forked from OSchip/llvm-project
62 lines
1.6 KiB
LLVM
62 lines
1.6 KiB
LLVM
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; Test lib call simplification of __memset_chk calls with various values
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; for dstlen and len.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; rdar://7719085
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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"
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%struct.T = type { [100 x i32], [100 x i32], [1024 x i8] }
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@t = common global %struct.T zeroinitializer
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; Check cases where dstlen >= len.
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define void @test_simplify1() {
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; CHECK: @test_simplify1
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%dst = bitcast %struct.T* @t to i8*
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; CHECK-NEXT: call void @llvm.memset.p0i8.i64
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call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 1824)
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ret void
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}
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define void @test_simplify2() {
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; CHECK: @test_simplify2
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%dst = bitcast %struct.T* @t to i8*
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; CHECK-NEXT: call void @llvm.memset.p0i8.i64
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call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 3648)
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ret void
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}
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define void @test_simplify3() {
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; CHECK: @test_simplify3
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%dst = bitcast %struct.T* @t to i8*
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; CHECK-NEXT: call void @llvm.memset.p0i8.i64
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call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 -1)
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ret void
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}
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; Check cases where dstlen < len.
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define void @test_no_simplify1() {
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; CHECK: @test_no_simplify1
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%dst = bitcast %struct.T* @t to i8*
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; CHECK-NEXT: call i8* @__memset_chk
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call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 400)
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ret void
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}
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define void @test_no_simplify2() {
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; CHECK: @test_no_simplify2
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%dst = bitcast %struct.T* @t to i8*
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; CHECK-NEXT: call i8* @__memset_chk
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call i8* @__memset_chk(i8* %dst, i32 0, i64 1824, i64 0)
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ret void
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}
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declare i8* @__memset_chk(i8*, i32, i64, i64)
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