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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals2; RUN: opt -S -passes="jump-threading" -debug-only=branch-prob < %s 2>&1 | FileCheck %s3; RUN: opt -S -passes="require<branch-prob>,jump-threading" -debug-only=branch-prob < %s 2>&1 | FileCheck -check-prefixes=CHECK,CHECK-BPI %s4; REQUIRES: asserts5 6; CHECK-BPI-LABEL: ---- Branch Probability Info : unfold1 ----7; CHECK-BPI: set edge cond.false -> 0 successor probability to 0x20000000 / 0x80000000 = 25.00%8; CHECK-BPI: set edge cond.false -> 1 successor probability to 0x60000000 / 0x80000000 = 75.00%9; CHECK-BPI-LABEL: ---- Branch Probability Info : unfold2 ----10; CHECK-BPI: set edge cond.false -> 0 successor probability to 0x20000000 / 0x80000000 = 25.00%11; CHECK-BPI: set edge cond.false -> 1 successor probability to 0x60000000 / 0x80000000 = 75.00%12 13declare void @foo()14declare void @bar()15declare void @baz()16declare void @quux()17 18 19; Jump threading of branch with select as condition.20; Mostly theoretical since instruction combining simplifies all selects of21; booleans where at least one operand is true/false/undef.22 23;.24; CHECK: @[[ANCHOR:[a-zA-Z0-9_$"\\.-]+]] = constant [3 x ptr] [ptr blockaddress(@test_indirectbr, [[L1:%.*]]), ptr inttoptr (i32 1 to ptr), ptr blockaddress(@test_indirectbr, [[L3:%.*]])]25;.26define void @test_br(i1 %cond, i1 %value) nounwind {27; CHECK-LABEL: @test_br(28; CHECK-NEXT: entry:29; CHECK-NEXT: br i1 [[COND:%.*]], label [[L1:%.*]], label [[L0:%.*]]30; CHECK: L0:31; CHECK-NEXT: call void @baz()32; CHECK-NEXT: [[EXPR:%.*]] = select i1 [[COND]], i1 true, i1 [[VALUE:%.*]]33; CHECK-NEXT: br i1 [[EXPR]], label [[L1]], label [[L2:%.*]]34; CHECK: L1:35; CHECK-NEXT: call void @foo()36; CHECK-NEXT: ret void37; CHECK: L2:38; CHECK-NEXT: call void @bar()39; CHECK-NEXT: ret void40;41entry:42 br i1 %cond, label %L0, label %L343L0:44 %expr = select i1 %cond, i1 true, i1 %value45 br i1 %expr, label %L1, label %L246 47L1:48 call void @foo()49 ret void50L2:51 call void @bar()52 ret void53L3:54 call void @baz()55 br label %L056}57 58 59; Jump threading of switch with select as condition.60 61define void @test_switch(i1 %cond, i8 %value) nounwind {62; CHECK-LABEL: @test_switch(63; CHECK-NEXT: entry:64; CHECK-NEXT: br i1 [[COND:%.*]], label [[L1:%.*]], label [[L0:%.*]]65; CHECK: L0:66; CHECK-NEXT: call void @quux()67; CHECK-NEXT: [[EXPR:%.*]] = select i1 [[COND]], i8 1, i8 [[VALUE:%.*]]68; CHECK-NEXT: switch i8 [[EXPR]], label [[L3:%.*]] [69; CHECK-NEXT: i8 1, label [[L1]]70; CHECK-NEXT: i8 2, label [[L2:%.