eecb99c5f6
These tests rely on SCEV looking recognizing an "or" with no common bits as an "add". Add the disjoint flag to relevant or instructions in preparation for switching SCEV to use the flag instead of the ValueTracking query. The IR with disjoint flag matches what InstCombine would produce.
202 lines
11 KiB
LLVM
202 lines
11 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
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; PR41445: This test checks the case when LSR split critical edge
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; and phi node has other pending fixup operands
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; RUN: opt -S -loop-reduce < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; We have %indvars.iv.lcssa phi node where 4 input operands
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; need to be rewritten: %tmp1, %tmp2, %tmp3, %tmp4.
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; When we try to rewrite %tmp1, we first split the critical edge.
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; All the other PHI inputs besides %tmp1 go to a new phi node.
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; This test checks that LSR is still able to rewrite %tmp2, %tmp3, %tmp4.
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define i32 @foo(ptr %A, i32 %t) {
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; CHECK-LABEL: define i32 @foo(
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; CHECK-SAME: ptr [[A:%.*]], i32 [[T:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP_32:%.*]]
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; CHECK: loop.exit.loopexitsplitsplitsplit:
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; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[LSR_IV:%.*]], -1
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; CHECK-NEXT: br label [[LOOP_EXIT_LOOPEXITSPLITSPLIT:%.*]]
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; CHECK: ifmerge.38.loop.exit.loopexitsplitsplit_crit_edge:
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; CHECK-NEXT: [[LSR_IV_LCSSA10:%.*]] = phi i64 [ [[LSR_IV]], [[IFMERGE_38:%.*]] ]
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; CHECK-NEXT: br label [[LOOP_EXIT_LOOPEXITSPLITSPLIT]]
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; CHECK: loop.exit.loopexitsplitsplit:
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; CHECK-NEXT: [[INDVARS_IV_LCSSA_PH_PH_PH:%.*]] = phi i64 [ [[LSR_IV_LCSSA10]], [[IFMERGE_38_LOOP_EXIT_LOOPEXITSPLITSPLIT_CRIT_EDGE:%.*]] ], [ [[TMP0]], [[LOOP_EXIT_LOOPEXITSPLITSPLITSPLIT:%.*]] ]
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; CHECK-NEXT: br label [[LOOP_EXIT_LOOPEXITSPLIT:%.*]]
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; CHECK: ifmerge.42.loop.exit.loopexitsplit_crit_edge:
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; CHECK-NEXT: [[LSR_IV_LCSSA11:%.*]] = phi i64 [ [[LSR_IV]], [[IFMERGE_42:%.*]] ]
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; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[LSR_IV_LCSSA11]], 1
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; CHECK-NEXT: br label [[LOOP_EXIT_LOOPEXITSPLIT]]
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; CHECK: loop.exit.loopexitsplit:
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; CHECK-NEXT: [[INDVARS_IV_LCSSA_PH_PH:%.*]] = phi i64 [ [[TMP1]], [[IFMERGE_42_LOOP_EXIT_LOOPEXITSPLIT_CRIT_EDGE:%.*]] ], [ [[INDVARS_IV_LCSSA_PH_PH_PH]], [[LOOP_EXIT_LOOPEXITSPLITSPLIT]] ]
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; CHECK-NEXT: br label [[LOOP_EXIT_LOOPEXIT:%.*]]
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; CHECK: then.34.loop.exit.loopexit_crit_edge:
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; CHECK-NEXT: [[LSR_IV_LCSSA:%.*]] = phi i64 [ [[LSR_IV]], [[THEN_34:%.*]] ]
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; CHECK-NEXT: [[TMP2:%.*]] = add i64 [[LSR_IV_LCSSA]], -2
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; CHECK-NEXT: br label [[LOOP_EXIT_LOOPEXIT]]
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; CHECK: loop.exit.loopexit:
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; CHECK-NEXT: [[INDVARS_IV_LCSSA_PH:%.*]] = phi i64 [ [[TMP2]], [[THEN_34_LOOP_EXIT_LOOPEXIT_CRIT_EDGE:%.*]] ], [ [[INDVARS_IV_LCSSA_PH_PH]], [[LOOP_EXIT_LOOPEXITSPLIT]] ]
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; CHECK-NEXT: br label [[LOOP_EXIT:%.*]]
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; CHECK: loop.exit:
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; CHECK-NEXT: [[INDVARS_IV_LCSSA:%.*]] = phi i64 [ 48, [[THEN_8:%.*]] ], [ 49, [[THEN_8_1:%.*]] ], [ [[INDVARS_IV_LCSSA_PH]], [[LOOP_EXIT_LOOPEXIT]] ]
