mirror of
https://github.com/RPCS3/llvm-mirror.git
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f59acc15ad
Summary: This is a resurrection of work first proposed and discussed in Aug 2015: http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html and initially landed (but then backed out) in Nov 2015: http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html The @llvm.memcpy/memmove/memset intrinsics currently have an explicit argument which is required to be a constant integer. It represents the alignment of the dest (and source), and so must be the minimum of the actual alignment of the two. This change is the first in a series that allows source and dest to each have their own alignments by using the alignment attribute on their arguments. In this change we: 1) Remove the alignment argument. 2) Add alignment attributes to the source & dest arguments. We, temporarily, require that the alignments for source & dest be equal. For example, code which used to read: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 100, i32 4, i1 false) will now read call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 100, i1 false) Downstream users may have to update their lit tests that check for @llvm.memcpy/memmove/memset call/declaration patterns. The following extended sed script may help with updating the majority of your tests, but it does not catch all possible patterns so some manual checking and updating will be required. s~declare void @llvm\.mem(set|cpy|move)\.p([^(]*)\((.*), i32, i1\)~declare void @llvm.mem\1.p\2(\3, i1)~g s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* \3, i8 \4, i8 \5, i1 \6)~g s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* \3, i8 \4, i16 \5, i1 \6)~g s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* \3, i8 \4, i32 \5, i1 \6)~g s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* \3, i8 \4, i64 \5, i1 \6)~g s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* \3, i8 \4, i128 \5, i1 \6)~g s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* align \6 \3, i8 \4, i8 \5, i1 \7)~g s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* align \6 \3, i8 \4, i16 \5, i1 \7)~g s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* align \6 \3, i8 \4, i32 \5, i1 \7)~g s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* align \6 \3, i8 \4, i64 \5, i1 \7)~g s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* align \6 \3, i8 \4, i128 \5, i1 \7)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* \4, i8\5* \6, i8 \7, i1 \8)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* \4, i8\5* \6, i16 \7, i1 \8)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* \4, i8\5* \6, i32 \7, i1 \8)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* \4, i8\5* \6, i64 \7, i1 \8)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* \4, i8\5* \6, i128 \7, i1 \8)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* align \8 \4, i8\5* align \8 \6, i8 \7, i1 \9)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* align \8 \4, i8\5* align \8 \6, i16 \7, i1 \9)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* align \8 \4, i8\5* align \8 \6, i32 \7, i1 \9)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* align \8 \4, i8\5* align \8 \6, i64 \7, i1 \9)~g s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* align \8 \4, i8\5* align \8 \6, i128 \7, i1 \9)~g The remaining changes in the series will: Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing source and dest alignments. Step 3) Update Clang to use the new IRBuilder API. Step 4) Update Polly to use the new IRBuilder API. Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API, and those that use use MemIntrinsicInst::[get|set]Alignment() to use getDestAlignment() and getSourceAlignment() instead. Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the MemIntrinsicInst::[get|set]Alignment() methods. Reviewers: pete, hfinkel, lhames, reames, bollu Reviewed By: reames Subscribers: niosHD, reames, jholewinski, qcolombet, jfb, sanjoy, arsenm, dschuff, dylanmckay, mehdi_amini, sdardis, nemanjai, david2050, nhaehnle, javed.absar, sbc100, jgravelle-google, eraman, aheejin, kbarton, JDevlieghere, asb, rbar, johnrusso, simoncook, jordy.potman.lists, apazos, sabuasal, llvm-commits Differential Revision: https://reviews.llvm.org/D41675 llvm-svn: 322965
235 lines
8.1 KiB
LLVM
235 lines
8.1 KiB
LLVM
; RUN: opt < %s -analyze -scalar-evolution -S | FileCheck %s
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; Indvars should be able to find the trip count for the bb6 loop
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; without using a maximum calculation (icmp, select) because it should
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; be able to prove that the comparison is guarded by an appropriate
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; conditional branch. Unfortunately, indvars is not yet able to find
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; the comparison for the other two loops in this testcase.
