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https://github.com/RPCSX/llvm.git
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d57120551f
Before this patch we had @a = weak global ... but @b = alias weak ... The patch changes aliases to look more like global variables. Looking at some really old code suggests that the reason was that the old bison based parser had a reduction for alias linkages and another one for global variable linkages. Putting the alias first avoided the reduce/reduce conflict. The days of the old .ll parser are long gone. The new one parses just "linkage" and a later check is responsible for deciding if a linkage is valid in a given context. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214355 91177308-0d34-0410-b5e6-96231b3b80d8
279 lines
8.5 KiB
LLVM
279 lines
8.5 KiB
LLVM
; Test a pile of objectsize bounds checking.
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; We need target data to get the sizes of the arrays and structures.
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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@a = private global [60 x i8] zeroinitializer, align 1 ; <[60 x i8]*>
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@.str = private constant [8 x i8] c"abcdefg\00" ; <[8 x i8]*>
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define i32 @foo() nounwind {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: ret i32 60
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%1 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false)
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ret i32 %1
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}
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define i8* @bar() nounwind {
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; CHECK-LABEL: @bar(
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entry:
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%retval = alloca i8*
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%0 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false)
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%cmp = icmp ne i32 %0, -1
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; CHECK: br i1 true
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br i1 %cmp, label %cond.true, label %cond.false
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cond.true:
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%1 = load i8** %retval
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ret i8* %1
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cond.false:
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%2 = load i8** %retval
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ret i8* %2
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}
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define i32 @f() nounwind {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: ret i32 0
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%1 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr ([60 x i8]* @a, i32 1, i32 0), i1 false)
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ret i32 %1
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}
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@window = external global [0 x i8]
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define i1 @baz() nounwind {
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; CHECK-LABEL: @baz(
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; CHECK-NEXT: objectsize
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%1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([0 x i8]* @window, i32 0, i32 0), i1 false)
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%2 = icmp eq i32 %1, -1
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ret i1 %2
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}
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define void @test1(i8* %q, i32 %x) nounwind noinline {
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; CHECK-LABEL: @test1(
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; CHECK: objectsize.i32.p0i8
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entry:
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%0 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([0 x i8]* @window, i32 0, i32 10), i1 false) ; <i64> [#uses=1]
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%1 = icmp eq i32 %0, -1 ; <i1> [#uses=1]
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br i1 %1, label %"47", label %"46"
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"46": ; preds = %entry
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unreachable
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"47": ; preds = %entry
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unreachable
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}
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@.str5 = private constant [9 x i32] [i32 97, i32 98, i32 99, i32 100, i32 0, i32
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101, i32 102, i32 103, i32 0], align 4
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define i32 @test2() nounwind {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: ret i32 34
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%1 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr (i8* bitcast ([9 x i32]* @.str5 to i8*), i32 2), i1 false)
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ret i32 %1
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}
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; rdar://7674946
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@array = internal global [480 x float] zeroinitializer ; <[480 x float]*> [#uses=1]
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declare i8* @__memcpy_chk(i8*, i8*, i32, i32) nounwind
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declare i32 @llvm.objectsize.i32.p0i8(i8*, i1) nounwind readonly
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declare i8* @__inline_memcpy_chk(i8*, i8*, i32) nounwind inlinehint
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define void @test3() nounwind {
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; CHECK-LABEL: @test3(
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entry:
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br i1 undef, label %bb11, label %bb12
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bb11:
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%0 = getelementptr inbounds float* getelementptr inbounds ([480 x float]* @array, i32 0, i32 128), i32 -127 ; <float*> [#uses=1]
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%1 = bitcast float* %0 to i8* ; <i8*> [#uses=1]
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%2 = call i32 @llvm.objectsize.i32.p0i8(i8* %1, i1 false) ; <i32> [#uses=1]
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%3 = call i8* @__memcpy_chk(i8* undef, i8* undef, i32 512, i32 %2) nounwind ; <i8*> [#uses=0]
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; CHECK: unreachable
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unreachable
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bb12:
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%4 = getelementptr inbounds float* getelementptr inbounds ([480 x float]* @array, i32 0, i32 128), i32 -127 ; <float*> [#uses=1]
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%5 = bitcast float* %4 to i8* ; <i8*> [#uses=1]
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%6 = call i8* @__inline_memcpy_chk(i8* %5, i8* undef, i32 512) nounwind inlinehint ; <i8*> [#uses=0]
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; CHECK: @__inline_memcpy_chk
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unreachable
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}
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; rdar://7718857
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%struct.data = type { [100 x i32], [100 x i32], [1024 x i8] }
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define i32 @test4(i8** %esc) nounwind ssp {
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; CHECK-LABEL: @test4(
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entry:
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%0 = alloca %struct.data, align 8
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%1 = bitcast %struct.data* %0 to i8*
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%2 = call i32 @llvm.objectsize.i32.p0i8(i8* %1, i1 false) nounwind
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; CHECK-NOT: @llvm.objectsize
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; CHECK: @llvm.memset.p0i8.i32(i8* %1, i8 0, i32 1824, i32 8, i1 false)
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%3 = call i8* @__memset_chk(i8* %1, i32 0, i32 1824, i32 %2) nounwind
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store i8* %1, i8** %esc
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ret i32 0
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}
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; rdar://7782496
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@s = external global i8*
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define i8* @test5(i32 %n) nounwind ssp {
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; CHECK-LABEL: @test5(
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entry:
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%0 = tail call noalias i8* @malloc(i32 20) nounwind
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%1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %0, i1 false)
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%2 = load i8** @s, align 8
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; CHECK-NOT: @llvm.objectsize
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; CHECK: @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* %1, i32 10, i32 1, i1 false)
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%3 = tail call i8* @__memcpy_chk(i8* %0, i8* %2, i32 10, i32 %1) nounwind
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ret i8* %0
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}
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define void @test6(i32 %n) nounwind ssp {
