[llvm] 2aeae16 - Revert "[NFC][SCEV] Improve tests for ptrtoint modelling (D88806)"

Roman Lebedev via llvm-commits llvm-commits at lists.llvm.org
Fri Oct 9 04:11:47 PDT 2020


Author: Roman Lebedev
Date: 2020-10-09T14:10:43+03:00
New Revision: 2aeae1617cbe0969630a804945551022f8f63a26

URL: https://github.com/llvm/llvm-project/commit/2aeae1617cbe0969630a804945551022f8f63a26
DIFF: https://github.com/llvm/llvm-project/commit/2aeae1617cbe0969630a804945551022f8f63a26.diff

LOG: Revert "[NFC][SCEV] Improve tests for ptrtoint modelling (D88806)"

Buildbots aren't happy, need to investigate.
This reverts commit 32cc8f7998abe1824e0832a49b66559471c9b879.

Added: 
    llvm/test/Analysis/ScalarEvolution/semi-transparent-inttoptr-ptrtoint-casts.ll

Modified: 
    

Removed: 
    llvm/test/Analysis/ScalarEvolution/ptrtoint.ll


################################################################################
diff  --git a/llvm/test/Analysis/ScalarEvolution/ptrtoint.ll b/llvm/test/Analysis/ScalarEvolution/ptrtoint.ll
deleted file mode 100644
index c7b7a7df0f51..000000000000
--- a/llvm/test/Analysis/ScalarEvolution/ptrtoint.ll
+++ /dev/null
@@ -1,239 +0,0 @@
-; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
-; RUN: opt < %s --data-layout="e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" -S -analyze -enable-new-pm=0 -scalar-evolution | FileCheck --check-prefixes=ALL,X64 %s
-; RUN: opt < %s--data-layout="e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" -S -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck --check-prefixes=ALL,X64 %s
-; RUN: opt < %s --data-layout="e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-f64:32:64-f80:32-n8:16:32-S128" -S -analyze -enable-new-pm=0 -scalar-evolution | FileCheck --check-prefixes=ALL,X32 %s
-; RUN: opt < %s--data-layout="e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-f64:32:64-f80:32-n8:16:32-S128" -S -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck --check-prefixes=ALL,X32 %s
-
-; While we can't treat inttoptr/ptrtoint casts as fully transparent,
-; for ptrtoint cast, instead of modelling it as fully opaque (unknown),
-; we can at least model it as zext/trunc/self of an unknown,
-; iff it it's argument would be modelled as unknown anyways.
-
-declare void @useptr(i8*)
-
-; Simple ptrtoint of an argument, with casts to potentially 
diff erent bit widths.
-define void @ptrtoint(i8* %in, i64* %out0, i32* %out1, i16* %out2, i128* %out3) {
-; X64-LABEL: 'ptrtoint'
-; X64-NEXT:  Classifying expressions for: @ptrtoint
-; X64-NEXT:    %p0 = ptrtoint i8* %in to i64
-; X64-NEXT:    --> %p0 U: full-set S: full-set
-; X64-NEXT:    %p1 = ptrtoint i8* %in to i32
-; X64-NEXT:    --> %p1 U: full-set S: full-set
-; X64-NEXT:    %p2 = ptrtoint i8* %in to i16
-; X64-NEXT:    --> %p2 U: full-set S: full-set
-; X64-NEXT:    %p3 = ptrtoint i8* %in to i128
-; X64-NEXT:    --> %p3 U: [0,18446744073709551616) S: [-18446744073709551616,18446744073709551616)
-; X64-NEXT:  Determining loop execution counts for: @ptrtoint
-;
-; X32-LABEL: 'ptrtoint'
-; X32-NEXT:  Classifying expressions for: @ptrtoint
-; X32-NEXT:    %p0 = ptrtoint i8* %in to i64
-; X32-NEXT:    --> %p0 U: [0,4294967296) S: [-4294967296,4294967296)