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;
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; CHECK: Loop %bb6: backedge-taken count is (-1 + %w)
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin9"
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define void @foo(i8* %r, i32 %s, i32 %w, i32 %x, i8* %j, i32 %d) nounwind {
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entry:
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%0 = mul i32 %x, %w ; <i32> [#uses=2]
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%1 = mul i32 %x, %w ; <i32> [#uses=1]
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%2 = sdiv i32 %1, 4 ; <i32> [#uses=1]
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%.sum2 = add i32 %2, %0 ; <i32> [#uses=2]
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%cond = icmp eq i32 %d, 1 ; <i1> [#uses=1]
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br i1 %cond, label %bb29, label %bb10.preheader
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bb10.preheader: ; preds = %entry
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%3 = icmp sgt i32 %x, 0 ; <i1> [#uses=1]
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br i1 %3, label %bb.nph9, label %bb18.loopexit
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bb.nph7: ; preds = %bb7.preheader
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%4 = mul i32 %y.08, %w ; <i32> [#uses=1]
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%5 = mul i32 %y.08, %s ; <i32> [#uses=1]
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%6 = add i32 %5, 1 ; <i32> [#uses=1]
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br label %bb6
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bb6: ; preds = %bb7, %bb.nph7
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%x.06 = phi i32 [ %13, %bb7 ], [ 0, %bb.nph7 ] ; <i32> [#uses=3]
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%7 = add i32 %x.06, %4 ; <i32> [#uses=1]
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%8 = shl i32 %x.06, 1 ; <i32> [#uses=1]
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%9 = add i32 %6, %8 ; <i32> [#uses=1]
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%10 = getelementptr i8, i8* %r, i32 %9 ; <i8*> [#uses=1]
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%11 = load i8, i8* %10, align 1 ; <i8> [#uses=1]
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%12 = getelementptr i8, i8* %j, i32 %7 ; <i8*> [#uses=1]
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store i8 %11, i8* %12, align 1
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%13 = add i32 %x.06, 1 ; <i32> [#uses=2]
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br label %bb7
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bb7: ; preds = %bb6
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%14 = icmp slt i32 %13, %w ; <i1> [#uses=1]
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br i1 %14, label %bb6, label %bb7.bb9_crit_edge
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bb7.bb9_crit_edge: ; preds = %bb7
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br label %bb9
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bb9: ; preds = %bb7.preheader, %bb7.bb9_crit_edge
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%15 = add i32 %y.08, 1 ; <i32> [#uses=2]
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br label %bb10
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bb10: ; preds = %bb9
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%16 = icmp slt i32 %15, %x ; <i1> [#uses=1]
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br i1 %16, label %bb7.preheader, label %bb10.bb18.loopexit_crit_edge
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bb10.bb18.loopexit_crit_edge: ; preds = %bb10
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br label %bb10.bb18.loopexit_crit_edge.split
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bb10.bb18.loopexit_crit_edge.split: ; preds = %bb.nph9, %bb10.bb18.loopexit_crit_edge
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br label %bb18.loopexit
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bb.nph9: ; preds = %bb10.preheader
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%17 = icmp sgt i32 %w, 0 ; <i1> [#uses=1]
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br i1 %17, label %bb.nph9.split, label %bb10.bb18.loopexit_crit_edge.split
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bb.nph9.split: ; preds = %bb.nph9
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br label %bb7.preheader
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bb7.preheader: ; preds = %bb.nph9.split, %bb10
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%y.08 = phi i32 [ %15, %bb10 ], [ 0, %bb.nph9.split ] ; <i32> [#uses=3]
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br i1 true, label %bb.nph7, label %bb9
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bb.nph5: ; preds = %bb18.loopexit
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%18 = sdiv i32 %w, 2 ; <i32> [#uses=1]
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%19 = icmp slt i32 %w, 2 ; <i1> [#uses=1]
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%20 = sdiv i32 %x, 2 ; <i32> [#uses=1]
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br i1 %19, label %bb18.bb20_crit_edge.split, label %bb.nph5.split
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bb.nph5.split: ; preds = %bb.nph5
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br label %bb13
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bb13: ; preds = %bb18, %bb.nph5.split
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%y.14 = phi i32 [ %42, %bb18 ], [ 0, %bb.nph5.split ] ; <i32> [#uses=4]
