forked from OSchip/llvm-project
65 lines
2.6 KiB
LLVM
65 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; 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-LABEL: @test_simplify1(
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* nonnull align 1 dereferenceable(6) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false)
|
|
; CHECK-NEXT: ret i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 5)
|
|
;
|
|
|
|
%dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
|
|
%src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
|
|
|
|
%ret = call i8* @stpcpy(i8* %dst, i8* %src)
|
|
ret i8* %ret
|
|
}
|
|
|
|
define i8* @test_simplify2() {
|
|
; CHECK-LABEL: @test_simplify2(
|
|
; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(i8* nonnull dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0))
|
|
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [32 x i8], [32 x i8]* @a, i32 0, i32 [[STRLEN]]
|
|
; CHECK-NEXT: ret i8* [[TMP1]]
|
|
;
|
|
|
|
%dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
|
|
|
|
%ret = call i8* @stpcpy(i8* %dst, i8* %dst)
|
|
ret i8* %ret
|
|
}
|
|
|
|
define void @test_simplify3(i8* %dst) {
|
|
; CHECK-LABEL: @test_simplify3(
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* nonnull align 1 dereferenceable(80) [[DST:%.*]], i8* nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false)
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
|
|
%src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
|
|
|
|
call i8* @stpcpy(i8* dereferenceable(80) %dst, i8* %src)
|
|
ret void
|
|
}
|
|
|
|
define i8* @test_no_simplify1() {
|
|
; CHECK-LABEL: @test_no_simplify1(
|
|
; CHECK-NEXT: [[RET:%.*]] = call i8* @stpcpy(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([32 x i8], [32 x i8]* @b, i32 0, i32 0))
|
|
; CHECK-NEXT: ret i8* [[RET]]
|
|
;
|
|
|
|
%dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
|
|
%src = getelementptr [32 x i8], [32 x i8]* @b, i32 0, i32 0
|
|
|
|
%ret = call i8* @stpcpy(i8* %dst, i8* %src)
|
|
ret i8* %ret
|
|
}
|