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| author | Geoff Berry <gberry@codeaurora.org> | 2018-02-01 18:54:01 +0000 |
|---|---|---|
| committer | Geoff Berry <gberry@codeaurora.org> | 2018-02-01 18:54:01 +0000 |
| commit | 94503c7bc3d70f51ab03c03b2067db3e973efa19 (patch) | |
| tree | 8db2d28d7793aa60b2cde1e630798f3e3c3fd6e7 /llvm/test/CodeGen/AArch64/flags-multiuse.ll | |
| parent | a95bd9f72414a7d26f21a4ee5a0f40ff1d0c951a (diff) | |
| download | bcm5719-llvm-94503c7bc3d70f51ab03c03b2067db3e973efa19.tar.gz bcm5719-llvm-94503c7bc3d70f51ab03c03b2067db3e973efa19.zip | |
[MachineCopyPropagation] Extend pass to do COPY source forwarding
Summary:
This change extends MachineCopyPropagation to do COPY source forwarding
and adds an additional run of the pass to the default pass pipeline just
after register allocation.
This version of this patch uses the newly added
MachineOperand::isRenamable bit to avoid forwarding registers is such a
way as to violate constraints that aren't captured in the
Machine IR (e.g. ABI or ISA constraints).
This change is a continuation of the work started in D30751.
Reviewers: qcolombet, javed.absar, MatzeB, jonpa, tstellar
Subscribers: tpr, mgorny, mcrosier, nhaehnle, nemanjai, jyknight, hfinkel, arsenm, inouehrs, eraman, sdardis, guyblank, fedor.sergeev, aheejin, dschuff, jfb, myatsina, llvm-commits
Differential Revision: https://reviews.llvm.org/D41835
llvm-svn: 323991
Diffstat (limited to 'llvm/test/CodeGen/AArch64/flags-multiuse.ll')
| -rw-r--r-- | llvm/test/CodeGen/AArch64/flags-multiuse.ll | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/test/CodeGen/AArch64/flags-multiuse.ll b/llvm/test/CodeGen/AArch64/flags-multiuse.ll index 0827fb8c9e8..a13f7e1e34a 100644 --- a/llvm/test/CodeGen/AArch64/flags-multiuse.ll +++ b/llvm/test/CodeGen/AArch64/flags-multiuse.ll @@ -17,6 +17,9 @@ define i32 @test_multiflag(i32 %n, i32 %m, i32 %o) { %val = zext i1 %test to i32 ; CHECK: cset {{[xw][0-9]+}}, ne +; CHECK: mov [[RHSCOPY:w[0-9]+]], [[RHS]] +; CHECK: mov [[LHSCOPY:w[0-9]+]], [[LHS]] + store i32 %val, i32* @var call void @bar() @@ -25,7 +28,7 @@ define i32 @test_multiflag(i32 %n, i32 %m, i32 %o) { ; Currently, the comparison is emitted again. An MSR/MRS pair would also be ; acceptable, but assuming the call preserves NZCV is not. br i1 %test, label %iftrue, label %iffalse -; CHECK: cmp [[LHS]], [[RHS]] +; CHECK: cmp [[LHSCOPY]], [[RHSCOPY]] ; CHECK: b.eq iftrue: |
