a512ce5e12
Reduced from the case which triggered the revert of 498aa534f4, and then generalized to cover both expansion paths.
41 lines
1.8 KiB
LLVM
41 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=loop-vectorize -force-vector-interleave=4 -force-vector-width=1 -S | FileCheck %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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; Test the scalar expansion of a non-constant stride pointer IV
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define void @non_constant_scalar_expansion(i32 %0, ptr %call) {
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; CHECK-LABEL: @non_constant_scalar_expansion(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[MUL:%.*]] = shl i32 [[TMP0:%.*]], 1
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; CHECK-NEXT: br label [[FOR_COND:%.*]]
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; CHECK: for.cond:
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; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ 30, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND]] ]
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; CHECK-NEXT: [[P_0:%.*]] = phi ptr [ null, [[ENTRY]] ], [ [[ADD_PTR:%.*]], [[FOR_COND]] ]
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; CHECK-NEXT: [[ADD_PTR]] = getelementptr i8, ptr [[P_0]], i32 [[MUL]]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr ptr, ptr [[CALL:%.*]], i32 [[TMP1]]
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; CHECK-NEXT: store ptr [[P_0]], ptr [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[INC]] = add i32 [[TMP1]], 1
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; CHECK-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i32 [[TMP1]], 0
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; CHECK-NEXT: br i1 [[TOBOOL_NOT]], label [[FOR_END:%.*]], label [[FOR_COND]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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entry:
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%mul = shl i32 %0, 1
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br label %for.cond
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for.cond: ; preds = %for.body, %entry
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%1 = phi i32 [ 30, %entry ], [ %inc, %for.cond ]
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%p.0 = phi ptr [ null, %entry ], [ %add.ptr, %for.cond ]
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%add.ptr = getelementptr i8, ptr %p.0, i32 %mul
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%arrayidx = getelementptr ptr, ptr %call, i32 %1
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store ptr %p.0, ptr %arrayidx, align 4
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%inc = add i32 %1, 1
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%tobool.not = icmp eq i32 %1, 0
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br i1 %tobool.not, label %for.end, label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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