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llvm-project/llvm/test/CodeGen/SystemZ/cmpxchg-02.ll

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[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
; Test 16-bit compare and swap.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-MAIN
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT
; Check compare and swap with a variable.
; - CHECK is for the main loop.
; - CHECK-SHIFT makes sure that the negated shift count used by the second
; RLL is set up correctly. The negation is independent of the NILL and L
; tested in CHECK. CHECK-SHIFT also checks that %r3 is not modified before
; being used in the RISBG (in contrast to things like atomic addition,
; which shift %r3 left so that %b is at the high end of the word).
define i16 @f1(i16 %dummy, i16 *%src, i16 %cmp, i16 %swap) {
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP done sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-MAIN-LABEL: f1:
DAGCombiner: Reduce truncated shl width llvm-svn: 268094
2016-04-30 03:53:16 +08:00
; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r3, 0, 189, 0{{$}}
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 21:59:28 +08:00
; CHECK-MAIN-DAG: sll %r3, 3
; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
DAGCombiner: Reduce truncated shl width llvm-svn: 268094
2016-04-30 03:53:16 +08:00
; CHECK-MAIN: rll %r2, [[OLD]], 16(%r3)
[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
; CHECK-MAIN: risbg %r4, %r2, 32, 47, 0
[SystemZ] Register compare-and-branch support This patch adds support for the CRJ and CGRJ instructions. Support for the immediate forms will be a separate patch. The architecture has a large number of comparison instructions. I think it's generally better to concentrate on using the "best" comparison instruction first and foremost, then only use something like CRJ if CR really was the natual choice of comparison instruction. The patch therefore opportunistically converts separate CR and BRC instructions into a single CRJ while emitting instructions in ISelLowering. llvm-svn: 182764
2013-05-28 18:41:11 +08:00
; CHECK-MAIN: crjlh %r2, %r4, [[EXIT:\.[^ ]*]]
[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
; CHECK-MAIN: risbg %r5, %r2, 32, 47, 0
; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r5, -16({{%r[1-9]+}})
DAGCombiner: Reduce truncated shl width llvm-svn: 268094
2016-04-30 03:53:16 +08:00
; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
[SystemZ] Be more careful about inverting CC masks System z branches have a mask to select which of the 4 CC values should cause the branch to be taken. We can invert a branch by inverting the mask. However, not all instructions can produce all 4 CC values, so inverting the branch like this can lead to some oddities. For example, integer comparisons only produce a CC of 0 (equal), 1 (less) or 2 (greater). If an integer EQ is reversed to NE before instruction selection, the branch will test for 1 or 2. If instead the branch is reversed after instruction selection (by inverting the mask), it will test for 1, 2 or 3. Both are correct, but the second isn't really canonical. This patch therefore keeps track of which CC values are possible and uses this when inverting a mask. Although this is mostly cosmestic, it fixes undefined behavior for the CIJNLH in branch-08.ll. Another fix would have been to mask out bit 0 when generating the fused compare and branch, but the point of this patch is that we shouldn't need to do that in the first place. The patch also makes it easier to reuse CC results from other instructions. llvm-svn: 187495
2013-07-31 20:30:20 +08:00
; CHECK-MAIN: jl [[LOOP]]
[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
; CHECK-MAIN: [[EXIT]]:
; CHECK-MAIN-NOT: %r2
; CHECK-MAIN: br %r14
;
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP done sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-SHIFT-LABEL: f1:
DAGCombiner: Reduce truncated shl width llvm-svn: 268094
2016-04-30 03:53:16 +08:00
; CHECK-SHIFT: sll %r3, 3
; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r3
[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
; CHECK-SHIFT: rll
; CHECK-SHIFT: rll {{%r[0-9]+}}, %r5, -16([[NEGSHIFT]])
IR: add "cmpxchg weak" variant to support permitted failure. This commit adds a weak variant of the cmpxchg operation, as described in C++11. A cmpxchg instruction with this modifier is permitted to fail to store, even if the comparison indicated it should. As a result, cmpxchg instructions must return a flag indicating success in addition to their original iN value loaded. Thus, for uniformity *all* cmpxchg instructions now return "{ iN, i1 }". The second flag is 1 when the store succeeded. At the DAG level, a new ATOMIC_CMP_SWAP_WITH_SUCCESS node has been added as the natural representation for the new cmpxchg instructions. It is a strong cmpxchg. By default this gets Expanded to the existing ATOMIC_CMP_SWAP during Legalization, so existing backends should see no change in behaviour. If they wish to deal with the enhanced node instead, they can call setOperationAction on it. Beware: as a node with 2 results, it cannot be selected from TableGen. Currently, no use is made of the extra information provided in this patch. Test updates are almost entirely adapting the input IR to the new scheme. Summary for out of tree users: ------------------------------ + Legacy Bitcode files are upgraded during read. + Legacy assembly IR files will be invalid. + Front-ends must adapt to different type for "cmpxchg". + Backends should be unaffected by default. llvm-svn: 210903
2014-06-13 22:24:07 +08:00
%pair = cmpxchg i16 *%src, i16 %cmp, i16 %swap seq_cst seq_cst
%res = extractvalue { i16, i1 } %pair, 0
[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
ret i16 %res
}
; Check compare and swap with constants. We should force the constants into
; registers and use the sequence above.
