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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -S < %s -passes=loop-unroll -unroll-count=4 | FileCheck %s3;4; This is a test case that required a number of setup passes because5; it depends on block order.6 7target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"8target triple = "x86_64-apple-macosx10.6.8"9 10declare i1 @check() nounwind11declare i32 @getval() nounwind12 13; Check that the loop exit merges values from all the iterations. This14; could be a tad fragile, but it's a good test.15;16define i32 @foo() {17;18; CHECK-LABEL: @foo(19; CHECK-NEXT: if.end:20; CHECK-NEXT: [[CALL2:%.*]] = call i32 @getval()21; CHECK-NEXT: br label [[LAND_LHS_TRUE_I:%.*]]22; CHECK: land.lhs.true.i:23; CHECK-NEXT: [[CMP4_I:%.*]] = call zeroext i1 @check()24; CHECK-NEXT: br i1 [[CMP4_I]], label [[BAR_EXIT:%.*]], label [[DO_COND:%.*]]25; CHECK: bar.exit:26; CHECK-NEXT: [[TMP7_I:%.*]] = call i32 @getval()27; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i32 [[TMP7_I]], 028; CHECK-NEXT: br i1 [[CMP_NOT]], label [[DO_COND]], label [[LAND_LHS_TRUE:%.*]]29; CHECK: land.lhs.true:30; CHECK-NEXT: [[CALL10:%.*]] = call i32 @getval()31; CHECK-NEXT: [[CMP11:%.*]] = icmp eq i32 [[CALL10]], 032; CHECK-NEXT: br i1 [[CMP11]], label [[RETURN:%.*]], label [[DO_COND]]33; CHECK: do.cond:34; CHECK-NEXT: [[CMP18:%.*]] = icmp sgt i32 [[CALL2]], -135; CHECK-NEXT: br i1 [[CMP18]], label [[LAND_LHS_TRUE_I_1:%.*]], label [[RETURN]]36; CHECK: land.lhs.true.i.1:37; CHECK-NEXT: [[CMP4_I_1:%.*]] = call zeroext i1 @check()38; CHECK-NEXT: br i1 [[CMP4_I_1]], label [[BAR_EXIT_1:%.*]], label [[DO_COND_1:%.*]]39; CHECK: bar.exit.1:40; CHECK-NEXT: [[TMP7_I_1:%.*]] = call i32 @getval()41; CHECK-NEXT: [[CMP_NOT_1:%.*]] = icmp eq i32 [[TMP7_I_1]], 042; CHECK-NEXT: br i1 [[CMP_NOT_1]], label [[DO_COND_1]], label [[LAND_LHS_TRUE_1:%.*]]43; CHECK: land.lhs.true.1:44; CHECK-NEXT: [[CALL10_1:%.*]] = call i32 @getval()45; CHECK-NEXT: [[CMP11_1:%.*]] = icmp eq i32 [[CALL10_1]], 046; CHECK-NEXT: br i1 [[CMP11_1]], label [[RETURN]], label [[DO_COND_1]]47; CHECK: do.cond.1:48; CHECK-NEXT: [[CMP18_1:%.*]] = icmp sgt i32 [[CALL2]], -149; CHECK-NEXT: br i1 [[CMP18_1]], label [[LAND_LHS_TRUE_I_2:%.*]], label [[RETURN]]50; CHECK: land.lhs.true.i.2:51; CHECK-NEXT: [[CMP4_I_2:%.*]] = call zeroext i1 @check()52; CHECK-NEXT: br i1 [[CMP4_I_2]], label [[BAR_EXIT_2:%.*]], label [[DO_COND_2:%.*]]53; CHECK: bar.exit.2:54; CHECK-NEXT: [[TMP7_I_2:%.