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%21 = mul i32 %18, %y.14 ; <i32> [#uses=2]
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%22 = shl i32 %y.14, 1 ; <i32> [#uses=1]
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%23 = srem i32 %y.14, 2 ; <i32> [#uses=1]
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%24 = add i32 %23, %22 ; <i32> [#uses=1]
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%25 = mul i32 %24, %s ; <i32> [#uses=2]
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br i1 true, label %bb.nph3, label %bb17
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bb.nph3: ; preds = %bb13
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%26 = add i32 %21, %0 ; <i32> [#uses=1]
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%27 = add i32 %21, %.sum2 ; <i32> [#uses=1]
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%28 = sdiv i32 %w, 2 ; <i32> [#uses=1]
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br label %bb14
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bb14: ; preds = %bb15, %bb.nph3
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%x.12 = phi i32 [ %40, %bb15 ], [ 0, %bb.nph3 ] ; <i32> [#uses=5]
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%29 = shl i32 %x.12, 2 ; <i32> [#uses=1]
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%30 = add i32 %29, %25 ; <i32> [#uses=1]
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%31 = getelementptr i8, i8* %r, i32 %30 ; <i8*> [#uses=1]
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%32 = load i8, i8* %31, align 1 ; <i8> [#uses=1]
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%.sum = add i32 %26, %x.12 ; <i32> [#uses=1]
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%33 = getelementptr i8, i8* %j, i32 %.sum ; <i8*> [#uses=1]
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store i8 %32, i8* %33, align 1
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%34 = shl i32 %x.12, 2 ; <i32> [#uses=1]
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%35 = or i32 %34, 2 ; <i32> [#uses=1]
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%36 = add i32 %35, %25 ; <i32> [#uses=1]
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%37 = getelementptr i8, i8* %r, i32 %36 ; <i8*> [#uses=1]
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%38 = load i8, i8* %37, align 1 ; <i8> [#uses=1]
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%.sum6 = add i32 %27, %x.12 ; <i32> [#uses=1]
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%39 = getelementptr i8, i8* %j, i32 %.sum6 ; <i8*> [#uses=1]
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store i8 %38, i8* %39, align 1
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%40 = add i32 %x.12, 1 ; <i32> [#uses=2]
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br label %bb15
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bb15: ; preds = %bb14
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%41 = icmp sgt i32 %28, %40 ; <i1> [#uses=1]
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br i1 %41, label %bb14, label %bb15.bb17_crit_edge
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bb15.bb17_crit_edge: ; preds = %bb15
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br label %bb17
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bb17: ; preds = %bb15.bb17_crit_edge, %bb13
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%42 = add i32 %y.14, 1 ; <i32> [#uses=2]
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br label %bb18
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bb18.loopexit: ; preds = %bb10.bb18.loopexit_crit_edge.split, %bb10.preheader
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%43 = icmp slt i32 %x, 2 ; <i1> [#uses=1]
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br i1 %43, label %bb20, label %bb.nph5
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bb18: ; preds = %bb17
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%44 = icmp sgt i32 %20, %42 ; <i1> [#uses=1]
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br i1 %44, label %bb13, label %bb18.bb20_crit_edge
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bb18.bb20_crit_edge: ; preds = %bb18
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br label %bb18.bb20_crit_edge.split
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bb18.bb20_crit_edge.split: ; preds = %bb18.bb20_crit_edge, %bb.nph5
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br label %bb20
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bb20: ; preds = %bb18.bb20_crit_edge.split, %bb18.loopexit
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switch i32 %d, label %return [
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i32 3, label %bb22
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i32 1, label %bb29
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]
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bb22: ; preds = %bb20
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%45 = mul i32 %x, %w ; <i32> [#uses=1]
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%46 = sdiv i32 %45, 4 ; <i32> [#uses=1]
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%.sum3 = add i32 %46, %.sum2 ; <i32> [#uses=2]
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%47 = add i32 %x, 15 ; <i32> [#uses=1]
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%48 = and i32 %47, -16 ; <i32> [#uses=1]
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%49 = add i32 %w, 15 ; <i32> [#uses=1]
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%50 = and i32 %49, -16 ; <i32> [#uses=1]
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%51 = mul i32 %48, %s ; <i32> [#uses=1]