-; X32-NEXT:    %p1 = ptrtoint i8* %in to i32
-; X32-NEXT:    --> %p1 U: full-set S: full-set
-; X32-NEXT:    %p2 = ptrtoint i8* %in to i16
-; X32-NEXT:    --> %p2 U: full-set S: full-set
-; X32-NEXT:    %p3 = ptrtoint i8* %in to i128
-; X32-NEXT:    --> %p3 U: [0,4294967296) S: [-4294967296,4294967296)
-; X32-NEXT:  Determining loop execution counts for: @ptrtoint
-;
-  %p0 = ptrtoint i8* %in to i64
-  %p1 = ptrtoint i8* %in to i32
-  %p2 = ptrtoint i8* %in to i16
-  %p3 = ptrtoint i8* %in to i128
-  store i64  %p0, i64*  %out0
-  store i32  %p1, i32*  %out1
-  store i16  %p2, i16*  %out2
-  store i128 %p3, i128* %out3
-  ret void
-}
-
-; Same, but from non-zero/non-default address space.
-define void @ptrtoint_as1(i8 addrspace(1)* %in, i64* %out0, i32* %out1, i16* %out2, i128* %out3) {
-; X64-LABEL: 'ptrtoint_as1'
-; X64-NEXT:  Classifying expressions for: @ptrtoint_as1
-; X64-NEXT:    %p0 = ptrtoint i8 addrspace(1)* %in to i64
-; X64-NEXT:    --> %p0 U: full-set S: full-set
-; X64-NEXT:    %p1 = ptrtoint i8 addrspace(1)* %in to i32
-; X64-NEXT:    --> %p1 U: full-set S: full-set
-; X64-NEXT:    %p2 = ptrtoint i8 addrspace(1)* %in to i16
-; X64-NEXT:    --> %p2 U: full-set S: full-set
-; X64-NEXT:    %p3 = ptrtoint i8 addrspace(1)* %in to i128
-; X64-NEXT:    --> %p3 U: [0,18446744073709551616) S: [-18446744073709551616,18446744073709551616)
-; X64-NEXT:  Determining loop execution counts for: @ptrtoint_as1
-;
-; X32-LABEL: 'ptrtoint_as1'
-; X32-NEXT:  Classifying expressions for: @ptrtoint_as1
-; X32-NEXT:    %p0 = ptrtoint i8 addrspace(1)* %in to i64
-; X32-NEXT:    --> %p0 U: [0,4294967296) S: [-4294967296,4294967296)
-; X32-NEXT:    %p1 = ptrtoint i8 addrspace(1)* %in to i32
-; X32-NEXT:    --> %p1 U: full-set S: full-set
-; X32-NEXT:    %p2 = ptrtoint i8 addrspace(1)* %in to i16
-; X32-NEXT:    --> %p2 U: full-set S: full-set
-; X32-NEXT:    %p3 = ptrtoint i8 addrspace(1)* %in to i128
-; X32-NEXT:    --> %p3 U: [0,4294967296) S: [-4294967296,4294967296)
-; X32-NEXT:  Determining loop execution counts for: @ptrtoint_as1
-;
-  %p0 = ptrtoint i8 addrspace(1)* %in to i64
-  %p1 = ptrtoint i8 addrspace(1)* %in to i32
-  %p2 = ptrtoint i8 addrspace(1)* %in to i16
-  %p3 = ptrtoint i8 addrspace(1)* %in to i128
-  store i64  %p0, i64*  %out0
-  store i32  %p1, i32*  %out1
-  store i16  %p2, i16*  %out2
-  store i128 %p3, i128* %out3
-  ret void
-}
-
-; Likewise, ptrtoint of a bitcast is fine, we simply skip it.
-define void @ptrtoint_of_bitcast(i8* %in, i64* %out0) {
-; X64-LABEL: 'ptrtoint_of_bitcast'
-; X64-NEXT:  Classifying expressions for: @ptrtoint_of_bitcast
-; X64-NEXT:    %in_casted = bitcast i8* %in to float*
-; X64-NEXT:    --> %in U: full-set S: full-set
-; X64-NEXT:    %p0 = ptrtoint float* %in_casted to i64
-; X64-NEXT:    --> %p0 U: full-set S: full-set
-; X64-NEXT:  Determining loop execution counts for: @ptrtoint_of_bitcast
-;
-; X32-LABEL: 'ptrtoint_of_bitcast'
-; X32-NEXT:  Classifying expressions for: @ptrtoint_of_bitcast
-; X32-NEXT:    %in_casted = bitcast i8* %in to float*
-; X32-NEXT:    --> %in U: full-set S: full-set
-; X32-NEXT:    %p0 = ptrtoint float* %in_casted to i64
-; X32-NEXT:    --> %p0 U: [0,4294967296) S: [-4294967296,4294967296)