*]]71; CHECK-NEXT: ]72; CHECK: L1:73; CHECK-NEXT: call void @foo()74; CHECK-NEXT: ret void75; CHECK: L2:76; CHECK-NEXT: call void @bar()77; CHECK-NEXT: ret void78; CHECK: L3:79; CHECK-NEXT: call void @baz()80; CHECK-NEXT: ret void81;82entry:83 br i1 %cond, label %L0, label %L484L0:85 %expr = select i1 %cond, i8 1, i8 %value86 switch i8 %expr, label %L3 [i8 1, label %L1 i8 2, label %L2]87 88L1:89 call void @foo()90 ret void91L2:92 call void @bar()93 ret void94L3:95 call void @baz()96 ret void97L4:98 call void @quux()99 br label %L0100}101 102; Make sure the blocks in the indirectbr test aren't trivially removable as103; successors by taking their addresses.104@anchor = constant [3 x ptr] [105 ptr blockaddress(@test_indirectbr, %L1),106 ptr blockaddress(@test_indirectbr, %L2),107 ptr blockaddress(@test_indirectbr, %L3)108]109 110 111; Jump threading of indirectbr with select as address.112 113define void @test_indirectbr(i1 %cond, ptr %address) nounwind {114; CHECK-LABEL: @test_indirectbr(115; CHECK-NEXT: entry:116; CHECK-NEXT: br i1 [[COND:%.*]], label [[L1:%.*]], label [[L3:%.*]]117; CHECK: L1:118; CHECK-NEXT: call void @foo()119; CHECK-NEXT: ret void120; CHECK: L3:121; CHECK-NEXT: call void @baz()122; CHECK-NEXT: ret void123;124entry:125 br i1 %cond, label %L0, label %L3126L0:127 %indirect.goto.dest = select i1 %cond, ptr blockaddress(@test_indirectbr, %L1), ptr %address128 indirectbr ptr %indirect.goto.dest, [label %L1, label %L2, label %L3]129 130L1:131 call void @foo()132 ret void133L2:134 call void @bar()135 ret void136L3:137 call void @baz()138 ret void139}140 141 142; Jump threading of indirectbr with select as address. Test increased143; duplication threshold for cases where indirectbr is being threaded144; through.145 146define void @test_indirectbr_thresh(i1 %cond, ptr %address) nounwind {147; CHECK-LABEL: @test_indirectbr_thresh(148; CHECK-NEXT: entry:149; CHECK-NEXT: br i1 [[COND:%.*]], label [[L1:%.*]], label [[L3:%.*]]150; CHECK: L1:151; CHECK-NEXT: call void @quux()152; CHECK-NEXT: call void @quux()153; CHECK-NEXT: call void @quux()154; CHECK-NEXT: call void @foo()155; CHECK-NEXT: ret void156; CHECK: L3:157; CHECK-NEXT: call void @baz()158; CHECK-NEXT: ret void159;160entry:161 br i1 %cond, label %L0, label %L3162L0:163 %indirect.goto.dest = select i1 %cond, ptr blockaddress(@test_indirectbr_thresh, %L1), ptr %address164 call void @quux()165 call void @quux()166 call void @quux()167 indirectbr ptr %indirect.goto.dest, [label %L1, label %L2, label %L3]168 169L1:170 call void @foo()171 ret void172L2:173 call void @bar()174 ret void175L3:176 call void @baz()177 ret void178}179 180 181; A more complicated case: the condition is a select based on a comparison.182 183define void @test_switch_cmp(i1 %cond, i32 %val, i8 %value) nounwind {184; CHECK-LABEL: @test_switch_cmp(185; CHECK-NEXT: entry:186; CHECK-NEXT: br i1 [[COND:%.*]], label [[L0:%.*]], label [[L0_THREAD:%.*]]187; CHECK: L0:188; CHECK-NEXT: [[VAL_PHI:%.*]] = phi i32 [ [[VAL:%.*]], [[ENTRY:%.*]] ]189; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[VAL_PHI]], 0190; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[CMP]]191; CHECK-NEXT: br i1 [[COND_FR]], label [[L1:%.*]], label [[TMP0:%.*]]192; CHECK: 0:193; CHECK-NEXT: [[TMP1:%.*]] = phi i8 [ [[VALUE:%.*]], [[L0]] ]194; CHECK-NEXT: switch i8 [[TMP1]], label [[L3:%.