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[SROA] Add support for non-integral pointers
Summary: C.f. http://llvm.org/docs/LangRef.html#non-integral-pointer-type Reviewers: chandlerc, loladiro Reviewed By: loladiro Subscribers: reames, loladiro, mcrosier, llvm-commits Differential Revision: https://reviews.llvm.org/D32203 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305639 91177308-0d34-0410-b5e6-96231b3b80d8
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; RUN: opt -sroa -S < %s | FileCheck %s | ||
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; This test checks that SROA does not introduce ptrtoint and inttoptr | ||
; casts from and to non-integral pointers. The "ni:4" bit in the | ||
; datalayout states that pointers of address space 4 are to be | ||
; considered "non-integral". | ||
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:4" | ||
target triple = "x86_64-unknown-linux-gnu" | ||
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define void @f0(i1 %alwaysFalse, i64 %val) { | ||
; CHECK-LABEL: @f0( | ||
; CHECK-NOT: inttoptr | ||
; CHECK-NOT: ptrtoint | ||
entry: | ||
%loc = alloca i64 | ||
store i64 %val, i64* %loc | ||
br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken | ||
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neverTaken: | ||
%loc.bc = bitcast i64* %loc to i8 addrspace(4)** | ||
%ptr = load i8 addrspace(4)*, i8 addrspace(4)** %loc.bc | ||
store i8 5, i8 addrspace(4)* %ptr | ||
ret void | ||
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alwaysTaken: | ||
ret void | ||
} | ||
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define i64 @f1(i1 %alwaysFalse, i8 addrspace(4)* %val) { | ||
; CHECK-LABEL: @f1( | ||
; CHECK-NOT: inttoptr | ||
; CHECK-NOT: ptrtoint | ||
entry: | ||
%loc = alloca i8 addrspace(4)* | ||
store i8 addrspace(4)* %val, i8 addrspace(4)** %loc | ||
br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken | ||
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neverTaken: | ||
%loc.bc = bitcast i8 addrspace(4)** %loc to i64* | ||
%int = load i64, i64* %loc.bc | ||
ret i64 %int | ||
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alwaysTaken: | ||
ret i64 42 | ||
} |