| ; NOTE: Assertions have been autogenerated by update_test_checks.py |
| ; RUN: opt < %s -passes=instsimplify -S | FileCheck %s |
| 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" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define i64 @ptrdiff1(ptr %ptr) { |
| ; CHECK-LABEL: @ptrdiff1( |
| ; CHECK: ret i64 42 |
| ; |
| %last = getelementptr inbounds i8, ptr %ptr, i32 42 |
| %first.int = ptrtoint ptr %ptr to i64 |
| %last.int = ptrtoint ptr %last to i64 |
| %diff = sub i64 %last.int, %first.int |
| ret i64 %diff |
| } |
| |
| define i64 @ptrdiff2(ptr %ptr) { |
| ; CHECK-LABEL: @ptrdiff2( |
| ; CHECK: ret i64 42 |
| ; |
| %first2 = getelementptr inbounds i8, ptr %ptr, i32 1 |
| %first3 = getelementptr inbounds i8, ptr %first2, i32 2 |
| %first4 = getelementptr inbounds i8, ptr %first3, i32 4 |
| %last1 = getelementptr inbounds i8, ptr %first2, i32 48 |
| %last2 = getelementptr inbounds i8, ptr %last1, i32 8 |
| %last3 = getelementptr inbounds i8, ptr %last2, i32 -4 |
| %last4 = getelementptr inbounds i8, ptr %last3, i32 -4 |
| %first.int = ptrtoint ptr %first4 to i64 |
| %last.int = ptrtoint ptr %last4 to i64 |
| %diff = sub i64 %last.int, %first.int |
| ret i64 %diff |
| } |
| |
| define i64 @ptrdiff3(ptr %ptr) { |
| ; Don't bother with non-inbounds GEPs. |
| ; CHECK-LABEL: @ptrdiff3( |
| ; CHECK: [[LAST:%.*]] = getelementptr i8, ptr %ptr, i32 42 |
| ; CHECK-NEXT: [[FIRST_INT:%.*]] = ptrtoint ptr %ptr to i64 |
| ; CHECK-NEXT: [[LAST_INT:%.*]] = ptrtoint ptr [[LAST]] to i64 |
| ; CHECK-NEXT: [[DIFF:%.*]] = sub i64 [[LAST_INT]], [[FIRST_INT]] |
| ; CHECK-NEXT: ret i64 [[DIFF]] |
| ; |
| %last = getelementptr i8, ptr %ptr, i32 42 |
| %first.int = ptrtoint ptr %ptr to i64 |
| %last.int = ptrtoint ptr %last to i64 |
| %diff = sub i64 %last.int, %first.int |
| ret i64 %diff |
| } |
| |
| define <4 x i32> @ptrdiff4(<4 x ptr> %arg) nounwind { |
| ; Handle simple cases of vectors of pointers. |
| ; CHECK-LABEL: @ptrdiff4( |
| ; CHECK: ret <4 x i32> zeroinitializer |
| ; |
| %p1 = ptrtoint <4 x ptr> %arg to <4 x i32> |
| %bc = bitcast <4 x ptr> %arg to <4 x ptr> |
| %p2 = ptrtoint <4 x ptr> %bc to <4 x i32> |
| %sub = sub <4 x i32> %p1, %p2 |
| ret <4 x i32> %sub |
| } |
| |
| %struct.ham = type { i32, [2 x [2 x i32]] } |
| |
| @global = internal global %struct.ham zeroinitializer, align 4 |
| |
| define i32 @ptrdiff5() nounwind { |
| ; CHECK-LABEL: @ptrdiff5( |
| ; CHECK: bb: |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| bb: |
| %tmp = getelementptr inbounds %struct.ham, ptr @global, i32 0, i32 1 |
| %tmp3 = ptrtoint ptr %tmp to i32 |
| %tmp4 = getelementptr inbounds %struct.ham, ptr @global, i32 0, i32 1 |
| %tmp6 = ptrtoint ptr %tmp4 to i32 |
| %tmp7 = sub i32 %tmp3, %tmp6 |
| ret i32 %tmp7 |
| } |