*]] [195; CHECK-NEXT: i8 1, label [[L1]]196; CHECK-NEXT: i8 2, label [[L2:%.*]]197; CHECK-NEXT: ]198; CHECK: L1:199; CHECK-NEXT: call void @foo()200; CHECK-NEXT: ret void201; CHECK: L2:202; CHECK-NEXT: call void @bar()203; CHECK-NEXT: ret void204; CHECK: L3:205; CHECK-NEXT: call void @baz()206; CHECK-NEXT: ret void207; CHECK: L0.thread:208; CHECK-NEXT: call void @quux()209; CHECK-NEXT: br label [[L1]]210;211entry:212 br i1 %cond, label %L0, label %L4213L0:214 %val.phi = phi i32 [%val, %entry], [-1, %L4]215 %cmp = icmp slt i32 %val.phi, 0216 %expr = select i1 %cmp, i8 1, i8 %value217 switch i8 %expr, label %L3 [i8 1, label %L1 i8 2, label %L2]218 219L1:220 call void @foo()221 ret void222L2:223 call void @bar()224 ret void225L3:226 call void @baz()227 ret void228L4:229 call void @quux()230 br label %L0231}232 233; Make sure the edge value of %0 from entry to L2 includes 0 and L3 is234; reachable.235define void @test_switch_default(ptr nocapture %status) nounwind {236; CHECK-LABEL: @test_switch_default(237; CHECK-NEXT: entry:238; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[STATUS:%.*]], align 4239; CHECK-NEXT: switch i32 [[TMP0]], label [[L2:%.*]] [240; CHECK-NEXT: i32 5061, label [[L2_THREAD:%.*]]241; CHECK-NEXT: i32 0, label [[L2]]242; CHECK-NEXT: ]243; CHECK: L2.thread:244; CHECK-NEXT: store i32 10025, ptr [[STATUS]], align 4245; CHECK-NEXT: br label [[L4:%.*]]246; CHECK: L2:247; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[ENTRY:%.*]] ], [ [[TMP0]], [[ENTRY]] ]248; CHECK-NEXT: [[CMP57_I:%.*]] = icmp eq i32 [[TMP1]], 0249; CHECK-NEXT: br i1 [[CMP57_I]], label [[L3:%.*]], label [[L4]]250; CHECK: L3:251; CHECK-NEXT: store i32 10000, ptr [[STATUS]], align 4252; CHECK-NEXT: br label [[L4]]253; CHECK: L4:254; CHECK-NEXT: ret void255;256entry:257 %0 = load i32, ptr %status, align 4258 switch i32 %0, label %L2 [259 i32 5061, label %L1260 i32 0, label %L2261 ]262 263L1:264 store i32 10025, ptr %status, align 4265 br label %L2266 267L2:268 %1 = load i32, ptr %status, align 4269 %cmp57.i = icmp eq i32 %1, 0270 br i1 %cmp57.i, label %L3, label %L4271 272L3:273 store i32 10000, ptr %status, align 4274 br label %L4275 276L4:277 ret void278}279 280define void @unfold1(double %x, double %y) nounwind !prof !1 {281; CHECK-LABEL: @unfold1(282; CHECK-NEXT: entry:283; CHECK-NEXT: [[SUB:%.*]] = fsub double [[X:%.*]], [[Y:%.*]]284; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt double [[SUB]], 1.000000e+01285; CHECK-NEXT: br i1 [[CMP]], label [[COND_END4:%.*]], label [[COND_FALSE:%.*]]286; CHECK: cond.false:287; CHECK-NEXT: [[ADD:%.*]] = fadd double [[X]], [[Y]]288; CHECK-NEXT: [[CMP1:%.*]] = fcmp ogt double [[ADD]], 1.000000e+01289; CHECK-NEXT: br i1 [[CMP1]], label [[COND_END4]], label [[IF_THEN:%.*]], !prof [[PROF1:![0-9]+]]290; CHECK: cond.end4:291; CHECK-NEXT: [[COND5:%.*]] = phi double [ [[SUB]], [[ENTRY:%.*]] ], [ [[ADD]], [[COND_FALSE]] ]292; CHECK-NEXT: [[CMP6:%.