forked from OSchip/llvm-project
54 lines
1.8 KiB
LLVM
54 lines
1.8 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -instcombine %s -o - | FileCheck %s
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; All the "useless" instructions should be removed and we shouldn't crash.
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target datalayout = "p:16:16"
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%i64_t = type i64
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@a = external global i16
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@b = external global i16*
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define void @f() {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: bb0:
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; CHECK-NEXT: [[TMP12:%.*]] = alloca [2 x i32], align 8
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; CHECK-NEXT: [[TMP12_SUB:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[TMP12]], i16 0, i16 0
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; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[TMP8:%.*]] = ptrtoint [2 x i32]* [[TMP12]] to i16
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; CHECK-NEXT: store i16 [[TMP8]], i16* @a, align 2
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; CHECK-NEXT: unreachable
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; CHECK: bb2:
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; CHECK-NEXT: [[TMP9:%.*]] = load i16*, i16** @b, align 2
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; CHECK-NEXT: store i16 0, i16* [[TMP9]], align 2
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; CHECK-NEXT: [[TMP10:%.*]] = load i32, i32* [[TMP12_SUB]], align 8
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; CHECK-NEXT: [[TMP11:%.*]] = add i32 [[TMP10]], -1
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; CHECK-NEXT: store i32 [[TMP11]], i32* [[TMP12_SUB]], align 8
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; CHECK-NEXT: ret void
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;
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bb0:
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%tmp1 = alloca %i64_t
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%tmp2 = bitcast %i64_t* %tmp1 to i32*
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%useless3 = bitcast %i64_t* %tmp1 to i16*
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%useless4 = getelementptr inbounds i16, i16* %useless3, i16 undef
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%useless5 = bitcast i16* %useless4 to i32*
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br i1 undef, label %bb1, label %bb2
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bb1: ; preds = %bb0
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%useless6 = insertvalue [1 x i32*] undef, i32* %tmp2, 0
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%useless7 = insertvalue [1 x i32*] %useless6, i32* null, 0
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%tmp8 = ptrtoint i32* %tmp2 to i16
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store i16 %tmp8, i16* @a
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unreachable
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bb2: ; preds = %bb0
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%tmp9 = load i16*, i16** @b
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store i16 0, i16* %tmp9
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%tmp10 = load i32, i32* %tmp2
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%tmp11 = sub i32 %tmp10, 1
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store i32 %tmp11, i32* %tmp2
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ret void
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}
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