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llvm-6502/test/Transforms/DeadStoreElimination/lifetime.ll

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Make BasicAliasAnalysis a normal AliasAnalysis implementation which does normal initialization and normal chaining. Change the default AliasAnalysis implementation to NoAlias. Update StandardCompileOpts.h and friends to explicitly request BasicAliasAnalysis. Update tests to explicitly request -basicaa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116720 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-18 18:04:47 +00:00
; RUN: opt -S -basicaa -dse < %s | FileCheck %s
Reapply r86359, "Teach dead store elimination that certain intrinsics write to memory just like a store" with bug fixed (partial-overwrite.ll is the regression test). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86667 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 06:46:40 +00:00
Teach memdep to look for memory use intrinsics during dependency queries. Fixes PR5574. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90045 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28 21:27:49 +00:00
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
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133337 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-18 06:05:24 +00:00
declare void @llvm.memset.p0i8.i8(i8* nocapture, i8, i8, i32, i1) nounwind
Reapply r86359, "Teach dead store elimination that certain intrinsics write to memory just like a store" with bug fixed (partial-overwrite.ll is the regression test). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86667 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 06:46:40 +00:00
define void @test1() {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186268 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-14 01:42:54 +00:00
; CHECK-LABEL: @test1(
Reapply r86359, "Teach dead store elimination that certain intrinsics write to memory just like a store" with bug fixed (partial-overwrite.ll is the regression test). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86667 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 06:46:40 +00:00
%A = alloca i8
store i8 0, i8* %A ;; Written to by memset
call void @llvm.lifetime.end(i64 1, i8* %A)
; CHECK: lifetime.end
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133337 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-18 06:05:24 +00:00
call void @llvm.memset.p0i8.i8(i8* %A, i8 0, i8 -1, i32 0, i1 false)
Reapply r86359, "Teach dead store elimination that certain intrinsics write to memory just like a store" with bug fixed (partial-overwrite.ll is the regression test). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86667 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 06:46:40 +00:00
; CHECK-NOT: memset
ret void
; CHECK: ret void
}
Teach memdep to look for memory use intrinsics during dependency queries. Fixes PR5574. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90045 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28 21:27:49 +00:00
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
}
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