*]] = fcmp oeq double [[COND5]], 0.000000e+00293; CHECK-NEXT: br i1 [[CMP6]], label [[IF_THEN]], label [[IF_END:%.*]]294; CHECK: if.then:295; CHECK-NEXT: call void @foo()296; CHECK-NEXT: br label [[IF_END]]297; CHECK: if.end:298; CHECK-NEXT: ret void299;300entry:301 %sub = fsub double %x, %y302 %cmp = fcmp ogt double %sub, 1.000000e+01303 br i1 %cmp, label %cond.end4, label %cond.false304 305cond.false: ; preds = %entry306 %add = fadd double %x, %y307 %cmp1 = fcmp ogt double %add, 1.000000e+01308 %add. = select i1 %cmp1, double %add, double 0.000000e+00, !prof !0309 br label %cond.end4310 311cond.end4: ; preds = %entry, %cond.false312 %cond5 = phi double [ %add., %cond.false ], [ %sub, %entry ]313 %cmp6 = fcmp oeq double %cond5, 0.000000e+00314 br i1 %cmp6, label %if.then, label %if.end315 316if.then: ; preds = %cond.end4317 call void @foo()318 br label %if.end319 320if.end: ; preds = %if.then, %cond.end4321 ret void322 323}324 325 326define void @unfold2(i32 %x, i32 %y) nounwind !prof !1 {327; CHECK-LABEL: @unfold2(328; CHECK-NEXT: entry:329; CHECK-NEXT: [[SUB:%.*]] = sub nsw i32 [[X:%.*]], [[Y:%.*]]330; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[SUB]], 10331; CHECK-NEXT: br i1 [[CMP]], label [[IF_END:%.*]], label [[COND_FALSE:%.*]]332; CHECK: cond.false:333; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[X]], [[Y]]334; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[ADD]], 10335; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[COND_END4:%.*]], !prof [[PROF1]]336; CHECK: cond.end4:337; CHECK-NEXT: [[COND5:%.*]] = phi i32 [ [[ADD]], [[COND_FALSE]] ]338; CHECK-NEXT: [[CMP6:%.*]] = icmp eq i32 [[COND5]], 0339; CHECK-NEXT: br i1 [[CMP6]], label [[IF_THEN]], label [[IF_END]]340; CHECK: if.then:341; CHECK-NEXT: call void @foo()342; CHECK-NEXT: br label [[IF_END]]343; CHECK: if.end:344; CHECK-NEXT: ret void345;346entry:347 %sub = sub nsw i32 %x, %y348 %cmp = icmp sgt i32 %sub, 10349 br i1 %cmp, label %cond.end4, label %cond.false350 351cond.false: ; preds = %entry352 %add = add nsw i32 %x, %y353 %cmp1 = icmp sgt i32 %add, 10354 %add. = select i1 %cmp1, i32 0, i32 %add, !prof !0355 br label %cond.end4356 357cond.end4: ; preds = %entry, %cond.false358 %cond5 = phi i32 [ %add., %cond.false ], [ %sub, %entry ]359 %cmp6 = icmp eq i32 %cond5, 0360 br i1 %cmp6, label %if.then, label %if.end361 362if.then: ; preds = %cond.end4363 call void @foo()364 br label %if.end365 366if.end: ; preds = %if.then, %cond.end4367 ret void368 369}370 371 372define i32 @unfold3(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {373; CHECK-LABEL: @unfold3(374; CHECK-NEXT: entry:375; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[J:%.*]], 2376; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[U:%.*]], [[V:%.*]]377; CHECK-NEXT: br i1 [[CMP_I]], label [[DOTEXIT_THREAD4:%.*]], label [[COND_FALSE_I:%.*]]378; CHECK: cond.false.i:379; CHECK-NEXT: [[CMP4_I:%.*]] = icmp sgt i32 [[U]], [[V]]380; CHECK-NEXT: br i1 [[CMP4_I]], label [[DOTEXIT_THREAD:%.