forked from OSchip/llvm-project
52 lines
1.7 KiB
LLVM
52 lines
1.7 KiB
LLVM
; 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(i1 %cond) {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: bb0:
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; CHECK-NEXT: [[T12:%.*]] = alloca [2 x i32], align 8
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; CHECK-NEXT: [[T12_SUB:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[T12]], i16 0, i16 0
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: unreachable
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; CHECK: bb2:
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; CHECK-NEXT: [[T9:%.*]] = load i16*, i16** @b, align 2
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; CHECK-NEXT: store i16 0, i16* [[T9]], align 2
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; CHECK-NEXT: [[T10:%.*]] = load i32, i32* [[T12_SUB]], align 8
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; CHECK-NEXT: [[T11:%.*]] = add i32 [[T10]], -1
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; CHECK-NEXT: store i32 [[T11]], i32* [[T12_SUB]], align 8
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; CHECK-NEXT: ret void
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;
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bb0:
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%t1 = alloca %i64_t
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%t2 = bitcast %i64_t* %t1 to i32*
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%useless3 = bitcast %i64_t* %t1 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 %cond, label %bb1, label %bb2
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bb1: ; preds = %bb0
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%useless6 = insertvalue [1 x i32*] undef, i32* %t2, 0
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%useless7 = insertvalue [1 x i32*] %useless6, i32* null, 0
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%t8 = ptrtoint i32* %t2 to i16
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store i16 %t8, i16* @a
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unreachable
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bb2: ; preds = %bb0
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%t9 = load i16*, i16** @b
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store i16 0, i16* %t9
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%t10 = load i32, i32* %t2
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%t11 = sub i32 %t10, 1
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store i32 %t11, i32* %t2
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ret void
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}
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