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[UnrollRuntime] NFC: Updated exiting tests and added more tests
Added more tests for multiple exiting blocks to the LatchExit. Today these cases are not supported. Patch to follow soon. llvm-svn: 350135
This commit is contained in:
Anna Thomas
parent
7e2c50dd6b
commit
c2716159d0
@ -207,43 +207,165 @@ exit2.loopexit:
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}
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; FIXME: Support multiple exiting blocks to the same latch exit block.
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define i32 @test4(i32* nocapture %a, i64 %n, i1 %cond) {
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; EPILOG: test4(
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; Three exiting blocks where header and latch exit to same LatchExit.
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define i32 @hdr_latch_same_exit(i32* nocapture %a, i64 %n, i1 %cond) {
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; EPILOG: hdr_latch_same_exit(
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; EPILOG-NOT: .unr
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; EPILOG-NOT: .epil
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; PROLOG: test4(
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; PROLOG: hdr_latch_same_exit(
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; PROLOG-NOT: .unr
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; PROLOG-NOT: .prol
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entry:
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br label %header
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header:
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ]
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br i1 %cond, label %for.end, label %for.exiting_block
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%indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
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%sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ]
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br i1 %cond, label %latchExit, label %for.exiting_block
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for.exiting_block:
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%cmp = icmp eq i64 %n, 42
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br i1 %cmp, label %for.exit2, label %for.body
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br i1 %cmp, label %for.exit2, label %latch
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for.body: ; preds = %for.body, %entry
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latch: ; preds = %latch, %entry
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, %sum.02
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%indvars.iv.next = add i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, %n
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br i1 %exitcond, label %for.end, label %header
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br i1 %exitcond, label %latchExit, label %header
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for.end: ; preds = %for.body, %entry
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%sum.0.lcssa = phi i32 [ 0, %header ], [ %add, %for.body ]
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ret i32 %sum.0.lcssa
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latchExit: ; preds = %latch, %entry
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%result = phi i32 [ 0, %header ], [ %add, %latch ]
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ret i32 %result
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for.exit2:
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ret i32 42
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}
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; FIXME: Support multiple exiting blocks to the unique exit block.
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; Two exiting blocks to latch where the exiting blocks are Latch and a
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; non-header
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; FIXME: We should unroll this loop.
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define i32 @otherblock_latch_same_exit(i32* nocapture %a, i64 %n, i1 %cond) {
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; EPILOG: otherblock_latch_same_exit(
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; EPILOG-NOT: .unr
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; EPILOG-NOT: .epil
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; PROLOG: otherblock_latch_same_exit(
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; PROLOG-NOT: .unr
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; PROLOG-NOT: .prol
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entry:
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br label %header
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header:
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%indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
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%sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ]
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br i1 %cond, label %for.exit2, label %for.exiting_block
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for.exiting_block:
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%cmp = icmp eq i64 %n, 42
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br i1 %cmp, label %latchExit, label %latch
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latch: ; preds = %latch, %entry
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, %sum.02
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%indvars.iv.next = add i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, %n
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br i1 %exitcond, label %latchExit, label %header
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latchExit: ; preds = %latch, %entry
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%result = phi i32 [ 2, %for.exiting_block ], [ %add, %latch ]
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ret i32 %result
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for.exit2:
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ret i32 42
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}
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; Two exiting blocks to latch where the exiting blocks are Latch and a
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; non-header
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; Same as above test except the incoming value for latch Phi is from the header
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; FIXME: We should be able to runtime unroll.
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define i32 @otherblock_latch_same_exit2(i32* nocapture %a, i64 %n, i1 %cond) {
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; EPILOG: otherblock_latch_same_exit2(
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; EPILOG-NOT: .unr
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; EPILOG-NOT: .epil
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; PROLOG: otherblock_latch_same_exit2(
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; PROLOG-NOT: .unr
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; PROLOG-NOT: .prol
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entry:
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br label %header
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header:
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%indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
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%sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ]
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br i1 %cond, label %for.exit2, label %for.exiting_block
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for.exiting_block:
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%cmp = icmp eq i64 %n, 42
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br i1 %cmp, label %latchExit, label %latch
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latch: ; preds = %latch, %entry
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, %sum.02
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%indvars.iv.next = add i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, %n
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br i1 %exitcond, label %latchExit, label %header
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latchExit: ; preds = %latch, %entry
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%result = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %latch ]
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ret i32 %result
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for.exit2:
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ret i32 42
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}
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; Two exiting blocks to latch where the exiting blocks are Latch and a
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; non-header
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; Same as above test except the incoming value for cloned latch Phi is from the
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; for.exiting_block.
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; FIXME: We should be able to runtime unroll.
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define i32 @otherblock_latch_same_exit3(i32* nocapture %a, i64 %n, i1 %cond) {
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; EPILOG: otherblock_latch_same_exit3(
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; EPILOG-NOT: .unr
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; EPILOG-NOT: .epil
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; PROLOG: otherblock_latch_same_exit3(
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; PROLOG-NOT: .unr
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; PROLOG-NOT: .prol
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entry:
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br label %header
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header:
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%indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %entry ]
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%sum.02 = phi i32 [ %add, %latch ], [ 0, %entry ]
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br i1 %cond, label %for.exit2, label %for.exiting_block
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for.exiting_block:
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, %sum.02
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%cmp = icmp eq i64 %n, 42
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br i1 %cmp, label %latchExit, label %latch
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latch: ; preds = %latch, %entry
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%indvars.iv.next = add i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, %n
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br i1 %exitcond, label %latchExit, label %header
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latchExit: ; preds = %latch, %entry
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%result = phi i32 [ %sum.02, %for.exiting_block ], [ %add, %latch ]
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ret i32 %result
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for.exit2:
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ret i32 42
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}
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; FIXME: Support multiple exiting blocks to the unique exit block (LatchExit).
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; Only 2 blocks in loop: header and latch where both exit to same LatchExit.
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define void @unique_exit(i32 %arg) {
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; EPILOG: unique_exit(
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; EPILOG-NOT: .unr
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@ -259,22 +381,22 @@ entry:
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preheader: ; preds = %entry
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br label %header
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LoopExit: ; preds = %header, %latch
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%tmp2.ph = phi i32 [ %tmp4, %header ], [ -1, %latch ]
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br label %returnblock
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returnblock: ; preds = %LoopExit, %entry
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%tmp2 = phi i32 [ -1, %entry ], [ %tmp2.ph, %LoopExit ]
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ret void
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header: ; preds = %preheader, %latch
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%tmp4 = phi i32 [ %inc, %latch ], [ %arg, %preheader ]
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%inc = add nsw i32 %tmp4, 1
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br i1 true, label %LoopExit, label %latch
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br i1 true, label %latchExit, label %latch
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latch: ; preds = %header
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%cmp = icmp slt i32 %inc, undef
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br i1 %cmp, label %header, label %LoopExit
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br i1 %cmp, label %header, label %latchExit
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latchExit: ; preds = %header, %latch
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%tmp2.ph = phi i32 [ %tmp4, %header ], [ -1, %latch ]
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br label %returnblock
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returnblock: ; preds = %latchExit, %entry
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%tmp2 = phi i32 [ -1, %entry ], [ %tmp2.ph, %latchExit ]
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ret void
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}
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; two exiting and two exit blocks.
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