*]], label [[COND_FALSE_6_I:%.*]]381; CHECK: cond.false.6.i:382; CHECK-NEXT: [[CMP8_I:%.*]] = icmp slt i32 [[W:%.*]], [[X:%.*]]383; CHECK-NEXT: br i1 [[CMP8_I]], label [[DOTEXIT_THREAD4]], label [[COND_FALSE_10_I:%.*]]384; CHECK: cond.false.10.i:385; CHECK-NEXT: [[CMP13_I:%.*]] = icmp sgt i32 [[W]], [[X]]386; CHECK-NEXT: br i1 [[CMP13_I]], label [[DOTEXIT_THREAD]], label [[DOTEXIT:%.*]]387; CHECK: .exit:388; CHECK-NEXT: [[PHITMP:%.*]] = icmp sge i32 [[Y:%.*]], [[Z:%.*]]389; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[PHITMP]]390; CHECK-NEXT: br i1 [[COND_FR]], label [[DOTEXIT_THREAD]], label [[DOTEXIT_THREAD4]]391; CHECK: .exit.thread:392; CHECK-NEXT: br label [[DOTEXIT_THREAD4]]393; CHECK: .exit.thread4:394; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[J]], [[DOTEXIT_THREAD]] ], [ [[ADD3]], [[DOTEXIT]] ], [ [[ADD3]], [[ENTRY:%.*]] ], [ [[ADD3]], [[COND_FALSE_6_I]] ]395; CHECK-NEXT: ret i32 [[TMP0]]396;397entry:398 %add3 = add nsw i32 %j, 2399 %cmp.i = icmp slt i32 %u, %v400 br i1 %cmp.i, label %.exit, label %cond.false.i401 402cond.false.i: ; preds = %entry403 %cmp4.i = icmp sgt i32 %u, %v404 br i1 %cmp4.i, label %.exit, label %cond.false.6.i405 406cond.false.6.i: ; preds = %cond.false.i407 %cmp8.i = icmp slt i32 %w, %x408 br i1 %cmp8.i, label %.exit, label %cond.false.10.i409 410cond.false.10.i: ; preds = %cond.false.6.i411 %cmp13.i = icmp sgt i32 %w, %x412 br i1 %cmp13.i, label %.exit, label %cond.false.15.i413 414cond.false.15.i: ; preds = %cond.false.10.i415 %phitmp = icmp sge i32 %y, %z416 br label %.exit417 418.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i419 %cond23.i = phi i1 [ false, %entry ], [ true, %cond.false.i ], [ false, %cond.false.6.i ], [ %phitmp, %cond.false.15.i ], [ true, %cond.false.10.i ]420 %j.add3 = select i1 %cond23.i, i32 %j, i32 %add3421 ret i32 %j.add3422 423}424 425define i32 @unfold4(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {426; CHECK-LABEL: @unfold4(427; CHECK-NEXT: entry:428; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[J:%.*]], 2429; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[U:%.*]], [[V:%.*]]430; CHECK-NEXT: br i1 [[CMP_I]], label [[DOTEXIT_THREAD:%.*]], label [[COND_FALSE_I:%.*]]431; CHECK: cond.false.i:432; CHECK-NEXT: [[CMP4_I:%.*]] = icmp sgt i32 [[U]], [[V]]433; CHECK-NEXT: br i1 [[CMP4_I]], label [[DOTEXIT_THREAD5:%.*]], label [[COND_FALSE_6_I:%.*]]434; CHECK: cond.false.6.i:435; CHECK-NEXT: [[CMP8_I:%.*]] = icmp slt i32 [[W:%.*]], [[X:%.*]]436; CHECK-NEXT: br i1 [[CMP8_I]], label [[DOTEXIT_THREAD]], label [[COND_FALSE_10_I:%.*]]437; CHECK: cond.false.10.i:438; CHECK-NEXT: [[CMP13_I:%.*]] = icmp sgt i32 [[W]], [[X]]439; CHECK-NEXT: br i1 [[CMP13_I]], label [[DOTEXIT_THREAD5]], label [[DOTEXIT:%.*]]440; CHECK: .exit:441; CHECK-NEXT: [[CMP19_I:%.*]] = icmp sge i32 [[Y:%.*]], [[Z:%.*]]442; CHECK-NEXT: [[CONV:%.*]] = zext i1 [[CMP19_I]] to i32443; CHECK-NEXT: [[LNOT_I18:%.