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https://github.com/c64scene-ar/llvm-6502.git
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75f0d6953a
Log: Transform @llvm.objectsize to integer if the argument is a result of malloc of known size. Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp llvm/trunk/test/Transforms/InstCombine/objsize.ll It appears to be causing swb and nightly test failures. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97866 91177308-0d34-0410-b5e6-96231b3b80d8
126 lines
4.0 KiB
LLVM
126 lines
4.0 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: @foo
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; CHECK-NEXT: ret i32 60
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%1 = call i32 @llvm.objectsize.i32(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: @bar
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entry:
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%retval = alloca i8*
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%0 = call i32 @llvm.objectsize.i32(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: @f
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; CHECK-NEXT: ret i32 0
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%1 = call i32 @llvm.objectsize.i32(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: @baz
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; CHECK-NEXT: ret i1 true
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%1 = tail call i32 @llvm.objectsize.i32(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: @test1
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; CHECK: objectsize.i32
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entry:
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%0 = call i32 @llvm.objectsize.i32(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: @test2
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; CHECK-NEXT: ret i32 34
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%1 = call i32 @llvm.objectsize.i32(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(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: @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(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: @__memcpy_chk
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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() nounwind ssp {
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; CHECK: @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 i64 @llvm.objectsize.i64(i8* %1, i1 false) nounwind
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; CHECK-NOT: @llvm.objectsize
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; CHECK: @__memset_chk(i8* %1, i32 0, i64 1824, i64 1824)
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%3 = call i8* @__memset_chk(i8* %1, i32 0, i64 1824, i64 %2) nounwind
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ret i32 0
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}
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declare i8* @__memset_chk(i8*, i32, i64, i64) nounwind
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declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly
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declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readonly
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