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Teach loop-idiom about address space pointer sizes

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190491 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault
2013-09-11 05:09:42 +00:00
parent f834dce7c7
commit 11250c1194
6 changed files with 381 additions and 12 deletions
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test/Transforms/IndVarSimplify/lftr-address-space-pointers.ll
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; RUN: opt -S -indvars -o - %s | FileCheck %s
target datalayout = "e-p:32:32:32-p1:64:64:64-p2:8:8:8-p3:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:32-n8:16:32:64"
; Derived from ptriv in lftr-reuse.ll
define void @ptriv_as2(i8 addrspace(2)* %base, i32 %n) nounwind {
; CHECK-LABEL: @ptriv_as2(
entry:
%idx.trunc = trunc i32 %n to i8
%add.ptr = getelementptr inbounds i8 addrspace(2)* %base, i8 %idx.trunc
%cmp1 = icmp ult i8 addrspace(2)* %base, %add.ptr
br i1 %cmp1, label %for.body, label %for.end
; Make sure the added GEP has the right index type
; CHECK: %lftr.limit = getelementptr i8 addrspace(2)* %base, i8 %0
; CHECK: for.body:
; CHECK: phi i8 addrspace(2)*
; CHECK-NOT: phi
; CHECK-NOT: add{{^rspace}}
; CHECK: icmp ne i8 addrspace(2)*
; CHECK: br i1
for.body:
%p.02 = phi i8 addrspace(2)* [ %base, %entry ], [ %incdec.ptr, %for.body ]
; cruft to make the IV useful
%sub.ptr.lhs.cast = ptrtoint i8 addrspace(2)* %p.02 to i8
%sub.ptr.rhs.cast = ptrtoint i8 addrspace(2)* %base to i8
%sub.ptr.sub = sub i8 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
store i8 %sub.ptr.sub, i8 addrspace(2)* %p.02
%incdec.ptr = getelementptr inbounds i8 addrspace(2)* %p.02, i32 1
%cmp = icmp ult i8 addrspace(2)* %incdec.ptr, %add.ptr
br i1 %cmp, label %for.body, label %for.end
for.end:
ret void
}
define void @ptriv_as3(i8 addrspace(3)* %base, i32 %n) nounwind {
; CHECK-LABEL: @ptriv_as3(
entry:
%idx.trunc = trunc i32 %n to i16
%add.ptr = getelementptr inbounds i8 addrspace(3)* %base, i16 %idx.trunc
%cmp1 = icmp ult i8 addrspace(3)* %base, %add.ptr
br i1 %cmp1, label %for.body, label %for.end
; Make sure the added GEP has the right index type
; CHECK: %lftr.limit = getelementptr i8 addrspace(3)* %base, i16 %0
; CHECK: for.body:
; CHECK: phi i8 addrspace(3)*
; CHECK-NOT: phi
; CHECK-NOT: add{{^rspace}}
; CHECK: icmp ne i8 addrspace(3)*
; CHECK: br i1
for.body:
%p.02 = phi i8 addrspace(3)* [ %base, %entry ], [ %incdec.ptr, %for.body ]
; cruft to make the IV useful
%sub.ptr.lhs.cast = ptrtoint i8 addrspace(3)* %p.02 to i16
%sub.ptr.rhs.cast = ptrtoint i8 addrspace(3)* %base to i16
%sub.ptr.sub = sub i16 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
%conv = trunc i16 %sub.ptr.sub to i8
store i8 %conv, i8 addrspace(3)* %p.02
%incdec.ptr = getelementptr inbounds i8 addrspace(3)* %p.02, i32 1
%cmp = icmp ult i8 addrspace(3)* %incdec.ptr, %add.ptr
br i1 %cmp, label %for.body, label %for.end
for.end:
ret void
}