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