055bfc0271
GEPs are often in the form `gep [N x %T], ptr %p, i64 0, i64 %idx`. Canonicalize these to `gep %T, ptr %p, i64 %idx`. This enables transforms that only support one GEP index to work and improves CSE. Various transforms were recently hardened to make sure they still work without the leading index.
64 lines
3.0 KiB
LLVM
64 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt < %s -passes=loop-vectorize,dce,instcombine -force-vector-interleave=1 -force-vector-width=4 -S | FileCheck %s
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; From a simple program with two address spaces:
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; char Y[4*10000] __attribute__((address_space(1)));
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; char X[4*10000];
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; int main() {
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; for (int i = 0; i < 4*10000; ++i)
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; X[i] = Y[i] + 1;
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; return 0;
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;}
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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"
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@Y = common addrspace(1) global [40000 x i8] zeroinitializer, align 16
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@X = common global [40000 x i8] zeroinitializer, align 16
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define i32 @main() #0 {
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; CHECK-LABEL: define i32 @main
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; CHECK-SAME: () #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
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; CHECK: vector.ph:
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; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds i8, ptr addrspace(1) @Y, i64 [[INDEX]]
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; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x i8>, ptr addrspace(1) [[TMP0]], align 1
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; CHECK-NEXT: [[TMP1:%.*]] = add <4 x i8> [[WIDE_LOAD]], splat (i8 1)
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; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i8, ptr @X, i64 [[INDEX]]
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; CHECK-NEXT: store <4 x i8> [[TMP1]], ptr [[TMP2]], align 1
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
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; CHECK-NEXT: [[TMP3:%.*]] = icmp eq i64 [[INDEX_NEXT]], 40000
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; CHECK-NEXT: br i1 [[TMP3]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: middle.block:
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; CHECK-NEXT: br label [[FOR_END:%.*]]
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; CHECK: scalar.ph:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: br i1 poison, label [[FOR_END]], label [[FOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
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; CHECK: for.end:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds [40000 x i8], ptr addrspace(1) @Y, i64 0, i64 %indvars.iv
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%0 = load i8, ptr addrspace(1) %arrayidx, align 1
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%add = add i8 %0, 1
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%arrayidx3 = getelementptr inbounds [40000 x i8], ptr @X, i64 0, i64 %indvars.iv
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store i8 %add, ptr %arrayidx3, align 1
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, 40000
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret i32 0
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}
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attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
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