*]] = call i32 @getval()55; CHECK-NEXT: [[CMP_NOT_2:%.*]] = icmp eq i32 [[TMP7_I_2]], 056; CHECK-NEXT: br i1 [[CMP_NOT_2]], label [[DO_COND_2]], label [[LAND_LHS_TRUE_2:%.*]]57; CHECK: land.lhs.true.2:58; CHECK-NEXT: [[CALL10_2:%.*]] = call i32 @getval()59; CHECK-NEXT: [[CMP11_2:%.*]] = icmp eq i32 [[CALL10_2]], 060; CHECK-NEXT: br i1 [[CMP11_2]], label [[RETURN]], label [[DO_COND_2]]61; CHECK: do.cond.2:62; CHECK-NEXT: [[CMP18_2:%.*]] = icmp sgt i32 [[CALL2]], -163; CHECK-NEXT: br i1 [[CMP18_2]], label [[LAND_LHS_TRUE_I_3:%.*]], label [[RETURN]]64; CHECK: land.lhs.true.i.3:65; CHECK-NEXT: [[CMP4_I_3:%.*]] = call zeroext i1 @check()66; CHECK-NEXT: br i1 [[CMP4_I_3]], label [[BAR_EXIT_3:%.*]], label [[DO_COND_3:%.*]]67; CHECK: bar.exit.3:68; CHECK-NEXT: [[TMP7_I_3:%.*]] = call i32 @getval()69; CHECK-NEXT: [[CMP_NOT_3:%.*]] = icmp eq i32 [[TMP7_I_3]], 070; CHECK-NEXT: br i1 [[CMP_NOT_3]], label [[DO_COND_3]], label [[LAND_LHS_TRUE_3:%.*]]71; CHECK: land.lhs.true.3:72; CHECK-NEXT: [[CALL10_3:%.*]] = call i32 @getval()73; CHECK-NEXT: [[CMP11_3:%.*]] = icmp eq i32 [[CALL10_3]], 074; CHECK-NEXT: br i1 [[CMP11_3]], label [[RETURN]], label [[DO_COND_3]]75; CHECK: do.cond.3:76; CHECK-NEXT: [[CMP18_3:%.*]] = icmp sgt i32 [[CALL2]], -177; CHECK-NEXT: br i1 [[CMP18_3]], label [[LAND_LHS_TRUE_I]], label [[RETURN]], !llvm.loop [[LOOP0:![0-9]+]]78; CHECK: return:79; CHECK-NEXT: [[RETVAL_0:%.*]] = phi i32 [ [[TMP7_I]], [[LAND_LHS_TRUE]] ], [ 0, [[DO_COND]] ], [ [[TMP7_I_1]], [[LAND_LHS_TRUE_1]] ], [ 0, [[DO_COND_1]] ], [ [[TMP7_I_2]], [[LAND_LHS_TRUE_2]] ], [ 0, [[DO_COND_2]] ], [ [[TMP7_I_3]], [[LAND_LHS_TRUE_3]] ], [ 0, [[DO_COND_3]] ]80; CHECK-NEXT: ret i32 [[RETVAL_0]]81;82if.end:83 %call2 = call i32 @getval()84 br label %land.lhs.true.i85 86land.lhs.true.i: ; preds = %if.end, %do.cond87 %cmp4.i = call zeroext i1 @check() #088 br i1 %cmp4.i, label %bar.exit, label %do.cond89 90bar.exit: ; preds = %land.lhs.true.i91 %tmp7.i = call i32 @getval() #092 %cmp.not = icmp eq i32 %tmp7.i, 093 br i1 %cmp.not, label %do.cond, label %land.lhs.true94 95land.lhs.true: ; preds = %bar.exit96 %call10 = call i32 @getval()97 %cmp11 = icmp eq i32 %call10, 098 br i1 %cmp11, label %return, label %do.cond99 100do.cond: ; preds = %land.lhs.true.i, %land.lhs.true, %bar.exit101 %cmp18 = icmp sgt i32 %call2, -1102 br i1 %cmp18, label %land.lhs.true.i, label %return103 104return: ; preds = %do.cond, %land.lhs.true105 %retval.0 = phi i32 [ %tmp7.i, %land.lhs.true ], [ 0, %do.cond ]106 ret i32 %retval.0107}108