-; X32-NEXT:  Determining loop execution counts for: @ptrtoint_of_bitcast
-;
-  %in_casted = bitcast i8* %in to float*
-  %p0 = ptrtoint float* %in_casted to i64
-  store i64 %p0, i64* %out0
-  ret void
-}
-
-; addrspacecast is fine too, but We don't model addrspacecast, so we stop there.
-define void @ptrtoint_of_addrspacecast(i8* %in, i64* %out0) {
-; X64-LABEL: 'ptrtoint_of_addrspacecast'
-; X64-NEXT:  Classifying expressions for: @ptrtoint_of_addrspacecast
-; X64-NEXT:    %in_casted = addrspacecast i8* %in to i8 addrspace(1)*
-; X64-NEXT:    --> %in_casted U: full-set S: full-set
-; X64-NEXT:    %p0 = ptrtoint i8 addrspace(1)* %in_casted to i64
-; X64-NEXT:    --> %p0 U: full-set S: full-set
-; X64-NEXT:  Determining loop execution counts for: @ptrtoint_of_addrspacecast
-;
-; X32-LABEL: 'ptrtoint_of_addrspacecast'
-; X32-NEXT:  Classifying expressions for: @ptrtoint_of_addrspacecast
-; X32-NEXT:    %in_casted = addrspacecast i8* %in to i8 addrspace(1)*
-; X32-NEXT:    --> %in_casted U: full-set S: full-set
-; X32-NEXT:    %p0 = ptrtoint i8 addrspace(1)* %in_casted to i64
-; X32-NEXT:    --> %p0 U: [0,4294967296) S: [-4294967296,4294967296)
-; X32-NEXT:  Determining loop execution counts for: @ptrtoint_of_addrspacecast
-;
-  %in_casted = addrspacecast i8* %in to i8 addrspace(1)*
-  %p0 = ptrtoint i8 addrspace(1)* %in_casted to i64
-  store i64 %p0, i64* %out0
-  ret void
-}
-
-; inttoptr is fine too, but we don't (and can't) model inttoptr, so we stop there.
-define void @ptrtoint_of_inttoptr(i64 %in, i64* %out0) {
-; X64-LABEL: 'ptrtoint_of_inttoptr'
-; X64-NEXT:  Classifying expressions for: @ptrtoint_of_inttoptr
-; X64-NEXT:    %in_casted = inttoptr i64 %in to i8*
-; X64-NEXT:    --> %in_casted U: full-set S: full-set
-; X64-NEXT:    %p0 = ptrtoint i8* %in_casted to i64
-; X64-NEXT:    --> %p0 U: full-set S: full-set
-; X64-NEXT:  Determining loop execution counts for: @ptrtoint_of_inttoptr
-;
-; X32-LABEL: 'ptrtoint_of_inttoptr'
-; X32-NEXT:  Classifying expressions for: @ptrtoint_of_inttoptr
-; X32-NEXT:    %in_casted = inttoptr i64 %in to i8*
-; X32-NEXT:    --> %in_casted U: full-set S: full-set
-; X32-NEXT:    %p0 = ptrtoint i8* %in_casted to i64
-; X32-NEXT:    --> %p0 U: [0,4294967296) S: [-4294967296,4294967296)
-; X32-NEXT:  Determining loop execution counts for: @ptrtoint_of_inttoptr
-;
-  %in_casted = inttoptr i64 %in to i8*
-  %p0 = ptrtoint i8* %in_casted to i64
-  store i64 %p0, i64* %out0
-  ret void
-}
-
-; However, GEP is something SCEV knows how to model, so in this case ptrtoint
-; can't be modelled as a cast, only as an unknown.
-define void @ptrtoint_of_gep(i8* %in, i64* %out0) {
-; X64-LABEL: 'ptrtoint_of_gep'
-; X64-NEXT:  Classifying expressions for: @ptrtoint_of_gep
-; X64-NEXT:    %in_adj = getelementptr inbounds i8, i8* %in, i64 42
-; X64-NEXT:    --> (42 + %in)<nsw> U: [-9223372036854775766,-9223372036854775808) S: [-9223372036854775766,-9223372036854775808)
-; X64-NEXT:    %p0 = ptrtoint i8* %in_adj to i64
-; X64-NEXT:    --> %p0 U: full-set S: full-set
-; X64-NEXT:  Determining loop execution counts for: @ptrtoint_of_gep
-;
-; X32-LABEL: 'ptrtoint_of_gep'
-; X32-NEXT:  Classifying expressions for: @ptrtoint_of_gep