*]] = icmp eq i32 [[CONV]], 1444; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[LNOT_I18]]445; CHECK-NEXT: br i1 [[COND_FR]], label [[DOTEXIT_THREAD]], label [[DOTEXIT_THREAD5]]446; CHECK: .exit.thread:447; CHECK-NEXT: br label [[DOTEXIT_THREAD5]]448; CHECK: .exit.thread5:449; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[J]], [[DOTEXIT_THREAD]] ], [ [[ADD3]], [[DOTEXIT]] ], [ [[ADD3]], [[COND_FALSE_I]] ], [ [[ADD3]], [[COND_FALSE_10_I]] ]450; CHECK-NEXT: ret i32 [[TMP0]]451;452entry:453 %add3 = add nsw i32 %j, 2454 %cmp.i = icmp slt i32 %u, %v455 br i1 %cmp.i, label %.exit, label %cond.false.i456 457cond.false.i: ; preds = %entry458 %cmp4.i = icmp sgt i32 %u, %v459 br i1 %cmp4.i, label %.exit, label %cond.false.6.i460 461cond.false.6.i: ; preds = %cond.false.i462 %cmp8.i = icmp slt i32 %w, %x463 br i1 %cmp8.i, label %.exit, label %cond.false.10.i464 465cond.false.10.i: ; preds = %cond.false.6.i466 %cmp13.i = icmp sgt i32 %w, %x467 br i1 %cmp13.i, label %.exit, label %cond.false.15.i468 469cond.false.15.i: ; preds = %cond.false.10.i470 %cmp19.i = icmp sge i32 %y, %z471 %conv = zext i1 %cmp19.i to i32472 br label %.exit473 474.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i475 %cond23.i = phi i32 [ 1, %entry ], [ 0, %cond.false.i ], [ 1, %cond.false.6.i ], [ %conv, %cond.false.15.i ], [ 0, %cond.false.10.i ]476 %lnot.i18 = icmp eq i32 %cond23.i, 1477 %j.add3 = select i1 %lnot.i18, i32 %j, i32 %add3478 ret i32 %j.add3479 480}481 482define i32 @unfold5(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {483; CHECK-LABEL: @unfold5(484; CHECK-NEXT: entry:485; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[J:%.*]], 2486; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[U:%.*]], [[V:%.*]]487; CHECK-NEXT: br i1 [[CMP_I]], label [[DOTEXIT:%.*]], label [[COND_FALSE_I:%.*]]488; CHECK: cond.false.i:489; CHECK-NEXT: [[CMP4_I:%.*]] = icmp sgt i32 [[U]], [[V]]490; CHECK-NEXT: br i1 [[CMP4_I]], label [[DOTEXIT]], label [[COND_FALSE_6_I:%.*]]491; CHECK: cond.false.6.i:492; CHECK-NEXT: [[CMP8_I:%.*]] = icmp slt i32 [[W:%.*]], [[X:%.*]]493; CHECK-NEXT: br i1 [[CMP8_I]], label [[DOTEXIT]], label [[COND_FALSE_10_I:%.*]]494; CHECK: cond.false.10.i:495; CHECK-NEXT: [[CMP13_I:%.*]] = icmp sgt i32 [[W]], [[X]]496; CHECK-NEXT: br i1 [[CMP13_I]], label [[DOTEXIT]], label [[COND_FALSE_15_I:%.*]]497; CHECK: cond.false.15.i:498; CHECK-NEXT: [[CMP19_I:%.*]] = icmp sge i32 [[Y:%.*]], [[Z:%.*]]499; CHECK-NEXT: [[CONV:%.*]] = zext i1 [[CMP19_I]] to i32500; CHECK-NEXT: br label [[DOTEXIT]]501; CHECK: .exit:502; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[J]], [[COND_FALSE_10_I]] ], [ [[CONV]], [[COND_FALSE_15_I]] ], [ 1, [[COND_FALSE_6_I]] ], [ 3, [[COND_FALSE_I]] ], [ 2, [[ENTRY:%.