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78 lines
2.8 KiB
78 lines
2.8 KiB
4 months ago
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; Test lib call simplification of __memcpy_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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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.T1 = type { [100 x i32], [100 x i32], [1024 x i8] }
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%struct.T2 = type { [100 x i32], [100 x i32], [1024 x i8] }
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%struct.T3 = type { [100 x i32], [100 x i32], [2048 x i8] }
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@t1 = common global %struct.T1 zeroinitializer
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@t2 = common global %struct.T2 zeroinitializer
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@t3 = common global %struct.T3 zeroinitializer
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; Check cases where dstlen >= len.
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define i8* @test_simplify1() {
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; CHECK-LABEL: @test_simplify1(
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%dst = bitcast %struct.T1* @t1 to i8*
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%src = bitcast %struct.T2* @t2 to i8*
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast (%struct.T1* @t1 to i8*), i8* bitcast (%struct.T2* @t2 to i8*), i64 1824, i32 4, i1 false)
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; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
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%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
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ret i8* %ret
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}
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define i8* @test_simplify2() {
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; CHECK-LABEL: @test_simplify2(
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%dst = bitcast %struct.T1* @t1 to i8*
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%src = bitcast %struct.T3* @t3 to i8*
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast (%struct.T1* @t1 to i8*), i8* bitcast (%struct.T3* @t3 to i8*), i64 1824, i32 4, i1 false)
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; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
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%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 2848)
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ret i8* %ret
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}
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; Check cases where dstlen < len.
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define i8* @test_no_simplify1() {
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; CHECK-LABEL: @test_no_simplify1(
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%dst = bitcast %struct.T3* @t3 to i8*
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%src = bitcast %struct.T1* @t1 to i8*
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; CHECK-NEXT: %ret = call i8* @__memcpy_chk(i8* bitcast (%struct.T3* @t3 to i8*), i8* bitcast (%struct.T1* @t1 to i8*), i64 2848, i64 1824)
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; CHECK-NEXT: ret i8* %ret
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%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 2848, i64 1824)
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ret i8* %ret
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}
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define i8* @test_no_simplify2() {
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; CHECK-LABEL: @test_no_simplify2(
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%dst = bitcast %struct.T1* @t1 to i8*
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%src = bitcast %struct.T2* @t2 to i8*
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; CHECK-NEXT: %ret = call i8* @__memcpy_chk(i8* bitcast (%struct.T1* @t1 to i8*), i8* bitcast (%struct.T2* @t2 to i8*), i64 1024, i64 0)
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; CHECK-NEXT: ret i8* %ret
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%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1024, i64 0)
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ret i8* %ret
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}
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define i8* @test_simplify_return_indcall(i8* ()* %alloc) {
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; CHECK-LABEL: @test_simplify_return_indcall(
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%src = bitcast %struct.T2* @t2 to i8*
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; CHECK-NEXT: %dst = call i8* %alloc()
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%dst = call i8* %alloc()
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64
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%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
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; CHECK-NEXT: ret i8* %dst
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ret i8* %ret
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}
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declare i8* @__memcpy_chk(i8*, i8*, i64, i64)
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