diff options
| author | Chris Lattner <sabre@nondot.org> | 2010-11-30 19:12:10 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-11-30 19:12:10 +0000 |
| commit | 55ee75d57114c17460d364121a2ec3a5cf40e1d2 (patch) | |
| tree | 6600ba9840712413875e33b42cff9468a47bc257 /test/Transforms/DeadStoreElimination | |
| parent | 12822af16ae2218e5cdfdf4976e66d81417edda6 (diff) | |
| download | llvm-55ee75d57114c17460d364121a2ec3a5cf40e1d2.tar.gz llvm-55ee75d57114c17460d364121a2ec3a5cf40e1d2.tar.bz2 llvm-55ee75d57114c17460d364121a2ec3a5cf40e1d2.tar.xz | |
enhance isRemovable to refuse to delete volatile mem transfers
now that DSE hacks on them. This fixes a regression I introduced,
by generalizing DSE to hack on transfers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120445 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/DeadStoreElimination')
| -rw-r--r-- | test/Transforms/DeadStoreElimination/simple.ll | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/test/Transforms/DeadStoreElimination/simple.ll b/test/Transforms/DeadStoreElimination/simple.ll index 0c05b15357..203cf37193 100644 --- a/test/Transforms/DeadStoreElimination/simple.ll +++ b/test/Transforms/DeadStoreElimination/simple.ll @@ -1,6 +1,12 @@ ; RUN: opt < %s -basicaa -dse -S | FileCheck %s 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.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind +declare void @llvm.memset.i64(i8*, i8, i64, i32) +declare void @llvm.memcpy.i64(i8*, i8*, i64, i32) +declare i8* @llvm.init.trampoline(i8*, i8*, i8*) + define void @test1(i32* %Q, i32* %P) { %DEAD = load i32* %Q store i32 %DEAD, i32* %P @@ -55,9 +61,6 @@ define void @test5(i32* %Q) { ; CHECK-NEXT: ret void } -declare void @llvm.memset.i64(i8*, i8, i64, i32) -declare void @llvm.memcpy.i64(i8*, i8*, i64, i32) - ; Should delete store of 10 even though memset is a may-store to P (P and Q may ; alias). define void @test6(i32 *%p, i8 *%q) { @@ -116,7 +119,6 @@ define double @test10(i8* %X) { ; DSE should delete the dead trampoline. -declare i8* @llvm.init.trampoline(i8*, i8*, i8*) declare void @test11f() define void @test11() { ; CHECK: @test11 @@ -210,3 +212,13 @@ define void @test17(i8* %P, i8* %Q) nounwind ssp { ; CHECK-NEXT: ret } +; Should not delete the volatile memset. +define void @test17v(i8* %P, i8* %Q) nounwind ssp { + tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i32 1, i1 true) + tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %Q, i64 12, i32 1, i1 false) + ret void +; CHECK: @test17v +; CHECK-NEXT: call void @llvm.memset +; CHECK-NEXT: call void @llvm.memcpy +; CHECK-NEXT: ret +} |