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| author | Daniel Berlin <dberlin@dberlin.org> | 2016-08-03 00:01:46 +0000 |
|---|---|---|
| committer | Daniel Berlin <dberlin@dberlin.org> | 2016-08-03 00:01:46 +0000 |
| commit | df10119e4eb85ad38b4d18e20b0799060c18f2fb (patch) | |
| tree | 2ee73aa4547a1abbe74deb49d0746c51c1afd97d /llvm/test/Transforms/Util/MemorySSA/lifetime-simple.ll | |
| parent | c3ded37ccf6f8a515b0885cb970f62bfc73eb6f2 (diff) | |
| download | bcm5719-llvm-df10119e4eb85ad38b4d18e20b0799060c18f2fb.tar.gz bcm5719-llvm-df10119e4eb85ad38b4d18e20b0799060c18f2fb.zip | |
Support for lifetime begin/end markers in the MemorySSA use optimizer
Summary: Depends on D23072
Reviewers: george.burgess.iv
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D23076
llvm-svn: 277553
Diffstat (limited to 'llvm/test/Transforms/Util/MemorySSA/lifetime-simple.ll')
| -rw-r--r-- | llvm/test/Transforms/Util/MemorySSA/lifetime-simple.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/llvm/test/Transforms/Util/MemorySSA/lifetime-simple.ll b/llvm/test/Transforms/Util/MemorySSA/lifetime-simple.ll new file mode 100644 index 00000000000..cdb36e31eb9 --- /dev/null +++ b/llvm/test/Transforms/Util/MemorySSA/lifetime-simple.ll @@ -0,0 +1,30 @@ +; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s +; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s +; This test checks a number of things: +; First, the lifetime markers should not clobber any uses of Q or P. +; Second, the loads of P are MemoryUse(LiveOnEntry) due to the placement of the markers vs the loads. + +define i8 @test(i8* %P, i8* %Q) { +entry: +; CHECK: 1 = MemoryDef(liveOnEntry) +; CHECK-NEXT: call void @llvm.lifetime.start(i64 32, i8* %P) + call void @llvm.lifetime.start(i64 32, i8* %P) +; CHECK: MemoryUse(liveOnEntry) +; CHECK-NEXT: %0 = load i8, i8* %P + %0 = load i8, i8* %P +; CHECK: 2 = MemoryDef(1) +; CHECK-NEXT: store i8 1, i8* %P + store i8 1, i8* %P +; CHECK: 3 = MemoryDef(2) +; CHECK-NEXT: call void @llvm.lifetime.end(i64 32, i8* %P) + call void @llvm.lifetime.end(i64 32, i8* %P) +; CHECK: MemoryUse(liveOnEntry) +; CHECK-NEXT: %1 = load i8, i8* %P + %1 = load i8, i8* %P +; CHECK: MemoryUse(2) +; CHECK-NEXT: %2 = load i8, i8* %Q + %2 = load i8, i8* %Q + ret i8 %1 +} +declare void @llvm.lifetime.start(i64 %S, i8* nocapture %P) readonly +declare void @llvm.lifetime.end(i64 %S, i8* nocapture %P) |
