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TheRock/compiler/amd-llvm/llvm/test/Transforms/GVN/constexpr-vector-constainsundef-crash.ll
derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

26 lines
1010 B
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=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 ptr> @test(ptr %ptr) null_pointer_is_valid {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[L3:%.*]] = load i64, ptr [[PTR:%.*]], align 4
; CHECK-NEXT: [[I6:%.*]] = insertelement <4 x ptr> getelementptr inbounds (i64, ptr null, <4 x i64> <i64 0, i64 0, i64 0, i64 -128>), ptr undef, i64 [[L3]]
; CHECK-NEXT: ret <4 x ptr> [[I6]]
;
entry:
%B9 = sdiv i16 -32768, 256
%L3 = load i64, ptr %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, ptr null, <4 x i32> %2
%I6 = insertelement <4 x ptr> %3, ptr undef, i64 %L3
ret <4 x ptr> %I6
}