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; CHECK-NEXT: [[TMP:%.*]] = trunc i64 [[INDVARS_IV_LCSSA]] to i32
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; CHECK-NEXT: br label [[FOR_END:%.*]]
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; CHECK: for.end:
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; CHECK-NEXT: [[I_0_LCSSA:%.*]] = phi i32 [ [[TMP]], [[LOOP_EXIT]] ], [ 50, [[THEN_8_1]] ], [ 50, [[IFMERGE_8:%.*]] ]
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; CHECK-NEXT: ret i32 [[I_0_LCSSA]]
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; CHECK: loop.32:
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; CHECK-NEXT: [[LSR_IV]] = phi i64 [ [[LSR_IV_NEXT:%.*]], [[IFMERGE_46:%.*]] ], [ 2, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[I1_I64_0:%.*]] = phi i64 [ 0, [[ENTRY]] ], [ [[NEXTIVLOOP_32:%.*]], [[IFMERGE_46]] ]
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; CHECK-NEXT: [[TMP3:%.*]] = shl nuw nsw i64 [[LSR_IV]], 2
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; CHECK-NEXT: [[SCEVGEP7:%.*]] = getelementptr i8, ptr [[A]], i64 [[TMP3]]
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; CHECK-NEXT: [[SCEVGEP8:%.*]] = getelementptr i8, ptr [[SCEVGEP7]], i64 -4
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; CHECK-NEXT: [[GEPLOAD:%.*]] = load i32, ptr [[SCEVGEP8]], align 4
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; CHECK-NEXT: [[CMP_34:%.*]] = icmp sgt i32 [[GEPLOAD]], [[T]]
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; CHECK-NEXT: br i1 [[CMP_34]], label [[THEN_34]], label [[IFMERGE_34:%.*]]
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; CHECK: then.34:
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; CHECK-NEXT: [[TMP4:%.*]] = shl nuw nsw i64 [[LSR_IV]], 2
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; CHECK-NEXT: [[SCEVGEP5:%.*]] = getelementptr i8, ptr [[A]], i64 [[TMP4]]
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; CHECK-NEXT: [[SCEVGEP6:%.*]] = getelementptr i8, ptr [[SCEVGEP5]], i64 -8
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; CHECK-NEXT: [[GEPLOAD18:%.*]] = load i32, ptr [[SCEVGEP6]], align 4
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; CHECK-NEXT: [[CMP_35:%.*]] = icmp slt i32 [[GEPLOAD18]], [[T]]
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; CHECK-NEXT: br i1 [[CMP_35]], label [[THEN_34_LOOP_EXIT_LOOPEXIT_CRIT_EDGE]], label [[IFMERGE_34]]
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; CHECK: ifmerge.34:
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; CHECK-NEXT: [[TMP5:%.*]] = shl nuw nsw i64 [[LSR_IV]], 2
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; CHECK-NEXT: [[SCEVGEP4:%.*]] = getelementptr i8, ptr [[A]], i64 [[TMP5]]
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; CHECK-NEXT: [[GEPLOAD20:%.*]] = load i32, ptr [[SCEVGEP4]], align 4
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; CHECK-NEXT: [[CMP_38:%.*]] = icmp sgt i32 [[GEPLOAD20]], [[T]]
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; CHECK-NEXT: [[CMP_39:%.*]] = icmp slt i32 [[GEPLOAD]], [[T]]
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; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[CMP_38]], [[CMP_39]]
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; CHECK-NEXT: br i1 [[OR_COND]], label [[LOOP_EXIT_LOOPEXITSPLITSPLITSPLIT]], label [[IFMERGE_38]]
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; CHECK: ifmerge.38:
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; CHECK-NEXT: [[TMP6:%.*]] = shl nuw nsw i64 [[LSR_IV]], 2
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; CHECK-NEXT: [[SCEVGEP2:%.*]] = getelementptr i8, ptr [[A]], i64 [[TMP6]]
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; CHECK-NEXT: [[SCEVGEP3:%.*]] = getelementptr i8, ptr [[SCEVGEP2]], i64 4
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; CHECK-NEXT: [[GEPLOAD24:%.*]] = load i32, ptr [[SCEVGEP3]], align 4
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; CHECK-NEXT: [[CMP_42:%.*]] = icmp sgt i32 [[GEPLOAD24]], [[T]]
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; CHECK-NEXT: [[CMP_43:%.*]] = icmp slt i32 [[GEPLOAD20]], [[T]]
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; CHECK-NEXT: [[OR_COND55:%.*]] = and i1 [[CMP_42]], [[CMP_43]]
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; CHECK-NEXT: br i1 [[OR_COND55]], label [[IFMERGE_38_LOOP_EXIT_LOOPEXITSPLITSPLIT_CRIT_EDGE]], label [[IFMERGE_42]]
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; CHECK: ifmerge.42:
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; CHECK-NEXT: [[TMP7:%.*]] = shl nuw nsw i64 [[LSR_IV]], 2
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; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[A]], i64 [[TMP7]]
