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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=instcombine %s -o - | FileCheck %s
; All the "useless" instructions should be removed and we shouldn't crash.
target datalayout = "p:16:16"
%i64_t = type i64
@a = external global i16
@b = external global ptr
define void @f(i1 %cond) {
; CHECK-LABEL: @f(
; CHECK-NEXT: bb0:
; CHECK-NEXT: [[T1:%.*]] = alloca i64, align 8
; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: unreachable
; CHECK: bb2:
; CHECK-NEXT: [[T9:%.*]] = load ptr, ptr @b, align 2
; CHECK-NEXT: store i16 0, ptr [[T9]], align 2
; CHECK-NEXT: [[T10:%.*]] = load i32, ptr [[T1]], align 8
; CHECK-NEXT: [[T11:%.*]] = add i32 [[T10]], -1
; CHECK-NEXT: store i32 [[T11]], ptr [[T1]], align 8
; CHECK-NEXT: ret void
;
bb0:
%t1 = alloca %i64_t
%useless4 = getelementptr inbounds i16, ptr %t1, i16 undef
br i1 %cond, label %bb1, label %bb2
bb1: ; preds = %bb0
%useless6 = insertvalue [1 x ptr] undef, ptr %t1, 0
%useless7 = insertvalue [1 x ptr] %useless6, ptr null, 0
%t8 = ptrtoint ptr %t1 to i16
store i16 %t8, ptr @a
unreachable
bb2: ; preds = %bb0
%t9 = load ptr, ptr @b
store i16 0, ptr %t9
%t10 = load i32, ptr %t1
%t11 = sub i32 %t10, 1
store i32 %t11, ptr %t1
ret void
}
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