mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-22 07:32:48 +00:00
e6d781fd3c
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
47 lines
1.4 KiB
LLVM
47 lines
1.4 KiB
LLVM
; Test that the stpcpy library call simplifier works correctly.
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
;
|
|
; This transformation requires the pointer size, as it assumes that size_t is
|
|
; the size of a pointer.
|
|
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-n8:16:32"
|
|
|
|
@hello = constant [6 x i8] c"hello\00"
|
|
@a = common global [32 x i8] zeroinitializer, align 1
|
|
@b = common global [32 x i8] zeroinitializer, align 1
|
|
|
|
declare i8* @stpcpy(i8*, i8*)
|
|
|
|
define i8* @test_simplify1() {
|
|
; CHECK: @test_simplify1
|
|
|
|
%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
|
|
%src = getelementptr [6 x i8]* @hello, i32 0, i32 0
|
|
|
|
%ret = call i8* @stpcpy(i8* %dst, i8* %src)
|
|
; CHECK: @llvm.memcpy.p0i8.p0i8.i32
|
|
; CHECK-NEXT: getelementptr inbounds ([32 x i8]* @a, i32 0, i32 5)
|
|
ret i8* %ret
|
|
}
|
|
|
|
define i8* @test_simplify2() {
|
|
; CHECK: @test_simplify2
|
|
|
|
%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
|
|
|
|
%ret = call i8* @stpcpy(i8* %dst, i8* %dst)
|
|
; CHECK: [[LEN:%[a-z]+]] = call i32 @strlen
|
|
; CHECK-NEXT: getelementptr inbounds [32 x i8]* @a, i32 0, i32 [[LEN]]
|
|
ret i8* %ret
|
|
}
|
|
|
|
define i8* @test_no_simplify1() {
|
|
; CHECK: @test_no_simplify1
|
|
|
|
%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
|
|
%src = getelementptr [32 x i8]* @b, i32 0, i32 0
|
|
|
|
%ret = call i8* @stpcpy(i8* %dst, i8* %src)
|
|
; CHECK: call i8* @stpcpy
|
|
ret i8* %ret
|
|
}
|