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%52 = icmp sgt i32 %x, 0 ; <i1> [#uses=1]
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br i1 %52, label %bb.nph, label %bb26
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bb.nph: ; preds = %bb22
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br label %bb23
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bb23: ; preds = %bb24, %bb.nph
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%y.21 = phi i32 [ %57, %bb24 ], [ 0, %bb.nph ] ; <i32> [#uses=3]
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%53 = mul i32 %y.21, %50 ; <i32> [#uses=1]
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%.sum1 = add i32 %53, %51 ; <i32> [#uses=1]
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%54 = getelementptr i8, i8* %r, i32 %.sum1 ; <i8*> [#uses=1]
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%55 = mul i32 %y.21, %w ; <i32> [#uses=1]
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%.sum5 = add i32 %55, %.sum3 ; <i32> [#uses=1]
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%56 = getelementptr i8, i8* %j, i32 %.sum5 ; <i8*> [#uses=1]
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tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %56, i8* %54, i32 %w, i1 false)
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%57 = add i32 %y.21, 1 ; <i32> [#uses=2]
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br label %bb24
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bb24: ; preds = %bb23
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%58 = icmp slt i32 %57, %x ; <i1> [#uses=1]
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br i1 %58, label %bb23, label %bb24.bb26_crit_edge
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bb24.bb26_crit_edge: ; preds = %bb24
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br label %bb26
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bb26: ; preds = %bb24.bb26_crit_edge, %bb22
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%59 = mul i32 %x, %w ; <i32> [#uses=1]
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%.sum4 = add i32 %.sum3, %59 ; <i32> [#uses=1]
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%60 = getelementptr i8, i8* %j, i32 %.sum4 ; <i8*> [#uses=1]
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%61 = mul i32 %x, %w ; <i32> [#uses=1]
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%62 = sdiv i32 %61, 2 ; <i32> [#uses=1]
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tail call void @llvm.memset.p0i8.i32(i8* %60, i8 -128, i32 %62, i1 false)
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ret void
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bb29: ; preds = %bb20, %entry
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%63 = add i32 %w, 15 ; <i32> [#uses=1]
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%64 = and i32 %63, -16 ; <i32> [#uses=1]
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%65 = icmp sgt i32 %x, 0 ; <i1> [#uses=1]
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br i1 %65, label %bb.nph11, label %bb33
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bb.nph11: ; preds = %bb29
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br label %bb30
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bb30: ; preds = %bb31, %bb.nph11
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%y.310 = phi i32 [ %70, %bb31 ], [ 0, %bb.nph11 ] ; <i32> [#uses=3]
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%66 = mul i32 %y.310, %64 ; <i32> [#uses=1]
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%67 = getelementptr i8, i8* %r, i32 %66 ; <i8*> [#uses=1]
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%68 = mul i32 %y.310, %w ; <i32> [#uses=1]
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%69 = getelementptr i8, i8* %j, i32 %68 ; <i8*> [#uses=1]
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tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %69, i8* %67, i32 %w, i1 false)
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%70 = add i32 %y.310, 1 ; <i32> [#uses=2]
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br label %bb31
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bb31: ; preds = %bb30
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%71 = icmp slt i32 %70, %x ; <i1> [#uses=1]
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br i1 %71, label %bb30, label %bb31.bb33_crit_edge
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bb31.bb33_crit_edge: ; preds = %bb31
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br label %bb33
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bb33: ; preds = %bb31.bb33_crit_edge, %bb29
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%72 = mul i32 %x, %w ; <i32> [#uses=1]
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%73 = getelementptr i8, i8* %j, i32 %72 ; <i8*> [#uses=1]
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%74 = mul i32 %x, %w ; <i32> [#uses=1]
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%75 = sdiv i32 %74, 2 ; <i32> [#uses=1]
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tail call void @llvm.memset.p0i8.i32(i8* %73, i8 -128, i32 %75, i1 false)
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ret void
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return: ; preds = %bb20
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ret void
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}
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind
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declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i1) nounwind
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