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; CHECK-NEXT: [[SCEVGEP1:%.*]] = getelementptr i8, ptr [[SCEVGEP]], i64 8
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; CHECK-NEXT: [[GEPLOAD28:%.*]] = load i32, ptr [[SCEVGEP1]], align 4
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; CHECK-NEXT: [[CMP_46:%.*]] = icmp sgt i32 [[GEPLOAD28]], [[T]]
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; CHECK-NEXT: [[CMP_47:%.*]] = icmp slt i32 [[GEPLOAD24]], [[T]]
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; CHECK-NEXT: [[OR_COND56:%.*]] = and i1 [[CMP_46]], [[CMP_47]]
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; CHECK-NEXT: br i1 [[OR_COND56]], label [[IFMERGE_42_LOOP_EXIT_LOOPEXITSPLIT_CRIT_EDGE]], label [[IFMERGE_46]]
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; CHECK: ifmerge.46:
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; CHECK-NEXT: [[NEXTIVLOOP_32]] = add nuw nsw i64 [[I1_I64_0]], 1
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; CHECK-NEXT: [[LSR_IV_NEXT]] = add nuw nsw i64 [[LSR_IV]], 4
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; CHECK-NEXT: [[CONDLOOP_32:%.*]] = icmp ult i64 [[NEXTIVLOOP_32]], 12
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; CHECK-NEXT: br i1 [[CONDLOOP_32]], label [[LOOP_32]], label [[LOOP_25:%.*]]
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; CHECK: loop.25:
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; CHECK-NEXT: [[ARRAYIDX31:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 49
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; CHECK-NEXT: [[GEPLOAD32:%.*]] = load i32, ptr [[ARRAYIDX31]], align 4
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; CHECK-NEXT: [[CMP_8:%.*]] = icmp sgt i32 [[GEPLOAD32]], [[T]]
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; CHECK-NEXT: br i1 [[CMP_8]], label [[THEN_8]], label [[IFMERGE_8]]
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; CHECK: then.8:
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; CHECK-NEXT: [[ARRAYIDX33:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 48
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; CHECK-NEXT: [[GEPLOAD34:%.*]] = load i32, ptr [[ARRAYIDX33]], align 4
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; CHECK-NEXT: [[CMP_15:%.*]] = icmp slt i32 [[GEPLOAD34]], [[T]]
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; CHECK-NEXT: br i1 [[CMP_15]], label [[LOOP_EXIT]], label [[IFMERGE_8]]
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; CHECK: ifmerge.8:
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; CHECK-NEXT: [[ARRAYIDX31_1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 50
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; CHECK-NEXT: [[GEPLOAD32_1:%.*]] = load i32, ptr [[ARRAYIDX31_1]], align 4
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; CHECK-NEXT: [[CMP_8_1:%.*]] = icmp sgt i32 [[GEPLOAD32_1]], [[T]]
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; CHECK-NEXT: br i1 [[CMP_8_1]], label [[THEN_8_1]], label [[FOR_END]]
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; CHECK: then.8.1:
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; CHECK-NEXT: [[ARRAYIDX33_1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 49
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; CHECK-NEXT: [[GEPLOAD34_1:%.*]] = load i32, ptr [[ARRAYIDX33_1]], align 4
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; CHECK-NEXT: [[CMP_15_1:%.*]] = icmp slt i32 [[GEPLOAD34_1]], [[T]]
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; CHECK-NEXT: br i1 [[CMP_15_1]], label [[LOOP_EXIT]], label [[FOR_END]]
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;
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entry:
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br label %loop.32
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loop.exit: ; preds = %then.8.1, %then.8, %ifmerge.42, %ifmerge.38, %ifmerge.34, %then.34
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%indvars.iv.lcssa = phi i64 [ 48, %then.8 ], [ 49, %then.8.1 ], [ %tmp4, %ifmerge.42 ], [ %tmp3, %ifmerge.38 ], [ %tmp2, %ifmerge.34 ], [ %tmp1, %then.34 ]
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%tmp = trunc i64 %indvars.iv.lcssa to i32
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br label %for.end
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for.end: ; preds = %then.8.1, %ifmerge.8, %loop.exit
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%i.0.lcssa = phi i32 [ %tmp, %loop.exit ], [ 50, %then.8.1 ], [ 50, %ifmerge.8 ]
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ret i32 %i.0.lcssa
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; shl instruction will be dead eliminated when all it's uses will be rewritten.