*]] ]503; CHECK-NEXT: ret i32 [[TMP0]]504;505entry:506 %add3 = add nsw i32 %j, 2507 %cmp.i = icmp slt i32 %u, %v508 br i1 %cmp.i, label %.exit, label %cond.false.i509 510cond.false.i: ; preds = %entry511 %cmp4.i = icmp sgt i32 %u, %v512 br i1 %cmp4.i, label %.exit, label %cond.false.6.i513 514cond.false.6.i: ; preds = %cond.false.i515 %cmp8.i = icmp slt i32 %w, %x516 br i1 %cmp8.i, label %.exit, label %cond.false.10.i517 518cond.false.10.i: ; preds = %cond.false.6.i519 %cmp13.i = icmp sgt i32 %w, %x520 br i1 %cmp13.i, label %.exit, label %cond.false.15.i521 522cond.false.15.i: ; preds = %cond.false.10.i523 %cmp19.i = icmp sge i32 %y, %z524 %conv = zext i1 %cmp19.i to i32525 br label %.exit526 527.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i528 %cond23.i = phi i32 [ 2, %entry ], [ 3, %cond.false.i ], [ 1, %cond.false.6.i ], [ %conv, %cond.false.15.i ], [ 7, %cond.false.10.i ]529 %lnot.i18 = icmp sgt i32 %cond23.i, 5530 %j.add3 = select i1 %lnot.i18, i32 %j, i32 %cond23.i531 ret i32 %j.add3532 533}534 535; When a select has a constant operand in one branch, and it feeds a phi node536; and the phi node feeds a switch we unfold the select537define void @test_func(ptr nocapture readonly %a, ptr nocapture readonly %b, ptr nocapture readonly %c, i32 %n) local_unnamed_addr #0 {538; CHECK-LABEL: @test_func(539; CHECK-NEXT: entry:540; CHECK-NEXT: br label [[FOR_COND:%.*]]541; CHECK: for.cond:542; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[SW_DEFAULT:%.*]] ]543; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I_0]], [[N:%.*]]544; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]545; CHECK: for.cond.cleanup:546; CHECK-NEXT: ret void547; CHECK: for.body:548; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[I_0]] to i64549; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[TMP0]]550; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX]], align 4551; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[TMP1]], 4552; CHECK-NEXT: br i1 [[CMP1]], label [[LAND_LHS_TRUE:%.*]], label [[IF_END:%.*]]553; CHECK: land.lhs.true:554; CHECK-NEXT: [[ARRAYIDX3:%.*]] = getelementptr inbounds i32, ptr [[B:%.*]], i64 [[TMP0]]555; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[ARRAYIDX3]], align 4556; CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds i32, ptr [[C:%.*]], i64 [[TMP0]]557; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[ARRAYIDX5]], align 4558; CHECK-NEXT: [[CMP6:%.*]] = icmp eq i32 [[TMP2]], [[TMP3]]559; CHECK-NEXT: br i1 [[CMP6]], label [[SW_BB:%.*]], label [[SW_BB7:%.*]]560; CHECK: if.end:561; CHECK-NEXT: [[LOCAL_VAR_0:%.*]] = phi i32 [ [[TMP1]], [[FOR_BODY]] ]562; CHECK-NEXT: switch i32 [[LOCAL_VAR_0]], label [[SW_DEFAULT]] [563; CHECK-NEXT: i32 2, label [[SW_BB]]564; CHECK-NEXT: i32 4, label [[SW_BB7]]565; CHECK-NEXT: i32 5, label [[SW_BB8:%.*]]566; CHECK-NEXT: i32 7, label [[SW_BB9:%.