6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-11-01 15:17:25 +00:00
Code Issues Projects Releases Wiki Activity

Teach memdep to look for memory use intrinsics during dependency queries. Fixes

Browse Source 
PR5574.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90045 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2009-11-28 21:27:49 +00:00
parent 0c264b16b0
commit d801c10de6
2 changed files with 49 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
test/Transforms/DeadStoreElimination/lifetime.ll
View File

@@ -1,6 +1,9 @@
; RUN: opt -S -dse < %s | FileCheck %s
declare void @llvm.lifetime.end(i64, i8*)
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind
declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind
declare void @llvm.memset.i8(i8*, i8, i8, i32)
define void @test1() {
@@ -17,3 +20,18 @@ define void @test1() {
ret void
; CHECK: ret void
}
define void @test2(i32* %P) {
; CHECK: test2
%Q = getelementptr i32* %P, i32 1
%R = bitcast i32* %Q to i8*
call void @llvm.lifetime.start(i64 4, i8* %R)
; CHECK: lifetime.start
store i32 0, i32* %Q ;; This store is dead.
; CHECK-NOT: store
call void @llvm.lifetime.end(i64 4, i8* %R)
; CHECK: lifetime.end
ret void
}