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instcombine: Add more test cases for __memmove_chk simplification

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164798 91177308-0d34-0410-b5e6-96231b3b80d8
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Meador Inge
2012-09-27 21:21:25 +00:00
parent 012ffd251b
commit c8613c9089
2 changed files with 84 additions and 0 deletions
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60
test/Transforms/InstCombine/memmove_chk-1.ll Normal file
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; Test lib call simplification of __memmove_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 void @test_simplify1() {
; CHECK: @test_simplify1
%dst = bitcast %struct.T1* @t1 to i8*
%src = bitcast %struct.T2* @t2 to i8*
; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64
call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
ret void
}
define void @test_simplify2() {
; CHECK: @test_simplify2
%dst = bitcast %struct.T1* @t1 to i8*
%src = bitcast %struct.T3* @t3 to i8*
; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64
call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 2848)
ret void
}
; Check cases where dstlen < len.
define void @test_no_simplify1() {
; CHECK: @test_no_simplify1
%dst = bitcast %struct.T3* @t3 to i8*
%src = bitcast %struct.T1* @t1 to i8*
; CHECK-NEXT: call i8* @__memmove_chk
call i8* @__memmove_chk(i8* %dst, i8* %src, i64 2848, i64 1824)
ret void
}
define void @test_no_simplify2() {
; CHECK: @test_no_simplify2
%dst = bitcast %struct.T1* @t1 to i8*
%src = bitcast %struct.T2* @t2 to i8*
; CHECK-NEXT: call i8* @__memmove_chk
call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1024, i64 0)
ret void
}
declare i8* @__memmove_chk(i8*, i8*, i64, i64)

24
test/Transforms/InstCombine/memmove_chk-2.ll Normal file
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; Test that lib call simplification doesn't simplify __memmove_chk calls
; with the wrong prototype.
;
; 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] }
@t1 = common global %struct.T1 zeroinitializer
@t2 = common global %struct.T2 zeroinitializer
define void @test_no_simplify() {
; CHECK: @test_no_simplify
%dst = bitcast %struct.T1* @t1 to i8*
%src = bitcast %struct.T2* @t2 to i8*
; CHECK-NEXT: call i8* @__memmove_chk
call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824)
ret void
}
declare i8* @__memmove_chk(i8*, i8*, i64)