llvm-mirror/test/Transforms/GVN/constexpr-vector-constainsundef-crash.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -gvn -S %s | FileCheck %s

; Reduced test case from
; https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24278

; Make sure we do not crash when dealing with a vector constant expression.
define <4 x i64*> @test(i64* %ptr) {
; CHECK-LABEL: @test(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    ret <4 x i64*> getelementptr (i64, i64* null, <4 x i64> <i64 0, i64 0, i64 0, i64 -128>)
;
entry:
  %B9 = sdiv i16 -32768, 256
  %L3 = load i64, i64* %ptr, align 4
  %B3 = sub i16 0, %B9
  %0 = insertelement <4 x i16> undef, i16 %B3, i32 3
  %1 = sub <4 x i16> zeroinitializer, %0
  %2 = sext <4 x i16> %1 to <4 x i32>
  %3 = getelementptr inbounds i64, i64* null, <4 x i32> %2
  %I6 = insertelement <4 x i64*> %3, i64* undef, i64 %L3
  ret <4 x i64*> %I6
}
[ValueTracking] Check for ConstantExpr before using recursive helpers. Make sure we do not call constainsConstantExpression/containsUndefElement on ConstantExpression, which is not supported. In particular, containsUndefElement/constainsConstantExpression are only supported on constants which are supported by getAggregateElement. Unfortunately there's no convenient way to check if a constant supports getAggregateElement, so just check for non-constantexpressions with vector type. Other users of those functions do so too. Reviewers: spatel, nikic, craig.topper, lebedev.ri, jdoerfert, aqjune Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D84512 2020-07-24 18:28:01 +02:00			`; NOTE: Assertions have been autogenerated by utils/update_test_checks.py`
			`; RUN: opt -gvn -S %s \| FileCheck %s`

			`; Reduced test case from`
			`; https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24278`

			`; Make sure we do not crash when dealing with a vector constant expression.`
			`define <4 x i64> @test(i64 %ptr) {`
			`; CHECK-LABEL: @test(`
			`; CHECK-NEXT: entry:`
			`; CHECK-NEXT: ret <4 x i64> getelementptr (i64, i64 null, <4 x i64> <i64 0, i64 0, i64 0, i64 -128>)`
			`;`
			`entry:`
			`%B9 = sdiv i16 -32768, 256`
			`%L3 = load i64, i64* %ptr, align 4`
			`%B3 = sub i16 0, %B9`
			`%0 = insertelement <4 x i16> undef, i16 %B3, i32 3`
			`%1 = sub <4 x i16> zeroinitializer, %0`
			`%2 = sext <4 x i16> %1 to <4 x i32>`
			`%3 = getelementptr inbounds i64, i64* null, <4 x i32> %2`
			`%I6 = insertelement <4 x i64> %3, i64 undef, i64 %L3`
			`ret <4 x i64*> %I6`
			`}`