1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -S -passes="separate-const-offset-from-gep<lower-gep>" < %s | FileCheck %s 3 4; Check that GEP with an index 'A - B + [ConstantInt]' will be split into two 5; GEPs. eg. 6; %A = ... 7; %B = ... 8; %sub = %A - %B 9; %idx = %sub + 10 10; %gep = getelementptr int, ptr %p, %idx 11; will be transformed into: 12; %A = ... 13; %B = ... 14; %sub = %A - %B 15; %gep_base = getelementptr int, ptr %p, %sub 16; %gep = getelementptr int, ptr %gep_base, 10 17 18define void @test_A_sub_B_add_ConstantInt(ptr %p) { 19; CHECK-LABEL: @test_A_sub_B_add_ConstantInt( 20; CHECK-NEXT: entry: 21; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @foo() 22; CHECK-NEXT: [[REM:%.*]] = srem i32 [[TMP0]], 5 23; CHECK-NEXT: br label [[FOR_BODY:%.*]] 24; CHECK: for.body: 25; CHECK-NEXT: [[K:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[COND_END:%.*]] ] 26; CHECK-NEXT: [[MUL:%.*]] = mul nuw nsw i32 [[K]], 5 27; CHECK-NEXT: [[SUB1:%.*]] = sub nsw i32 [[MUL]], [[REM]] 28; CHECK-NEXT: [[CMP26:%.*]] = icmp ult i32 [[SUB1]], 512 29; CHECK-NEXT: br i1 [[CMP26]], label [[COND_TRUE:%.*]], label [[COND_END]] 30; CHECK: cond.true: 31; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[MUL]] to i64 32; CHECK-NEXT: [[TMP2:%.*]] = sext i32 [[REM]] to i64 33; CHECK-NEXT: [[SUB22:%.*]] = sub i64 [[TMP2]], [[TMP1]] 34; CHECK-NEXT: [[TMP3:%.*]] = ptrtoint ptr [[P:%.*]] to i64 35; CHECK-NEXT: [[TMP4:%.*]] = shl i64 [[SUB22]], 2 36; CHECK-NEXT: [[TMP5:%.*]] = add i64 [[TMP3]], [[TMP4]] 37; CHECK-NEXT: [[TMP6:%.*]] = add i64 [[TMP5]], 2044 38; CHECK-NEXT: [[TMP7:%.*]] = inttoptr i64 [[TMP6]] to ptr 39; CHECK-NEXT: store float 1.000000e+00, ptr [[TMP7]], align 4 40; CHECK-NEXT: br label [[COND_END]] 41; CHECK: cond.end: 42; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[K]], 1 43; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i32 [[INC]], 100 44; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END:%.*]] 45; CHECK: for.end: 46; CHECK-NEXT: ret void 47; 48entry: 49 %0 = tail call i32 @foo() 50 %rem = srem i32 %0, 5 51 %add = add nsw i32 %rem , 511 52 br label %for.body 53 54for.body: 55 %k = phi i32 [ 0, %entry ], [ %inc, %cond.end ] 56 %mul = mul nuw nsw i32 %k, 5 57 %sub1 = sub nsw i32 %mul, %rem 58 %cmp26 = icmp ult i32 %sub1, 512 59 br i1 %cmp26, label %cond.true, label %cond.end 60 61cond.true: 62 %sub2 = sub nsw i32 %add, %mul 63 %idxprom = sext i32 %sub2 to i64 64 %arryidx = getelementptr inbounds float, ptr %p, i64 %idxprom 65 store float 1.0, ptr %arryidx, align 4 66 br label %cond.end 67 68cond.end: 69 %inc = add nuw nsw i32 %k, 1 70 %exitcond = icmp ne i32 %inc, 100 71 br i1 %exitcond, label %for.body, label %for.end 72 73for.end: 74 ret void 75} 76 77declare i32 @foo() 78