e7dc083a41
It turns our that the BranchFolder and IfCvt does not like unanalyzable
branches that fall-through. This means that removing the unconditional
branches from the end of tail predicated instruction can run into
asserts and verifier issues.
This effectively reverts 372eb2bbb6, but
adds handling to t2DoLoopEndDec which are not branches, so can be safely
skipped.
97 lines
4.0 KiB
LLVM
97 lines
4.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=thumbv8.1m.main -mattr=+lob --verify-machineinstrs %s -o - | FileCheck %s
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define arm_aapcs_vfpcc void @test(i16* noalias nocapture readonly %off, i16* noalias nocapture %data, i16* noalias nocapture %dst, i32 %n) {
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; CHECK-LABEL: test:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: push.w {r4, r5, r6, r7, r8, lr}
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; CHECK-NEXT: cmp r3, #1
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; CHECK-NEXT: blt .LBB0_7
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; CHECK-NEXT: @ %bb.1: @ %for.cond1.preheader.us.preheader
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; CHECK-NEXT: mov r8, r3
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; CHECK-NEXT: lsl.w r12, r3, #1
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; CHECK-NEXT: movs r3, #0
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; CHECK-NEXT: mov r4, r1
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; CHECK-NEXT: .LBB0_2: @ %for.cond1.preheader.us
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; CHECK-NEXT: @ =>This Loop Header: Depth=1
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; CHECK-NEXT: @ Child Loop BB0_3 Depth 2
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; CHECK-NEXT: @ Child Loop BB0_5 Depth 2
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; CHECK-NEXT: dls lr, r8
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; CHECK-NEXT: movs r6, #0
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; CHECK-NEXT: .LBB0_3: @ %for.body4.us
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; CHECK-NEXT: @ Parent Loop BB0_2 Depth=1
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; CHECK-NEXT: @ => This Inner Loop Header: Depth=2
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; CHECK-NEXT: ldrh.w r5, [r0, r6, lsl #1]
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; CHECK-NEXT: ldrh.w r7, [r1, r6, lsl #1]
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; CHECK-NEXT: add r5, r7
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; CHECK-NEXT: strh.w r5, [r4, r6, lsl #1]
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; CHECK-NEXT: adds r6, #1
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; CHECK-NEXT: le lr, .LBB0_3
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; CHECK-NEXT: @ %bb.4: @ %for.body15.us.preheader
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; CHECK-NEXT: @ in Loop: Header=BB0_2 Depth=1
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; CHECK-NEXT: dls lr, r8
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; CHECK-NEXT: movs r6, #0
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; CHECK-NEXT: .LBB0_5: @ %for.body15.us
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; CHECK-NEXT: @ Parent Loop BB0_2 Depth=1
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; CHECK-NEXT: @ => This Inner Loop Header: Depth=2
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; CHECK-NEXT: ldrh.w r7, [r0, r6, lsl #1]
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; CHECK-NEXT: ldrh.w r5, [r1, r6, lsl #1]
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; CHECK-NEXT: add r5, r7
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; CHECK-NEXT: strh.w r5, [r2, r6, lsl #1]
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; CHECK-NEXT: adds r6, #1
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; CHECK-NEXT: le lr, .LBB0_5
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; CHECK-NEXT: @ %bb.6: @ %for.cond.cleanup14.us
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; CHECK-NEXT: @ in Loop: Header=BB0_2 Depth=1
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; CHECK-NEXT: adds r3, #1
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; CHECK-NEXT: add r2, r12
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; CHECK-NEXT: add r4, r12
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; CHECK-NEXT: cmp r3, r8
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; CHECK-NEXT: bne .LBB0_2
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; CHECK-NEXT: .LBB0_7: @ %for.cond.cleanup
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; CHECK-NEXT: pop.w {r4, r5, r6, r7, r8, pc}
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entry:
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%cmp252 = icmp sgt i32 %n, 0
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br i1 %cmp252, label %for.cond1.preheader.us, label %for.cond.cleanup
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for.cond1.preheader.us: ; preds = %entry, %for.cond.cleanup14.us
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%i.057.us = phi i32 [ %inc29.us, %for.cond.cleanup14.us ], [ 0, %entry ]
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%mul.us = mul i32 %i.057.us, %n
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br label %for.body4.us
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for.cond.cleanup14.us: ; preds = %for.body15.us
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%inc29.us = add nuw i32 %i.057.us, 1
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%exitcond94 = icmp eq i32 %inc29.us, %n
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br i1 %exitcond94, label %for.cond.cleanup, label %for.cond1.preheader.us
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for.body15.us: ; preds = %for.body4.us, %for.body15.us
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%j10.055.us = phi i32 [ %inc26.us, %for.body15.us ], [ 0, %for.body4.us ]
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%arrayidx16.us = getelementptr inbounds i16, i16* %off, i32 %j10.055.us
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%0 = load i16, i16* %arrayidx16.us, align 2
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%arrayidx18.us = getelementptr inbounds i16, i16* %data, i32 %j10.055.us
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%1 = load i16, i16* %arrayidx18.us, align 2
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%add20.us = add i16 %1, %0
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%add23.us = add i32 %j10.055.us, %mul.us
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%arrayidx24.us = getelementptr inbounds i16, i16* %dst, i32 %add23.us
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store i16 %add20.us, i16* %arrayidx24.us, align 2
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%inc26.us = add nuw nsw i32 %j10.055.us, 1
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%exitcond93 = icmp eq i32 %inc26.us, %n
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br i1 %exitcond93, label %for.cond.cleanup14.us, label %for.body15.us
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for.body4.us: ; preds = %for.body4.us, %for.cond1.preheader.us
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%j.053.us = phi i32 [ 0, %for.cond1.preheader.us ], [ %inc.us, %for.body4.us ]
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%arrayidx.us = getelementptr inbounds i16, i16* %off, i32 %j.053.us
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%2 = load i16, i16* %arrayidx.us, align 2
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%arrayidx5.us = getelementptr inbounds i16, i16* %data, i32 %j.053.us
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%3 = load i16, i16* %arrayidx5.us, align 2
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%add.us = add i16 %3, %2
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%add8.us = add i32 %j.053.us, %mul.us
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%arrayidx9.us = getelementptr inbounds i16, i16* %data, i32 %add8.us
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store i16 %add.us, i16* %arrayidx9.us, align 2
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%inc.us = add nuw nsw i32 %j.053.us, 1
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%exitcond = icmp eq i32 %inc.us, %n
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br i1 %exitcond, label %for.body15.us, label %for.body4.us
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for.cond.cleanup: ; preds = %for.cond.cleanup14.us, %entry
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ret void
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}
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