-; X32-NEXT:    %in_adj = getelementptr inbounds i8, i8* %in, i64 42
-; X32-NEXT:    --> (42 + %in)<nsw> U: [-2147483606,-2147483648) S: [-2147483606,-2147483648)
-; X32-NEXT:    %p0 = ptrtoint i8* %in_adj to i64
-; X32-NEXT:    --> %p0 U: [0,4294967296) S: [-4294967296,4294967296)
-; X32-NEXT:  Determining loop execution counts for: @ptrtoint_of_gep
-;
-  %in_adj = getelementptr inbounds i8, i8* %in, i64 42
-  %p0 = ptrtoint i8* %in_adj to i64
-  store i64  %p0, i64*  %out0
-  ret void
-}
-
-; A constant pointer is fine
-define void @ptrtoint_of_nullptr(i64* %out0) {
-; ALL-LABEL: 'ptrtoint_of_nullptr'
-; ALL-NEXT:  Classifying expressions for: @ptrtoint_of_nullptr
-; ALL-NEXT:    %p0 = ptrtoint i8* null to i64
-; ALL-NEXT:    --> %p0 U: [0,1) S: [-1,1)
-; ALL-NEXT:  Determining loop execution counts for: @ptrtoint_of_nullptr
-;
-  %p0 = ptrtoint i8* null to i64
-  store i64 %p0, i64* %out0
-  ret void
-}
-
-; A constant inttoptr argument of an ptrtoint is still bad.
-define void @ptrtoint_of_constantexpr_inttoptr(i64* %out0) {
-; ALL-LABEL: 'ptrtoint_of_constantexpr_inttoptr'
-; ALL-NEXT:  Classifying expressions for: @ptrtoint_of_constantexpr_inttoptr
-; ALL-NEXT:    %p0 = ptrtoint i8* inttoptr (i64 42 to i8*) to i64
-; ALL-NEXT:    --> %p0 U: [42,43) S: [-64,64)
-; ALL-NEXT:  Determining loop execution counts for: @ptrtoint_of_constantexpr_inttoptr
-;
-  %p0 = ptrtoint i8* inttoptr (i64 42 to i8*) to i64
-  store i64 %p0, i64* %out0
-  ret void
-}
-
-; However, while bitcast would be fine, GEP we can model, so we are back
-; to modelling the whole cast as unknown..
-define void @ptrtoint_of_bitcast_of_gep(i8* %in, i64* %out0) {
-; X64-LABEL: 'ptrtoint_of_bitcast_of_gep'
-; X64-NEXT:  Classifying expressions for: @ptrtoint_of_bitcast_of_gep
-; X64-NEXT:    %in_adj = getelementptr inbounds i8, i8* %in, i64 42
-; X64-NEXT:    --> (42 + %in)<nsw> U: [-9223372036854775766,-9223372036854775808) S: [-9223372036854775766,-9223372036854775808)
-; X64-NEXT:    %in_adj_casted = bitcast i8* %in_adj to float*
-; X64-NEXT:    --> (42 + %in)<nsw> U: [-9223372036854775766,-9223372036854775808) S: [-9223372036854775766,-9223372036854775808)
-; X64-NEXT:    %p0 = ptrtoint float* %in_adj_casted to i64
-; X64-NEXT:    --> %p0 U: full-set S: full-set
-; X64-NEXT:  Determining loop execution counts for: @ptrtoint_of_bitcast_of_gep
-;
-; X32-LABEL: 'ptrtoint_of_bitcast_of_gep'
-; X32-NEXT:  Classifying expressions for: @ptrtoint_of_bitcast_of_gep
-; X32-NEXT:    %in_adj = getelementptr inbounds i8, i8* %in, i64 42
-; X32-NEXT:    --> (42 + %in)<nsw> U: [-2147483606,-2147483648) S: [-2147483606,-2147483648)
-; X32-NEXT:    %in_adj_casted = bitcast i8* %in_adj to float*
-; X32-NEXT:    --> (42 + %in)<nsw> U: [-2147483606,-2147483648) S: [-2147483606,-2147483648)
-; X32-NEXT:    %p0 = ptrtoint float* %in_adj_casted to i64
-; X32-NEXT:    --> %p0 U: [0,4294967296) S: [-4294967296,4294967296)
-; X32-NEXT:  Determining loop execution counts for: @ptrtoint_of_bitcast_of_gep
-;
-  %in_adj = getelementptr inbounds i8, i8* %in, i64 42
-  %in_adj_casted = bitcast i8* %in_adj to float*
-  %p0 = ptrtoint float* %in_adj_casted to i64
-  store i64 %p0, i64* %out0
-  ret void
-}

