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| author | Dan Gohman <dan433584@gmail.com> | 2017-11-30 22:10:53 +0000 |
|---|---|---|
| committer | Dan Gohman <dan433584@gmail.com> | 2017-11-30 22:10:53 +0000 |
| commit | 59e4c0b9381e9402d4987a5e5e5dec8424fbc4c6 (patch) | |
| tree | 43584c78a2af8282b29cf8d065c5a90a638b7350 /llvm/test/Transforms/MemCpyOpt/memcpy-invoke-memcpy.ll | |
| parent | 9d939c8f19854b94c99c37365d6c567deb4acc95 (diff) | |
| download | bcm5719-llvm-59e4c0b9381e9402d4987a5e5e5dec8424fbc4c6.tar.gz bcm5719-llvm-59e4c0b9381e9402d4987a5e5e5dec8424fbc4c6.zip | |
[memcpyopt] Teach memcpyopt to optimize across basic blocks
This teaches memcpyopt to make a non-local memdep query when a local query
indicates that the dependency is non-local. This notably allows it to
eliminate many more llvm.memcpy calls in common Rust code, often by 20-30%.
Fixes PR28958.
Differential Revision: https://reviews.llvm.org/D38374
llvm-svn: 319482
Diffstat (limited to 'llvm/test/Transforms/MemCpyOpt/memcpy-invoke-memcpy.ll')
| -rw-r--r-- | llvm/test/Transforms/MemCpyOpt/memcpy-invoke-memcpy.ll | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/llvm/test/Transforms/MemCpyOpt/memcpy-invoke-memcpy.ll b/llvm/test/Transforms/MemCpyOpt/memcpy-invoke-memcpy.ll new file mode 100644 index 00000000000..e3d1f6dd2b1 --- /dev/null +++ b/llvm/test/Transforms/MemCpyOpt/memcpy-invoke-memcpy.ll @@ -0,0 +1,48 @@ +; RUN: opt < %s -memcpyopt -S | FileCheck %s +; Test memcpy-memcpy dependencies across invoke edges. + +; Test that memcpyopt works across the non-unwind edge of an invoke. + +define hidden void @test_normal(i8* noalias %dst, i8* %src) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) { +entry: + %temp = alloca i8, i32 64 + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %temp, i8* nonnull %src, i64 64, i32 8, i1 false) +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %temp, i8* nonnull %src, i64 64, i32 8, i1 false) + invoke void @invoke_me() + to label %try.cont unwind label %lpad + +lpad: + landingpad { i8*, i32 } + catch i8* null + ret void + +try.cont: + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %temp, i64 64, i32 8, i1 false) +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %src, i64 64, i32 8, i1 false) + ret void +} + +; Test that memcpyopt works across the unwind edge of an invoke. + +define hidden void @test_unwind(i8* noalias %dst, i8* %src) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) { +entry: + %temp = alloca i8, i32 64 + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %temp, i8* nonnull %src, i64 64, i32 8, i1 false) +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %temp, i8* nonnull %src, i64 64, i32 8, i1 false) + invoke void @invoke_me() + to label %try.cont unwind label %lpad + +lpad: + landingpad { i8*, i32 } + catch i8* null + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %temp, i64 64, i32 8, i1 false) +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %src, i64 64, i32 8, i1 false) + ret void + +try.cont: + ret void +} + +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32, i1) +declare i32 @__gxx_personality_v0(...) +declare void @invoke_me() readnone |
