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llvm-project/llvm/test/CodeGen/X86/update-terminator.mir

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X86: Do not use llc -march in tests. `llc -march` is problematic because it only switches the target architecture, but leaves the operating system unchanged. This occasionally leads to indeterministic tests because the OS from LLVM_DEFAULT_TARGET_TRIPLE is used. However we can simply always use `llc -mtriple` instead. This changes all the tests to do this to avoid people using -march when they copy and paste parts of tests. See also the discussion in https://reviews.llvm.org/D35287 llvm-svn: 309774
2017-08-02 08:28:10 +08:00
# RUN: llc -mtriple=x86_64-- -verify-machineinstrs -run-pass block-placement -o - %s | FileCheck %s
[MBB] add a missing corner case in UpdateTerminator() After the block placement, if a block ends with a conditional branch, but the next block is not its successor. The conditional branch should be changed to unconditional branch. This patch fixes PR28307, PR28297, PR28402. Differential Revision: http://reviews.llvm.org/D21811 llvm-svn: 274470
2016-07-04 03:14:17 +08:00
# Check the conditional jump in bb.1 is changed to unconditional after block placement swaps bb.2 and bb.3.
--- |
@a = external global i16
@b = external global i32
Codegen: Tail-duplicate during placement. The tail duplication pass uses an assumed layout when making duplication decisions. This is fine, but passes up duplication opportunities that may arise when blocks are outlined. Because we want the updated CFG to affect subsequent placement decisions, this change must occur during placement. In order to achieve this goal, TailDuplicationPass is split into a utility class, TailDuplicator, and the pass itself. The pass delegates nearly everything to the TailDuplicator object, except for looping over the blocks in a function. This allows the same code to be used for tail duplication in both places. This change, in concert with outlining optional branches, allows triangle shaped code to perform much better, esepecially when the taken/untaken branches are correlated, as it creates a second spine when the tests are small enough. Issue from previous rollback fixed, and a new test was added for that case as well. Issue was worklist/scheduling/taildup issue in layout. Issue from 2nd rollback fixed, with 2 additional tests. Issue was tail merging/loop info/tail-duplication causing issue with loops that share a header block. Issue with early tail-duplication of blocks that branch to a fallthrough predecessor fixed with test case: tail-dup-branch-to-fallthrough.ll Differential revision: https://reviews.llvm.org/D18226 llvm-svn: 283934
2016-10-12 04:36:43 +08:00
declare void @dummy1()
declare void @dummy2()
declare void @dummy3()
[MBB] add a missing corner case in UpdateTerminator() After the block placement, if a block ends with a conditional branch, but the next block is not its successor. The conditional branch should be changed to unconditional branch. This patch fixes PR28307, PR28297, PR28402. Differential Revision: http://reviews.llvm.org/D21811 llvm-svn: 274470
2016-07-04 03:14:17 +08:00
; Function Attrs: nounwind
define void @f2() {
br i1 undef, label %bb1, label %bb3
bb1:
Codegen: Tail-duplicate during placement. The tail duplication pass uses an assumed layout when making duplication decisions. This is fine, but passes up duplication opportunities that may arise when blocks are outlined. Because we want the updated CFG to affect subsequent placement decisions, this change must occur during placement. In order to achieve this goal, TailDuplicationPass is split into a utility class, TailDuplicator, and the pass itself. The pass delegates nearly everything to the TailDuplicator object, except for looping over the blocks in a function. This allows the same code to be used for tail duplication in both places. This change, in concert with outlining optional branches, allows triangle shaped code to perform much better, esepecially when the taken/untaken branches are correlated, as it creates a second spine when the tests are small enough. Issue from previous rollback fixed, and a new test was added for that case as well. Issue was worklist/scheduling/taildup issue in layout. Issue from 2nd rollback fixed, with 2 additional tests. Issue was tail merging/loop info/tail-duplication causing issue with loops that share a header block. Issue with early tail-duplication of blocks that branch to a fallthrough predecessor fixed with test case: tail-dup-branch-to-fallthrough.ll Differential revision: https://reviews.llvm.org/D18226 llvm-svn: 283934
2016-10-12 04:36:43 +08:00
call void @dummy1()
call void @dummy1()
call void @dummy1()
[MBB] add a missing corner case in UpdateTerminator() After the block placement, if a block ends with a conditional branch, but the next block is not its successor. The conditional branch should be changed to unconditional branch. This patch fixes PR28307, PR28297, PR28402. Differential Revision: http://reviews.llvm.org/D21811 llvm-svn: 274470
2016-07-04 03:14:17 +08:00
br i1 undef, label %bb2, label %bb2
bb2:
Codegen: Tail-duplicate during placement. The tail duplication pass uses an assumed layout when making duplication decisions. This is fine, but passes up duplication opportunities that may arise when blocks are outlined. Because we want the updated CFG to affect subsequent placement decisions, this change must occur during placement. In order to achieve this goal, TailDuplicationPass is split into a utility class, TailDuplicator, and the pass itself. The pass delegates nearly everything to the TailDuplicator object, except for looping over the blocks in a function. This allows the same code to be used for tail duplication in both places. This change, in concert with outlining optional branches, allows triangle shaped code to perform much better, esepecially when the taken/untaken branches are correlated, as it creates a second spine when the tests are small enough. Issue from previous rollback fixed, and a new test was added for that case as well. Issue was worklist/scheduling/taildup issue in layout. Issue from 2nd rollback fixed, with 2 additional tests. Issue was tail merging/loop info/tail-duplication causing issue with loops that share a header block. Issue with early tail-duplication of blocks that branch to a fallthrough predecessor fixed with test case: tail-dup-branch-to-fallthrough.ll Differential revision: https://reviews.llvm.org/D18226 llvm-svn: 283934
2016-10-12 04:36:43 +08:00
call void @dummy2()
call void @dummy2()
call void @dummy2()
[MBB] add a missing corner case in UpdateTerminator() After the block placement, if a block ends with a conditional branch, but the next block is not its successor. The conditional branch should be changed to unconditional branch. This patch fixes PR28307, PR28297, PR28402. Differential Revision: http://reviews.llvm.org/D21811 llvm-svn: 274470
2016-07-04 03:14:17 +08:00
br label %bb4
bb3:
Codegen: Tail-duplicate during placement. The tail duplication pass uses an assumed layout when making duplication decisions. This is fine, but passes up duplication opportunities that may arise when blocks are outlined. Because we want the updated CFG to affect subsequent placement decisions, this change must occur during placement. In order to achieve this goal, TailDuplicationPass is split into a utility class, TailDuplicator, and the pass itself. The pass delegates nearly everything to the TailDuplicator object, except for looping over the blocks in a function. This allows the same code to be used for tail duplication in both places. This change, in concert with outlining optional branches, allows triangle shaped code to perform much better, esepecially when the taken/untaken branches are correlated, as it creates a second spine when the tests are small enough. Issue from previous rollback fixed, and a new test was added for that case as well. Issue was worklist/scheduling/taildup issue in layout. Issue from 2nd rollback fixed, with 2 additional tests. Issue was tail merging/loop info/tail-duplication causing issue with loops that share a header block. Issue with early tail-duplication of blocks that branch to a fallthrough predecessor fixed with test case: tail-dup-branch-to-fallthrough.ll Differential revision: https://reviews.llvm.org/D18226 llvm-svn: 283934
2016-10-12 04:36:43 +08:00
call void @dummy3()
call void @dummy3()
call void @dummy3()
[MBB] add a missing corner case in UpdateTerminator() After the block placement, if a block ends with a conditional branch, but the next block is not its successor. The conditional branch should be changed to unconditional branch. This patch fixes PR28307, PR28297, PR28402. Differential Revision: http://reviews.llvm.org/D21811 llvm-svn: 274470
2016-07-04 03:14:17 +08:00
br label %bb2
bb4:
ret void
}
...
---
# CHECK-LABEL: name: f2
# CHECK: bb.1:
# CHECK: JMP_1 %bb.2
# CHECK: bb.3:
# CHECK: bb.2:
name: f2
body: |
bb.0 (%ir-block.0):
successors: %bb.1(50), %bb.3(50)
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
JNE_1 %bb.1, implicit $eflags
[MBB] add a missing corner case in UpdateTerminator() After the block placement, if a block ends with a conditional branch, but the next block is not its successor. The conditional branch should be changed to unconditional branch. This patch fixes PR28307, PR28297, PR28402. Differential Revision: http://reviews.llvm.org/D21811 llvm-svn: 274470
2016-07-04 03:14:17 +08:00
JMP_1 %bb.3
bb.1:
successors: %bb.2(100)
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
CALL64pcrel32 @dummy1, csr_64, implicit $rsp, implicit-def $rsp
CALL64pcrel32 @dummy1, csr_64, implicit $rsp, implicit-def $rsp
CALL64pcrel32 @dummy1, csr_64, implicit $rsp, implicit-def $rsp
JNE_1 %bb.2, implicit $eflags
[MBB] add a missing corner case in UpdateTerminator() After the block placement, if a block ends with a conditional branch, but the next block is not its successor. The conditional branch should be changed to unconditional branch. This patch fixes PR28307, PR28297, PR28402. Differential Revision: http://reviews.llvm.org/D21811 llvm-svn: 274470
2016-07-04 03:14:17 +08:00
bb.2:
successors: %bb.4(100)
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
CALL64pcrel32 @dummy2, csr_64, implicit $rsp, implicit-def $rsp
CALL64pcrel32 @dummy2, csr_64, implicit $rsp, implicit-def $rsp
CALL64pcrel32 @dummy2, csr_64, implicit $rsp, implicit-def $rsp
[MBB] add a missing corner case in UpdateTerminator() After the block placement, if a block ends with a conditional branch, but the next block is not its successor. The conditional branch should be changed to unconditional branch. This patch fixes PR28307, PR28297, PR28402. Differential Revision: http://reviews.llvm.org/D21811 llvm-svn: 274470
2016-07-04 03:14:17 +08:00
JMP_1 %bb.4
bb.3:
successors: %bb.2(100)
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
CALL64pcrel32 @dummy3, csr_64, implicit $rsp, implicit-def $rsp
CALL64pcrel32 @dummy3, csr_64, implicit $rsp, implicit-def $rsp
CALL64pcrel32 @dummy3, csr_64, implicit $rsp, implicit-def $rsp
[MBB] add a missing corner case in UpdateTerminator() After the block placement, if a block ends with a conditional branch, but the next block is not its successor. The conditional branch should be changed to unconditional branch. This patch fixes PR28307, PR28297, PR28402. Differential Revision: http://reviews.llvm.org/D21811 llvm-svn: 274470
2016-07-04 03:14:17 +08:00
JMP_1 %bb.2
bb.4:
RETQ
...