*]]567; CHECK-NEXT: ]568; CHECK: sw.bb:569; CHECK-NEXT: call void @foo()570; CHECK-NEXT: br label [[SW_BB7]]571; CHECK: sw.bb7:572; CHECK-NEXT: call void @bar()573; CHECK-NEXT: br label [[SW_BB8]]574; CHECK: sw.bb8:575; CHECK-NEXT: call void @baz()576; CHECK-NEXT: br label [[SW_BB9]]577; CHECK: sw.bb9:578; CHECK-NEXT: call void @quux()579; CHECK-NEXT: br label [[SW_DEFAULT]]580; CHECK: sw.default:581; CHECK-NEXT: call void @baz()582; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_0]], 1583; CHECK-NEXT: br label [[FOR_COND]]584;585entry:586 br label %for.cond587 588for.cond: ; preds = %sw.default, %entry589 %i.0 = phi i32 [ 0, %entry ], [ %inc, %sw.default ]590 %cmp = icmp slt i32 %i.0, %n591 br i1 %cmp, label %for.body, label %for.cond.cleanup592 593for.cond.cleanup: ; preds = %for.cond594 ret void595 596for.body: ; preds = %for.cond597 %0 = zext i32 %i.0 to i64598 %arrayidx = getelementptr inbounds i32, ptr %a, i64 %0599 %1 = load i32, ptr %arrayidx, align 4600 %cmp1 = icmp eq i32 %1, 4601 br i1 %cmp1, label %land.lhs.true, label %if.end602 603land.lhs.true: ; preds = %for.body604 %arrayidx3 = getelementptr inbounds i32, ptr %b, i64 %0605 %2 = load i32, ptr %arrayidx3, align 4606 %arrayidx5 = getelementptr inbounds i32, ptr %c, i64 %0607 %3 = load i32, ptr %arrayidx5, align 4608 %cmp6 = icmp eq i32 %2, %3609 %spec.select = select i1 %cmp6, i32 2, i32 4610 br label %if.end611 612if.end: ; preds = %land.lhs.true, %for.body613 %local_var.0 = phi i32 [ %1, %for.body ], [ %spec.select, %land.lhs.true ]614 switch i32 %local_var.0, label %sw.default [615 i32 2, label %sw.bb616 i32 4, label %sw.bb7617 i32 5, label %sw.bb8618 i32 7, label %sw.bb9619 ]620 621sw.bb: ; preds = %if.end622 call void @foo()623 br label %sw.bb7624 625sw.bb7: ; preds = %if.end, %sw.bb626 call void @bar()627 br label %sw.bb8628 629sw.bb8: ; preds = %if.end, %sw.bb7630 call void @baz()631 br label %sw.bb9632 633sw.bb9: ; preds = %if.end, %sw.bb8634 call void @quux()635 br label %sw.default636 637sw.default: ; preds = %if.end, %sw.bb9638 call void @baz()639 %inc = add nuw nsw i32 %i.0, 1640 br label %for.cond641}642 643define i32 @TryToUnfoldSelectInCurrBB(i1 %b, i1 %ui, i32 %s, i1 %x) {644; CHECK-LABEL: @TryToUnfoldSelectInCurrBB(645; CHECK-NEXT: entry:646; CHECK-NEXT: br i1 [[B:%.*]], label [[IF_END_THREAD:%.*]], label [[IF_END:%.*]]647; CHECK: if.end:648; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[X:%.*]]649; CHECK-NEXT: br i1 [[COND_FR]], label [[TMP0:%.*]], label [[IF_END_THREAD]]650; CHECK: 0:651; CHECK-NEXT: br label [[IF_END_THREAD]]652; CHECK: if.end.thread:653; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[S:%.*]], [[TMP0]] ], [ 42, [[IF_END]] ], [ 42, [[ENTRY:%.*]] ]654; CHECK-NEXT: ret i32 [[TMP1]]655;656entry:657 br i1 %b, label %if.end, label %if.else658 659if.else:660 br label %if.end661 662if.end:663 %v = phi i1 [ %x, %if.else ], [ false, %entry ]664 %v1 = select i1 %v, i32 %s, i32 42665 ret i32 %v1666}667 668; branch_weights overflowing uint32_t669!0 = !{!"branch_weights", i64 1073741824, i64 3221225472}670!1 = !{!"function_entry_count", i64 1984}671;.672; CHECK: attributes #[[ATTR0:[0-9]+]] = { nounwind }673;.674; CHECK: [[META0:![0-9]+]] = !{!"function_entry_count", i64 1984}675; CHECK: [[PROF1]] = !{!"branch_weights", i64 1073741824, i64 3221225472}676;.677