define i16 @f2(i16 *%src) {
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP done sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: f2:
[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
; CHECK: lhi [[CMP:%r[0-9]+]], 42
; CHECK: risbg [[CMP]], {{%r[0-9]+}}, 32, 47, 0
; CHECK: risbg
; CHECK: br %r14
;
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP done sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-SHIFT-LABEL: f2:
[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
; CHECK-SHIFT: lhi [[SWAP:%r[0-9]+]], 88
; CHECK-SHIFT: risbg
; CHECK-SHIFT: risbg [[SWAP]], {{%r[0-9]+}}, 32, 47, 0
; CHECK-SHIFT: br %r14
IR: add "cmpxchg weak" variant to support permitted failure. This commit adds a weak variant of the cmpxchg operation, as described in C++11. A cmpxchg instruction with this modifier is permitted to fail to store, even if the comparison indicated it should. As a result, cmpxchg instructions must return a flag indicating success in addition to their original iN value loaded. Thus, for uniformity *all* cmpxchg instructions now return "{ iN, i1 }". The second flag is 1 when the store succeeded. At the DAG level, a new ATOMIC_CMP_SWAP_WITH_SUCCESS node has been added as the natural representation for the new cmpxchg instructions. It is a strong cmpxchg. By default this gets Expanded to the existing ATOMIC_CMP_SWAP during Legalization, so existing backends should see no change in behaviour. If they wish to deal with the enhanced node instead, they can call setOperationAction on it. Beware: as a node with 2 results, it cannot be selected from TableGen. Currently, no use is made of the extra information provided in this patch. Test updates are almost entirely adapting the input IR to the new scheme. Summary for out of tree users: ------------------------------ + Legacy Bitcode files are upgraded during read. + Legacy assembly IR files will be invalid. + Front-ends must adapt to different type for "cmpxchg". + Backends should be unaffected by default. llvm-svn: 210903
2014-06-13 22:24:07 +08:00
%pair = cmpxchg i16 *%src, i16 42, i16 88 seq_cst seq_cst
%res = extractvalue { i16, i1 } %pair, 0
[SystemZ] Add CodeGen test cases This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181204
2013-05-07 00:17:29 +08:00
ret i16 %res
}
[SystemZ] Custom-expand ATOMIC_CMP_AND_SWAP_WITH_SUCCESS The SystemZ compare-and-swap instructions already provide the "success" indication via a condition-code value, so the default expansion of those operations generates an unnecessary extra comparsion. llvm-svn: 314428
2017-09-29 00:22:54 +08:00
; Check generating the comparison result.
define i32 @f3(i16 %dummy, i16 *%src, i16 %cmp, i16 %swap) {
; CHECK-MAIN-LABEL: f3:
; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r3, 0, 189, 0{{$}}
[SystemZ] Enable machine scheduler. The machine scheduler (before register allocation) is enabled by default for SystemZ. The SelectionDAG scheduling preference now becomes source order scheduling (was regpressure). Review: Ulrich Weigand https://reviews.llvm.org/D37977 llvm-svn: 315063
2017-10-06 21:59:28 +08:00
; CHECK-MAIN-DAG: sll %r3, 3
; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
[SystemZ] Custom-expand ATOMIC_CMP_AND_SWAP_WITH_SUCCESS The SystemZ compare-and-swap instructions already provide the "success" indication via a condition-code value, so the default expansion of those operations generates an unnecessary extra comparsion. llvm-svn: 314428
2017-09-29 00:22:54 +08:00
; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
; CHECK-MAIN: rll [[TMP:%r[0-9]+]], [[OLD]], 16(%r3)
; CHECK-MAIN: risbg %r4, [[TMP]], 32, 47, 0
[SystemZ] Fix fall-out from r314428 The expensive-checks build bot found a problem with the r314428 commit: if CC is live after a ATOMIC_CMP_SWAPW instruction, it needs to be marked as live-in to the block after the loop the pseudo gets expanded to. This actually fixes a code-gen bug as well, since if the CC isn't live, the CR and JLH are merged to a CRJLH which doesn't actually set the condition code any more. llvm-svn: 314465
2017-09-29 06:08:25 +08:00
; CHECK-MAIN: cr [[TMP]], %r4
; CHECK-MAIN: jlh [[EXIT:\.[^ ]*]]
[SystemZ] Custom-expand ATOMIC_CMP_AND_SWAP_WITH_SUCCESS The SystemZ compare-and-swap instructions already provide the "success" indication via a condition-code value, so the default expansion of those operations generates an unnecessary extra comparsion. llvm-svn: 314428
2017-09-29 00:22:54 +08:00
; CHECK-MAIN: risbg %r5, [[TMP]], 32, 47, 0
; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r5, -16({{%r[1-9]+}})
; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
; CHECK-MAIN: jl [[LOOP]]
; CHECK-MAIN: [[EXIT]]:
; CHECK-MAIN-NEXT: ipm %r2
; CHECK-MAIN-NEXT: afi %r2, -268435456
; CHECK-MAIN-NEXT: srl %r2, 31
; CHECK-MAIN-NOT: %r2
; CHECK-MAIN: br %r14
;
; CHECK-SHIFT-LABEL: f3:
; CHECK-SHIFT: sll %r3, 3
; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r3
; CHECK-SHIFT: rll
; CHECK-SHIFT: rll {{%r[0-9]+}}, %r5, -16([[NEGSHIFT]])
%pair = cmpxchg i16 *%src, i16 %cmp, i16 %swap seq_cst seq_cst
%val = extractvalue { i16, i1 } %pair, 1
%res = zext i1 %val to i32
ret i32 %res
}
[SystemZ] Directly use CC result of compare-and-swap In order to implement a test whether a compare-and-swap succeeded, the SystemZ back-end currently emits a rather inefficient sequence of first converting the CC result into an integer, and then testing that integer against zero. This commit changes the back-end to simply directly test the CC value set by the compare-and-swap instruction. llvm-svn: 322988
2018-01-20 04:54:18 +08:00
declare void @g()
; Check using the comparison result for a branch.
