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; Test lib call simplification of __memcpy_chk calls with various values
; for dstlen and len.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
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.T1 = type { [100 x i32], [100 x i32], [1024 x i8] }
%struct.T2 = type { [100 x i32], [100 x i32], [1024 x i8] }
%struct.T3 = type { [100 x i32], [100 x i32], [2048 x i8] }
@t1 = common global %struct.T1 zeroinitializer
@t2 = common global %struct.T2 zeroinitializer
@t3 = common global %struct.T3 zeroinitializer
; Check cases where dstlen >= len.
define i8* @test_simplify1() {
; CHECK-LABEL: @test_simplify1(
%dst = bitcast %struct.T1* @t1 to i8*
%src = bitcast %struct.T2* @t2 to i8*
; 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)
; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
ret i8* %ret
}
define i8* @test_simplify2() {
; CHECK-LABEL: @test_simplify2(
%dst = bitcast %struct.T1* @t1 to i8*
%src = bitcast %struct.T3* @t3 to i8*
; 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)
; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 2848)
ret i8* %ret
}
; Check cases where dstlen < len.
define i8* @test_no_simplify1() {
; CHECK-LABEL: @test_no_simplify1(
%dst = bitcast %struct.T3* @t3 to i8*
%src = bitcast %struct.T1* @t1 to i8*
; 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)
; CHECK-NEXT: ret i8* %ret
%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 2848, i64 1824)
ret i8* %ret
}
define i8* @test_no_simplify2() {
; CHECK-LABEL: @test_no_simplify2(
%dst = bitcast %struct.T1* @t1 to i8*
%src = bitcast %struct.T2* @t2 to i8*
; 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)
; CHECK-NEXT: ret i8* %ret
%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1024, i64 0)
ret i8* %ret
}
define i8* @test_simplify_return_indcall(i8* ()* %alloc) {
; CHECK-LABEL: @test_simplify_return_indcall(
%src = bitcast %struct.T2* @t2 to i8*
; CHECK-NEXT: %dst = call i8* %alloc()
%dst = call i8* %alloc()
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64
%ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
; CHECK-NEXT: ret i8* %dst
ret i8* %ret
}
declare i8* @__memcpy_chk(i8*, i8*, i64, i64)
|