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loop.32: ; preds = %ifmerge.46, %entry
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%i1.i64.0 = phi i64 [ 0, %entry ], [ %nextivloop.32, %ifmerge.46 ]
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%tmp1 = shl i64 %i1.i64.0, 2
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%tmp2 = or disjoint i64 %tmp1, 1
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%arrayIdx = getelementptr inbounds i32, ptr %A, i64 %tmp2
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%gepload = load i32, ptr %arrayIdx, align 4
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%cmp.34 = icmp sgt i32 %gepload, %t
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br i1 %cmp.34, label %then.34, label %ifmerge.34
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then.34: ; preds = %loop.32
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%arrayIdx17 = getelementptr inbounds i32, ptr %A, i64 %tmp1
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%gepload18 = load i32, ptr %arrayIdx17, align 4
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%cmp.35 = icmp slt i32 %gepload18, %t
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br i1 %cmp.35, label %loop.exit, label %ifmerge.34
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ifmerge.34: ; preds = %then.34, %loop.32
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%tmp3 = or disjoint i64 %tmp1, 2
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%arrayIdx19 = getelementptr inbounds i32, ptr %A, i64 %tmp3
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%gepload20 = load i32, ptr %arrayIdx19, align 4
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%cmp.38 = icmp sgt i32 %gepload20, %t
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%cmp.39 = icmp slt i32 %gepload, %t
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%or.cond = and i1 %cmp.38, %cmp.39
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br i1 %or.cond, label %loop.exit, label %ifmerge.38
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ifmerge.38: ; preds = %ifmerge.34
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%tmp4 = or disjoint i64 %tmp1, 3
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%arrayIdx23 = getelementptr inbounds i32, ptr %A, i64 %tmp4
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%gepload24 = load i32, ptr %arrayIdx23, align 4
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%cmp.42 = icmp sgt i32 %gepload24, %t
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%cmp.43 = icmp slt i32 %gepload20, %t
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%or.cond55 = and i1 %cmp.42, %cmp.43
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br i1 %or.cond55, label %loop.exit, label %ifmerge.42
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ifmerge.42: ; preds = %ifmerge.38
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%tmp5 = add i64 %tmp1, 4
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%arrayIdx27 = getelementptr inbounds i32, ptr %A, i64 %tmp5
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%gepload28 = load i32, ptr %arrayIdx27, align 4
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%cmp.46 = icmp sgt i32 %gepload28, %t
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%cmp.47 = icmp slt i32 %gepload24, %t
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%or.cond56 = and i1 %cmp.46, %cmp.47
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br i1 %or.cond56, label %loop.exit, label %ifmerge.46
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ifmerge.46: ; preds = %ifmerge.42
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%nextivloop.32 = add nuw nsw i64 %i1.i64.0, 1
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%condloop.32 = icmp ult i64 %nextivloop.32, 12
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br i1 %condloop.32, label %loop.32, label %loop.25
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loop.25: ; preds = %ifmerge.46
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%arrayIdx31 = getelementptr inbounds i32, ptr %A, i64 49
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%gepload32 = load i32, ptr %arrayIdx31, align 4
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%cmp.8 = icmp sgt i32 %gepload32, %t
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br i1 %cmp.8, label %then.8, label %ifmerge.8
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then.8: ; preds = %loop.25
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%arrayIdx33 = getelementptr inbounds i32, ptr %A, i64 48
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%gepload34 = load i32, ptr %arrayIdx33, align 4
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%cmp.15 = icmp slt i32 %gepload34, %t
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br i1 %cmp.15, label %loop.exit, label %ifmerge.8
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ifmerge.8: ; preds = %then.8, %loop.25
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%arrayIdx31.1 = getelementptr inbounds i32, ptr %A, i64 50
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%gepload32.1 = load i32, ptr %arrayIdx31.1, align 4
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%cmp.8.1 = icmp sgt i32 %gepload32.1, %t
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br i1 %cmp.8.1, label %then.8.1, label %for.end
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then.8.1: ; preds = %ifmerge.8
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%arrayIdx33.1 = getelementptr inbounds i32, ptr %A, i64 49
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%gepload34.1 = load i32, ptr %arrayIdx33.1, align 4
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%cmp.15.1 = icmp slt i32 %gepload34.1, %t
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br i1 %cmp.15.1, label %loop.exit, label %for.end
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}
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