; CHECK-LABEL: f4
; CHECK-MAIN-LABEL: f4:
; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}}
; CHECK-MAIN-DAG: sll %r2, 3
; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
; CHECK-MAIN: rll [[TMP:%r[0-9]+]], [[OLD]], 16(%r2)
; CHECK-MAIN: risbg %r3, [[TMP]], 32, 47, 0
; CHECK-MAIN: cr [[TMP]], %r3
; CHECK-MAIN: jlh [[EXIT:\.[^ ]*]]
; CHECK-MAIN: risbg %r4, [[TMP]], 32, 47, 0
; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r4, -16({{%r[1-9]+}})
; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
; CHECK-MAIN: jl [[LOOP]]
; CHECK-MAIN: [[EXIT]]:
; CHECK-MAIN-NEXT: jlh [[LABEL:\.[^ ]*]]
; CHECK-MAIN: jg g
; CHECK-MAIN: [[LABEL]]:
; CHECK-MAIN: br %r14
;
; CHECK-SHIFT-LABEL: f4:
; CHECK-SHIFT: sll %r2, 3
; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r2
; CHECK-SHIFT: rll
; CHECK-SHIFT: rll {{%r[0-9]+}}, %r4, -16([[NEGSHIFT]])
define void @f4(i16 *%src, i16 %cmp, i16 %swap) {
%pair = cmpxchg i16 *%src, i16 %cmp, i16 %swap seq_cst seq_cst
%cond = extractvalue { i16, i1 } %pair, 1
br i1 %cond, label %call, label %exit
call:
tail call void @g()
br label %exit
exit:
ret void
}
; ... and the same with the inverted direction.
; CHECK-MAIN-LABEL: f5:
; CHECK-MAIN: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}}
; CHECK-MAIN-DAG: sll %r2, 3
; CHECK-MAIN-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]])
; CHECK-MAIN: [[LOOP:\.[^ ]*]]:
; CHECK-MAIN: rll [[TMP:%r[0-9]+]], [[OLD]], 16(%r2)
; CHECK-MAIN: risbg %r3, [[TMP]], 32, 47, 0
; CHECK-MAIN: cr [[TMP]], %r3
; CHECK-MAIN: jlh [[EXIT:\.[^ ]*]]
; CHECK-MAIN: risbg %r4, [[TMP]], 32, 47, 0
; CHECK-MAIN: rll [[NEW:%r[0-9]+]], %r4, -16({{%r[1-9]+}})
; CHECK-MAIN: cs [[OLD]], [[NEW]], 0([[RISBG]])
; CHECK-MAIN: jl [[LOOP]]
; CHECK-MAIN: [[EXIT]]:
; CHECK-MAIN-NEXT: jlh [[LABEL:\.[^ ]*]]
; CHECK-MAIN: br %r14
; CHECK-MAIN: [[LABEL]]:
; CHECK-MAIN: jg g
;
; CHECK-SHIFT-LABEL: f5:
; CHECK-SHIFT: sll %r2, 3
; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r2
; CHECK-SHIFT: rll
; CHECK-SHIFT: rll {{%r[0-9]+}}, %r4, -16([[NEGSHIFT]])
define void @f5(i16 *%src, i16 %cmp, i16 %swap) {
%pair = cmpxchg i16 *%src, i16 %cmp, i16 %swap seq_cst seq_cst
%cond = extractvalue { i16, i1 } %pair, 1
br i1 %cond, label %exit, label %call
call:
tail call void @g()
br label %exit
exit:
ret void
}