NEXT: [[STRLEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) [[B]])
; CHECK-NEXT: [[STRCHR1:%.*]] = getelementptr i8, i8* [[B]], i64 [[STRLEN]]
; CHECK-NEXT: [[D:%.*]] = load i8*, i8** [[C:%.*]], align 8
; CHECK-NEXT: [[SUB182:%.*]] = ptrtoint i8* [[D]] to i64
; CHECK-NEXT: [[SUB183:%.*]] = ptrtoint i8* [[B]] to i64
; CHECK-NEXT: [[SUB184:%.*]] = sub i64 [[SUB182]], [[SUB183]]
; CHECK-NEXT: [[ADD52_I_I:%.*]] = add nsw i64 [[SUB184]], 1
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 1 [[STRCHR1]], i8 0, i64 [[ADD52_I_I]], i1 false)
; CHECK-NEXT: ret i32 4
;
entry:
%call49 = call i64 @strlen(i8* %a)
%add180 = add i64 %call49, 1
%yo107 = call i64 @llvm.objectsize.i64.p0i8(i8* %b, i1 false, i1 false, i1 false)
%call50 = call i8* @__memmove_chk(i8* %b, i8* %a, i64 %add180, i64 %yo107)
%call51i = call i8* @strrchr(i8* %b, i32 0)
%d = load i8*, i8** %c, align 8
%sub182 = ptrtoint i8* %d to i64
%sub183 = ptrtoint i8* %b to i64
%sub184 = sub i64 %sub182, %sub183
%add52.i.i = add nsw i64 %sub184, 1
%call185 = call i8* @__memset_chk(i8* %call51i, i32 0, i64 %add52.i.i, i64 -1)
ret i32 4
}
declare i8* @__memmove_chk(i8*, i8*, i64, i64)
declare i8* @strrchr(i8*, i32)
declare i64 @strlen(i8* nocapture)
declare i64 @llvm.objectsize.i64.p0i8(i8*, i1, i1, i1)
declare i8* @__memset_chk(i8*, i32, i64, i64)
; FIXME: memset(malloc(x), 0, x) -> calloc(1, x)
define float* @pr25892(i64 %size) #0 {
; CHECK-LABEL: @pr25892(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @malloc(i64 [[SIZE:%.*]]) [[ATTR3:#.*]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8* [[CALL]], null
; CHECK-NEXT: br i1 [[CMP]], label [[CLEANUP:%.*]], label [[IF_END:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[BC:%.*]] = bitcast i8* [[CALL]] to float*
; CHECK-NEXT: [[CALL2:%.*]] = tail call i64 @llvm.objectsize.i64.p0i8(i8* nonnull [[CALL]], i1 false, i1 false, i1 false)
; CHECK-NEXT: [[CALL3:%.*]] = tail call i8* @__memset_chk(i8* nonnull [[CALL]], i32 0, i64 [[SIZE]], i64 [[CALL2]]) [[ATTR3]]
; CHECK-NEXT: br label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RETVAL_0:%.*]] = phi float* [ [[BC]], [[IF_END]] ], [ null, [[ENTRY:%.*]] ]
; CHECK-NEXT: ret float* [[RETVAL_0]]
;
entry:
%call = tail call i8* @malloc(i64 %size) #1
%cmp = icmp eq i8* %call, null
br i1 %cmp, label %cleanup, label %if.end
if.end:
%bc = bitcast i8* %call to float*
%call2 = tail call i64 @llvm.objectsize.i64.p0i8(i8* nonnull %call, i1 false, i1 false, i1 false)
%call3 = tail call i8* @__memset_chk(i8* nonnull %call, i32 0, i64 %size, i64 %call2) #1
br label %cleanup
cleanup:
%retval.0 = phi float* [ %bc, %if.end ], [ null, %entry ]
ret float* %retval.0
}
define i8* @test_no_incompatible_attr(i8* %mem, i32 %val, i32 %size) {
; CHECK-LABEL: @test_no_incompatible_attr(
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T* @t to i8*), i8 0, i64 1824, i1 false)
; CHECK-NEXT: ret i8* bitcast (%struct.T* @t to i8*)
;
%dst = bitcast %struct.T* @t to i8*
%ret = call dereferenceable(1) i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 1824)
ret i8* %ret
}
declare noalias i8* @malloc(i64) #1
attributes #0 = { nounwind ssp uwtable }
attributes #1 = { nounwind }
attributes #2 = { nounwind readnone }
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