f5c0e6c285
The current integer widening does not support rewriting partial split slices in rewriteIntegerStore (and rewriteIntegerLoad). This patch adds explicit checks for this case in isIntegerWideningViableForSlice. Before r322533, splitting is allowed only for the whole-alloca slice and hence the above case is implicitly rejected by another check `if (DL.getTypeStoreSize(ValueTy) > Size)` because whole-alloca slice is larger than the partition. Differential Revision: https://reviews.llvm.org/D46750 llvm-svn: 332575
75 lines
2.4 KiB
LLVM
75 lines
2.4 KiB
LLVM
; RUN: opt < %s -sroa -S | FileCheck %s
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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-n32:64-S128"
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target triple = "sparcv9-sun-solaris"
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; PR37267
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; Check that we don't crash on this test.
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define i16 @f1() {
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; CHECK-LABEL: @f1
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; CHECK: %[[retval:.*]] = add i16 2, 2
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; CHECK: ret i16 %[[retval]]
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bb1:
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; This 12-byte alloca is split into partitions as [0,2), [2,4), [4,8), [8,10), [10, 12).
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; The reported error happened when rewriteIntegerStore try to widen a split tail of slice 1 for [4, 8) partition.
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; alloca 012345678901
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; slice 1: WWWW
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; slice 2: WWWW
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; slice 3: RR
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; slice 4: RR
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%a.3 = alloca [6 x i16], align 1
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; slice 1: [2,6)
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%_tmp3 = getelementptr inbounds [6 x i16], [6 x i16]* %a.3, i16 0, i16 1
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%_tmp5 = bitcast i16* %_tmp3 to i32*
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store i32 131074, i32* %_tmp5, align 1
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; slice 2: [8,12)
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%_tmp8 = getelementptr inbounds [6 x i16], [6 x i16]* %a.3, i16 0, i16 4
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%_tmp10 = bitcast i16* %_tmp8 to i32*
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store i32 131074, i32* %_tmp10, align 1
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; slice 3: [8,10)
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%_tmp12 = getelementptr inbounds [6 x i16], [6 x i16]* %a.3, i16 0, i16 4
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%_tmp13 = load i16, i16* %_tmp12, align 1
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; slice 4: [2,4)
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%_tmp15 = getelementptr inbounds [6 x i16], [6 x i16]* %a.3, i16 0, i16 1
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%_tmp16 = load i16, i16* %_tmp15, align 1
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%rc = add i16 %_tmp13, %_tmp16
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ret i16 %rc
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}
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define i16 @f2() {
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; CHECK-LABEL: @f2
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; CHECK: %[[retval:.*]] = add i16 2, undef
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; CHECK: ret i16 %[[retval]]
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bb1:
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; This 12-byte alloca is split into partitions as [0,2), [2,4), [4,8), [8,10), [10, 12).
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; The reported error happened when visitLoadInst rewrites a split tail of slice 1 for [4, 8) partition.
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; alloca 012345678901
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; slice 1: RRRR
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; slice 2: WWWW
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; slice 3: RR
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; slice 4: RR
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%a.3 = alloca [6 x i16], align 1
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; slice 1: [2,6)
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%_tmp3 = getelementptr inbounds [6 x i16], [6 x i16]* %a.3, i16 0, i16 1
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%_tmp5 = bitcast i16* %_tmp3 to i32*
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%_tmp6 = load i32, i32* %_tmp5, align 1
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; slice 2: [8,12)
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%_tmp8 = getelementptr inbounds [6 x i16], [6 x i16]* %a.3, i16 0, i16 4
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%_tmp10 = bitcast i16* %_tmp8 to i32*
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store i32 131074, i32* %_tmp10, align 1
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; slice 3: [8,10)
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%_tmp12 = getelementptr inbounds [6 x i16], [6 x i16]* %a.3, i16 0, i16 4
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%_tmp13 = load i16, i16* %_tmp12, align 1
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; slice 4: [2,4)
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%_tmp15 = getelementptr inbounds [6 x i16], [6 x i16]* %a.3, i16 0, i16 1
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%_tmp16 = load i16, i16* %_tmp15, align 1
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%rc = add i16 %_tmp13, %_tmp16
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ret i16 %rc
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}
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