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llvm-6502/test/Transforms/InstCombine/stpcpy_chk-1.ll

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instcombine: Split out the __stpcpy_chk simplifications from StrCpyChkOpt r166198 migrated the strcpy optimization to instcombine. The strcpy simplifier that was migrated from Transforms/Scalar/SimplifyLibCalls.cpp was also doing some __strcpy_chk simplifications. Those fortified simplifications were migrated as well, but introduced a bug in the __stpcpy_chk simplifier in the process. This happened because the __strcpy_chk and __stpcpy_chk simplifiers were both mapped to StrCpyChkOpt which was updated with simplifications that worked for __strcpy_chk, but not __stpcpy_chk. This patch fixes the problem by adding proper test coverage and creating a new simplifier for __stpcpy_chk (instead of sharing one with __strcpy_chk). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167082 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-31 00:20:51 +00:00
; Test lib call simplification of __stpcpy_chk calls with various values
; for src, dst, and slen.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
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"
@a = common global [60 x i8] zeroinitializer, align 1
@b = common global [60 x i8] zeroinitializer, align 1
@.str = private constant [12 x i8] c"abcdefghijk\00"
; Check cases where slen >= strlen (src).
define void @test_simplify1() {
; CHECK: @test_simplify1
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
instcombine: Migrate stpcpy optimizations This patch migrates the stpcpy optimizations from the simplify-libcalls pass into the instcombine library call simplifier. Note that the __stpcpy_chk simplifications were migrated in a previous commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167083 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-31 00:20:56 +00:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32
instcombine: Split out the __stpcpy_chk simplifications from StrCpyChkOpt r166198 migrated the strcpy optimization to instcombine. The strcpy simplifier that was migrated from Transforms/Scalar/SimplifyLibCalls.cpp was also doing some __strcpy_chk simplifications. Those fortified simplifications were migrated as well, but introduced a bug in the __stpcpy_chk simplifier in the process. This happened because the __strcpy_chk and __stpcpy_chk simplifiers were both mapped to StrCpyChkOpt which was updated with simplifications that worked for __strcpy_chk, but not __stpcpy_chk. This patch fixes the problem by adding proper test coverage and creating a new simplifier for __stpcpy_chk (instead of sharing one with __strcpy_chk). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167082 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-31 00:20:51 +00:00
call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 60)
ret void
}
define void @test_simplify2() {
; CHECK: @test_simplify2
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
instcombine: Migrate stpcpy optimizations This patch migrates the stpcpy optimizations from the simplify-libcalls pass into the instcombine library call simplifier. Note that the __stpcpy_chk simplifications were migrated in a previous commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167083 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-31 00:20:56 +00:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32
instcombine: Split out the __stpcpy_chk simplifications from StrCpyChkOpt r166198 migrated the strcpy optimization to instcombine. The strcpy simplifier that was migrated from Transforms/Scalar/SimplifyLibCalls.cpp was also doing some __strcpy_chk simplifications. Those fortified simplifications were migrated as well, but introduced a bug in the __stpcpy_chk simplifier in the process. This happened because the __strcpy_chk and __stpcpy_chk simplifiers were both mapped to StrCpyChkOpt which was updated with simplifications that worked for __strcpy_chk, but not __stpcpy_chk. This patch fixes the problem by adding proper test coverage and creating a new simplifier for __stpcpy_chk (instead of sharing one with __strcpy_chk). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167082 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-31 00:20:51 +00:00
call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 12)
ret void
}
define void @test_simplify3() {
; CHECK: @test_simplify3
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
instcombine: Migrate stpcpy optimizations This patch migrates the stpcpy optimizations from the simplify-libcalls pass into the instcombine library call simplifier. Note that the __stpcpy_chk simplifications were migrated in a previous commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167083 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-31 00:20:56 +00:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32
instcombine: Split out the __stpcpy_chk simplifications from StrCpyChkOpt r166198 migrated the strcpy optimization to instcombine. The strcpy simplifier that was migrated from Transforms/Scalar/SimplifyLibCalls.cpp was also doing some __strcpy_chk simplifications. Those fortified simplifications were migrated as well, but introduced a bug in the __stpcpy_chk simplifier in the process. This happened because the __strcpy_chk and __stpcpy_chk simplifiers were both mapped to StrCpyChkOpt which was updated with simplifications that worked for __strcpy_chk, but not __stpcpy_chk. This patch fixes the problem by adding proper test coverage and creating a new simplifier for __stpcpy_chk (instead of sharing one with __strcpy_chk). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167082 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-31 00:20:51 +00:00
call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 -1)
ret void
}
; Check cases where there are no string constants.
define void @test_simplify4() {
; CHECK: @test_simplify4
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0
; CHECK-NEXT: call i8* @stpcpy
call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 -1)
ret void
}
; Check case where the string length is not constant.
define i8* @test_simplify5() {
; CHECK: @test_simplify5
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
; CHECK: @__memcpy_chk
%len = call i32 @llvm.objectsize.i32(i8* %dst, i1 false)
%ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 %len)
; CHECK: ret i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 11)
ret i8* %ret
}
; Check case where the source and destination are the same.
define i8* @test_simplify6() {
; CHECK: @test_simplify6
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
; CHECK: [[LEN:%[a-z]+]] = call i32 @strlen
; CHECK-NEXT: getelementptr inbounds [60 x i8]* @a, i32 0, i32 [[LEN]]
%len = call i32 @llvm.objectsize.i32(i8* %dst, i1 false)
%ret = call i8* @__stpcpy_chk(i8* %dst, i8* %dst, i32 %len)
ret i8* %ret
}
; Check case where slen < strlen (src).
define void @test_no_simplify1() {
; CHECK: @test_no_simplify1
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0
; CHECK-NEXT: call i8* @__stpcpy_chk
call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 8)
ret void
}
declare i8* @__stpcpy_chk(i8*, i8*, i32) nounwind
declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly
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