52 lines
1.7 KiB
LLVM
52 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -S -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 i16*
|
|
|
|
define void @f(i1 %cond) {
|
|
; CHECK-LABEL: @f(
|
|
; CHECK-NEXT: bb0:
|
|
; CHECK-NEXT: [[T12:%.*]] = alloca [2 x i32], align 8
|
|
; CHECK-NEXT: [[T12_SUB:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[T12]], i16 0, i16 0
|
|
; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
|
|
; CHECK: bb1:
|
|
; CHECK-NEXT: unreachable
|
|
; CHECK: bb2:
|
|
; CHECK-NEXT: [[T9:%.*]] = load i16*, i16** @b, align 2
|
|
; CHECK-NEXT: store i16 0, i16* [[T9]], align 2
|
|
; CHECK-NEXT: [[T10:%.*]] = load i32, i32* [[T12_SUB]], align 8
|
|
; CHECK-NEXT: [[T11:%.*]] = add i32 [[T10]], -1
|
|
; CHECK-NEXT: store i32 [[T11]], i32* [[T12_SUB]], align 8
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
bb0:
|
|
%t1 = alloca %i64_t
|
|
%t2 = bitcast %i64_t* %t1 to i32*
|
|
%useless3 = bitcast %i64_t* %t1 to i16*
|
|
%useless4 = getelementptr inbounds i16, i16* %useless3, i16 undef
|
|
%useless5 = bitcast i16* %useless4 to i32*
|
|
br i1 %cond, label %bb1, label %bb2
|
|
|
|
bb1: ; preds = %bb0
|
|
%useless6 = insertvalue [1 x i32*] undef, i32* %t2, 0
|
|
%useless7 = insertvalue [1 x i32*] %useless6, i32* null, 0
|
|
%t8 = ptrtoint i32* %t2 to i16
|
|
store i16 %t8, i16* @a
|
|
unreachable
|
|
|
|
bb2: ; preds = %bb0
|
|
%t9 = load i16*, i16** @b
|
|
store i16 0, i16* %t9
|
|
%t10 = load i32, i32* %t2
|
|
%t11 = sub i32 %t10, 1
|
|
store i32 %t11, i32* %t2
|
|
ret void
|
|
}
|