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; CHECK-LABEL: @test6(
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entry:
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%0 = tail call noalias i8* @malloc(i32 20) nounwind
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%1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %0, i1 false)
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%2 = load i8** @s, align 8
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; CHECK-NOT: @llvm.objectsize
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; CHECK: @__memcpy_chk(i8* %0, i8* %1, i32 30, i32 20)
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%3 = tail call i8* @__memcpy_chk(i8* %0, i8* %2, i32 30, i32 %1) nounwind
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ret void
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}
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declare i8* @__memset_chk(i8*, i32, i32, i32) nounwind
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declare noalias i8* @malloc(i32) nounwind
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define i32 @test7(i8** %esc) {
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; CHECK-LABEL: @test7(
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%alloc = call noalias i8* @malloc(i32 48) nounwind
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store i8* %alloc, i8** %esc
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%gep = getelementptr inbounds i8* %alloc, i32 16
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%objsize = call i32 @llvm.objectsize.i32.p0i8(i8* %gep, i1 false) nounwind readonly
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; CHECK: ret i32 32
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ret i32 %objsize
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}
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declare noalias i8* @calloc(i32, i32) nounwind
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define i32 @test8(i8** %esc) {
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; CHECK-LABEL: @test8(
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%alloc = call noalias i8* @calloc(i32 5, i32 7) nounwind
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store i8* %alloc, i8** %esc
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%gep = getelementptr inbounds i8* %alloc, i32 5
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%objsize = call i32 @llvm.objectsize.i32.p0i8(i8* %gep, i1 false) nounwind readonly
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; CHECK: ret i32 30
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ret i32 %objsize
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}
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declare noalias i8* @strdup(i8* nocapture) nounwind
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declare noalias i8* @strndup(i8* nocapture, i32) nounwind
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; CHECK-LABEL: @test9(
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define i32 @test9(i8** %esc) {
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%call = tail call i8* @strdup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0)) nounwind
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store i8* %call, i8** %esc, align 8
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%1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true)
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; CHECK: ret i32 8
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ret i32 %1
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}
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; CHECK-LABEL: @test10(
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define i32 @test10(i8** %esc) {
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%call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 3) nounwind
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store i8* %call, i8** %esc, align 8
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%1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true)
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; CHECK: ret i32 4
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ret i32 %1
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}
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; CHECK-LABEL: @test11(
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define i32 @test11(i8** %esc) {
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%call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 7) nounwind
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store i8* %call, i8** %esc, align 8
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%1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true)
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; CHECK: ret i32 8
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ret i32 %1
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}
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; CHECK-LABEL: @test12(
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define i32 @test12(i8** %esc) {
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%call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 8) nounwind
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store i8* %call, i8** %esc, align 8
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%1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true)
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; CHECK: ret i32 8
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ret i32 %1
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}
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; CHECK-LABEL: @test13(
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define i32 @test13(i8** %esc) {
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%call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 57) nounwind
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store i8* %call, i8** %esc, align 8
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%1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true)
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; CHECK: ret i32 8
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ret i32 %1
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}
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; CHECK-LABEL: @PR13390(
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define i32 @PR13390(i1 %bool, i8* %a) {
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entry:
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%cond = or i1 %bool, true
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br i1 %cond, label %return, label %xpto
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xpto:
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%select = select i1 %bool, i8* %select, i8* %a
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%select2 = select i1 %bool, i8* %a, i8* %select2
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%0 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %select, i1 true)
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%1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %select2, i1 true)
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%2 = add i32 %0, %1
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; CHECK: ret i32 undef
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ret i32 %2
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return:
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ret i32 42
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}
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; CHECK-LABEL: @PR13621(
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define i32 @PR13621(i1 %bool) nounwind {
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entry:
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%cond = or i1 %bool, true
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br i1 %cond, label %return, label %xpto
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; technically reachable, but this malformed IR may appear as a result of constant propagation
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xpto:
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%gep2 = getelementptr i8* %gep, i32 1
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%gep = getelementptr i8* %gep2, i32 1
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%o = call i32 @llvm.objectsize.i32.p0i8(i8* %gep, i1 true)
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; CHECK: ret i32 undef
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ret i32 %o
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return:
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ret i32 7
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}
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@globalalias = internal alias [60 x i8]* @a
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; CHECK-LABEL: @test18(
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; CHECK-NEXT: ret i32 60
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define i32 @test18() {
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%bc = bitcast [60 x i8]* @globalalias to i8*
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%1 = call i32 @llvm.objectsize.i32.p0i8(i8* %bc, i1 false)
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ret i32 %1
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}
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@globalalias2 = weak alias [60 x i8]* @a
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; CHECK-LABEL: @test19(
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; CHECK: llvm.objectsize
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define i32 @test19() {
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%bc = bitcast [60 x i8]* @globalalias2 to i8*
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%1 = call i32 @llvm.objectsize.i32.p0i8(i8* %bc, i1 false)
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ret i32 %1
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}
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