diff  --git a/llvm/test/Analysis/ScalarEvolution/semi-transparent-inttoptr-ptrtoint-casts.ll b/llvm/test/Analysis/ScalarEvolution/semi-transparent-inttoptr-ptrtoint-casts.ll
new file mode 100644
index 000000000000..d9fdfa03d7a7
--- /dev/null
+++ b/llvm/test/Analysis/ScalarEvolution/semi-transparent-inttoptr-ptrtoint-casts.ll
@@ -0,0 +1,115 @@
+; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
+; RUN: opt < %s -S -analyze -enable-new-pm=0 -scalar-evolution | FileCheck %s
+; RUN: opt < %s -S -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck %s
+
+; While we can't treat inttoptr/ptrtoint casts as fully transparent,
+; instead of modelling them as fully opaque (unknown), we can at least model
+; their source values are opaque (unknown). Which, given e.g.:
+;   %x = ???
+;   %y = inttoptr %x
+;   %z = inttoptr %x
+; at least allows us to tell that %y and %z are identical.
+; Note that we must stop at that, we can not further analyze %x itself.
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+
+define dso_local void @ptrtoint(i8* %in, i64* %out0, i64* %out1, i32* %out2, i128* %out3) {
+; CHECK-LABEL: 'ptrtoint'
+; CHECK-NEXT:  Classifying expressions for: @ptrtoint
+; CHECK-NEXT:    %in_adj = getelementptr inbounds i8, i8* %in, i64 42
+; CHECK-NEXT:    --> (42 + %in)<nsw> U: [-9223372036854775766,-9223372036854775808) S: [-9223372036854775766,-9223372036854775808)
+; CHECK-NEXT:    %p0 = ptrtoint i8* %in_adj to i64
+; CHECK-NEXT:    --> %p0 U: full-set S: full-set
+; CHECK-NEXT:    %p1 = ptrtoint i8* %in_adj to i64
+; CHECK-NEXT:    --> %p1 U: full-set S: full-set
+; CHECK-NEXT:    %p2 = ptrtoint i8* %in_adj to i32
+; CHECK-NEXT:    --> %p2 U: full-set S: full-set
+; CHECK-NEXT:    %p3 = ptrtoint i8* %in_adj to i128
+; CHECK-NEXT:    --> %p3 U: [0,18446744073709551616) S: [-18446744073709551616,18446744073709551616)
+; CHECK-NEXT:  Determining loop execution counts for: @ptrtoint
+;
+  %in_adj = getelementptr inbounds i8, i8* %in, i64 42
+  %p0 = ptrtoint i8* %in_adj to i64
+  %p1 = ptrtoint i8* %in_adj to i64
+  %p2 = ptrtoint i8* %in_adj to i32
+  %p3 = ptrtoint i8* %in_adj to i128
+  store i64  %p0, i64* %out0
+  store i64  %p1, i64* %out1
+  store i32  %p2, i32* %out2
+  store i128 %p3, i128* %out3
+  ret void
+}
+
+define dso_local void @inttoptr(i64 %in0, i8** %out0, i8** %out1) {
+; CHECK-LABEL: 'inttoptr'
+; CHECK-NEXT:  Classifying expressions for: @inttoptr
+; CHECK-NEXT:    %in_adj = add i64 %in0, 42
+; CHECK-NEXT:    --> (42 + %in0) U: full-set S: full-set
+; CHECK-NEXT:    %i0 = inttoptr i64 %in_adj to i8*
+; CHECK-NEXT:    --> %i0 U: full-set S: full-set
