1; NOTE: Assertions have been autogenerated by update_test_checks.py 2; RUN: opt < %s -instsimplify -S | FileCheck %s 3target 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-S128" 4target triple = "x86_64-unknown-linux-gnu" 5 6define i64 @ptrdiff1(i8* %ptr) { 7; CHECK-LABEL: @ptrdiff1( 8; CHECK: ret i64 42 9; 10 %first = getelementptr inbounds i8, i8* %ptr, i32 0 11 %last = getelementptr inbounds i8, i8* %ptr, i32 42 12 %first.int = ptrtoint i8* %first to i64 13 %last.int = ptrtoint i8* %last to i64 14 %diff = sub i64 %last.int, %first.int 15 ret i64 %diff 16} 17 18define i64 @ptrdiff2(i8* %ptr) { 19; CHECK-LABEL: @ptrdiff2( 20; CHECK: ret i64 42 21; 22 %first1 = getelementptr inbounds i8, i8* %ptr, i32 0 23 %first2 = getelementptr inbounds i8, i8* %first1, i32 1 24 %first3 = getelementptr inbounds i8, i8* %first2, i32 2 25 %first4 = getelementptr inbounds i8, i8* %first3, i32 4 26 %last1 = getelementptr inbounds i8, i8* %first2, i32 48 27 %last2 = getelementptr inbounds i8, i8* %last1, i32 8 28 %last3 = getelementptr inbounds i8, i8* %last2, i32 -4 29 %last4 = getelementptr inbounds i8, i8* %last3, i32 -4 30 %first.int = ptrtoint i8* %first4 to i64 31 %last.int = ptrtoint i8* %last4 to i64 32 %diff = sub i64 %last.int, %first.int 33 ret i64 %diff 34} 35 36define i64 @ptrdiff3(i8* %ptr) { 37; Don't bother with non-inbounds GEPs. 38; CHECK-LABEL: @ptrdiff3( 39; CHECK: [[LAST:%.*]] = getelementptr i8, i8* %ptr, i32 42 40; CHECK-NEXT: [[FIRST_INT:%.*]] = ptrtoint i8* %ptr to i64 41; CHECK-NEXT: [[LAST_INT:%.*]] = ptrtoint i8* [[LAST]] to i64 42; CHECK-NEXT: [[DIFF:%.*]] = sub i64 [[LAST_INT]], [[FIRST_INT]] 43; CHECK-NEXT: ret i64 [[DIFF]] 44; 45 %first = getelementptr i8, i8* %ptr, i32 0 46 %last = getelementptr i8, i8* %ptr, i32 42 47 %first.int = ptrtoint i8* %first to i64 48 %last.int = ptrtoint i8* %last to i64 49 %diff = sub i64 %last.int, %first.int 50 ret i64 %diff 51} 52 53define <4 x i32> @ptrdiff4(<4 x i8*> %arg) nounwind { 54; Handle simple cases of vectors of pointers. 55; CHECK-LABEL: @ptrdiff4( 56; CHECK: ret <4 x i32> zeroinitializer 57; 58 %p1 = ptrtoint <4 x i8*> %arg to <4 x i32> 59 %bc = bitcast <4 x i8*> %arg to <4 x i32*> 60 %p2 = ptrtoint <4 x i32*> %bc to <4 x i32> 61 %sub = sub <4 x i32> %p1, %p2 62 ret <4 x i32> %sub 63} 64 65%struct.ham = type { i32, [2 x [2 x i32]] } 66 67@global = internal global %struct.ham zeroinitializer, align 4 68 69define i32 @ptrdiff5() nounwind { 70; CHECK-LABEL: @ptrdiff5( 71; CHECK: bb: 72; CHECK-NEXT: ret i32 0 73; 74bb: 75 %tmp = getelementptr inbounds %struct.ham, %struct.ham* @global, i32 0, i32 1 76 %tmp1 = getelementptr inbounds [2 x [2 x i32]], [2 x [2 x i32]]* %tmp, i32 0, i32 0 77 %tmp2 = bitcast [2 x i32]* %tmp1 to i32* 78 %tmp3 = ptrtoint i32* %tmp2 to i32 79 %tmp4 = getelementptr inbounds %struct.ham, %struct.ham* @global, i32 0, i32 1 80 %tmp5 = getelementptr inbounds [2 x [2 x i32]], [2 x [2 x i32]]* %tmp4, i32 0, i32 0 81 %tmp6 = ptrtoint [2 x i32]* %tmp5 to i32 82 %tmp7 = sub i32 %tmp3, %tmp6 83 ret i32 %tmp7 84} 85