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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals2; RUN: opt -passes=loop-idiom < %s -S | FileCheck %s3target datalayout = "e-p:64:64:64:32-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"4 5 6target triple = "x86_64-apple-darwin10.0.0"7 8;void test(int *f, unsigned n) {9; for (unsigned i = 0; i < 2 * n; i += 2) {10; f[i] = 0;11; f[i+1] = 0;12; }13;}14define void @test(ptr %f, i32 %n) nounwind ssp {15; CHECK-LABEL: @test(16; CHECK-NEXT: entry:17; CHECK-NEXT: [[TMP0:%.*]] = shl i32 [[N:%.*]], 118; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[TMP0]], 019; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]]20; CHECK: for.body.preheader:21; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[TMP0]], -122; CHECK-NEXT: [[TMP2:%.*]] = lshr i32 [[TMP1]], 123; CHECK-NEXT: [[TMP3:%.*]] = shl i32 [[TMP2]], 324; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[TMP3]], 825; CHECK-NEXT: call void @llvm.memset.p0.i32(ptr align 4 [[F:%.*]], i8 0, i32 [[TMP4]], i1 false)26; CHECK-NEXT: br label [[FOR_BODY:%.*]]27; CHECK: for.body:28; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i32 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]29; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[F]], i32 [[INDVARS_IV]]30; CHECK-NEXT: [[TMP5:%.*]] = or disjoint i32 [[INDVARS_IV]], 131; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[F]], i32 [[TMP5]]32; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i32 [[INDVARS_IV]], 233; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[INDVARS_IV_NEXT]], [[TMP0]]34; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]]35; CHECK: for.end.loopexit:36; CHECK-NEXT: br label [[FOR_END]]37; CHECK: for.end:38; CHECK-NEXT: ret void39;40entry:41 %0 = shl i32 %n, 142 %cmp1 = icmp eq i32 %0, 043 br i1 %cmp1, label %for.end, label %for.body.preheader44 45for.body.preheader: ; preds = %entry46 br label %for.body47 48for.body: ; preds = %for.body.preheader, %for.body49 %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]50 %arrayidx = getelementptr inbounds i32, ptr %f, i32 %indvars.iv51 store i32 0, ptr %arrayidx, align 452 %1 = or disjoint i32 %indvars.iv, 153 %arrayidx2 = getelementptr inbounds i32, ptr %f, i32 %154 store i32 0, ptr %arrayidx2, align 455 %indvars.iv.next = add nuw nsw i32 %indvars.iv, 256 %cmp = icmp ult i32 %indvars.iv.next, %057 br i1 %cmp, label %for.body, label %for.end.loopexit58 59for.end.loopexit: ; preds = %for.body60 br label %for.end61 62for.end: ; preds = %for.end.loopexit, %entry63 ret void64}65 66;void test_pattern(int *f, unsigned n) {67; for (unsigned i = 0; i < 2 * n; i += 2) {68; f[i] = 2;69; f[i+1] = 2;70; }71;}72define void @test_pattern(ptr %f, i32 %n) nounwind ssp {73; CHECK-LABEL: @test_pattern(74; CHECK-NEXT: entry:75; CHECK-NEXT: [[MUL:%.*]] = shl i32 [[N:%.*]], 176; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[MUL]], 077; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]]78; CHECK: for.body.preheader:79; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[MUL]], -180; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[TMP0]], 181; CHECK-NEXT: [[TMP2:%.*]] = add nuw i32 [[TMP1]], 182; CHECK-NEXT: [[TMP3:%.*]] = mul i32 [[TMP2]], 283; CHECK-NEXT: call void @llvm.experimental.memset.pattern.p0.i32.i32(ptr align 4 [[F:%.*]], i32 2, i32 [[TMP3]], i1 false)84; CHECK-NEXT: br label [[FOR_BODY:%.*]]85; CHECK: for.body:86; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i32 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]87; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[F]], i32 [[INDVARS_IV]]88; CHECK-NEXT: [[X1:%.*]] = or disjoint i32 [[INDVARS_IV]], 189; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[F]], i32 [[X1]]90; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i32 [[INDVARS_IV]], 291; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[INDVARS_IV_NEXT]], [[MUL]]92; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]]93; CHECK: for.end.loopexit:94; CHECK-NEXT: br label [[FOR_END]]95; CHECK: for.end:96; CHECK-NEXT: ret void97;98entry:99 %mul = shl i32 %n, 1100 %cmp1 = icmp eq i32 %mul, 0101 br i1 %cmp1, label %for.end, label %for.body.preheader102 103for.body.preheader: ; preds = %entry104 br label %for.body105 106for.body: ; preds = %for.body.preheader, %for.body107 %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]108 %arrayidx = getelementptr inbounds i32, ptr %f, i32 %indvars.iv109 store i32 2, ptr %arrayidx, align 4110 %x1 = or disjoint i32 %indvars.iv, 1111 %arrayidx2 = getelementptr inbounds i32, ptr %f, i32 %x1112 store i32 2, ptr %arrayidx2, align 4113 %indvars.iv.next = add nuw nsw i32 %indvars.iv, 2114 %cmp = icmp ult i32 %indvars.iv.next, %mul115 br i1 %cmp, label %for.body, label %for.end.loopexit116 117for.end.loopexit: ; preds = %for.body118 br label %for.end119 120for.end: ; preds = %for.end.loopexit, %entry121 ret void122}123;.124; CHECK: attributes #[[ATTR0:[0-9]+]] = { nounwind ssp }125; CHECK: attributes #[[ATTR1:[0-9]+]] = { nocallback nofree nounwind willreturn memory(argmem: write) }126;.127