+; CHECK-NEXT:    %i1 = inttoptr i64 %in_adj to i8*
+; CHECK-NEXT:    --> %i1 U: full-set S: full-set
+; CHECK-NEXT:  Determining loop execution counts for: @inttoptr
+;
+  %in_adj = add i64 %in0, 42
+  %i0 = inttoptr i64 %in_adj to i8*
+  %i1 = inttoptr i64 %in_adj to i8*
+  store i8* %i0, i8** %out0
+  store i8* %i1, i8** %out1
+  ret void
+}
+define dso_local void @inttoptr_widening(i32 %in1, i8** %out2) {
+; CHECK-LABEL: 'inttoptr_widening'
+; CHECK-NEXT:  Classifying expressions for: @inttoptr_widening
+; CHECK-NEXT:    %in_adj = add i32 %in1, 42
+; CHECK-NEXT:    --> (42 + %in1) U: full-set S: full-set
+; CHECK-NEXT:    %i0 = inttoptr i32 %in_adj to i8*
+; CHECK-NEXT:    --> %i0 U: [0,4294967296) S: [-4294967296,4294967296)
+; CHECK-NEXT:  Determining loop execution counts for: @inttoptr_widening
+;
+  %in_adj = add i32 %in1, 42
+  %i0 = inttoptr i32 %in_adj to i8*
+  store i8* %i0, i8** %out2
+  ret void
+}
+define dso_local void @inttoptr_narrowing(i128 %in2, i8** %out3) {
+; CHECK-LABEL: 'inttoptr_narrowing'
+; CHECK-NEXT:  Classifying expressions for: @inttoptr_narrowing
+; CHECK-NEXT:    %in_adj = add i128 %in2, 42
+; CHECK-NEXT:    --> (42 + %in2) U: full-set S: full-set
+; CHECK-NEXT:    %i0 = inttoptr i128 %in_adj to i8*
+; CHECK-NEXT:    --> %i0 U: full-set S: full-set
+; CHECK-NEXT:  Determining loop execution counts for: @inttoptr_narrowing
+;
+  %in_adj = add i128 %in2, 42
+  %i0 = inttoptr i128 %in_adj to i8*
+  store i8* %i0, i8** %out3
+  ret void
+}
+
+; Note that we never try to analyze the value of the ptrtoint/inttoptr!
+define i8* @onlysemitransparency(i8* %in) {
+; CHECK-LABEL: 'onlysemitransparency'
+; CHECK-NEXT:  Classifying expressions for: @onlysemitransparency
+; CHECK-NEXT:    %i0 = ptrtoint i8* %in to i64
+; CHECK-NEXT:    --> %i0 U: full-set S: full-set
+; CHECK-NEXT:    %i1 = inttoptr i64 %i0 to i8*
+; CHECK-NEXT:    --> %i1 U: full-set S: full-set
+; CHECK-NEXT:    %i2 = ptrtoint i8* %i1 to i64
+; CHECK-NEXT:    --> %i2 U: full-set S: full-set
+; CHECK-NEXT:    %i3 = inttoptr i64 %i2 to i8*
+; CHECK-NEXT:    --> %i3 U: full-set S: full-set
+; CHECK-NEXT:    %i4 = ptrtoint i8* %i3 to i64
+; CHECK-NEXT:    --> %i4 U: full-set S: full-set
+; CHECK-NEXT:    %i5 = inttoptr i64 %i4 to i8*
+; CHECK-NEXT:    --> %i5 U: full-set S: full-set
+; CHECK-NEXT:  Determining loop execution counts for: @onlysemitransparency
+;
+  %i0 = ptrtoint i8* %in to i64
+  %i1 = inttoptr i64 %i0 to i8*
+  %i2 = ptrtoint i8* %i1 to i64
+  %i3 = inttoptr i64 %i2 to i8*
+  %i4 = ptrtoint i8* %i3 to i64
+  %i5 = inttoptr i64 %i4 to i8*
+  ret i8* %i5
+}


        


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