1 ; NOTE: Assertions have been autogenerated by update_test_checks.py 2 ; RUN: opt < %s -instsimplify -S | FileCheck %s 3 target 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" 4 target triple = "x86_64-unknown-linux-gnu" 5 6 define 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 18 define 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 36 define 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 53 define <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 69 define i32 @ptrdiff5() nounwind { 70 ; CHECK-LABEL: @ptrdiff5( 71 ; CHECK: bb: 72 ; CHECK-NEXT: ret i32 0 73 ; 74 bb: 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
